> ## Documentation Index
> Fetch the complete documentation index at: https://docs.corti.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Coding Systems

> Supported medical coding systems, feature availability, and typical combinations by encounter type

export const Stable = () => <Icon icon="check" color="#16a34a" size={18} />;

export const Beta = () => <Icon icon="circle-check" color="#84cc16" size={18} />;

export const Alpha = ({system, country, feature}) => <a href={`https://www.corti.ai/contact-us?products=medical-coding,api&use_case=${encodeURIComponent(feature ? `I'd like early access to the ${feature} feature for ${system} (${country}) via the Corti Medical Coding API. Please get in touch to discuss my use case and next steps.` : `I'd like early access to ${system} (${country}) via the Corti Medical Coding API. Please get in touch to discuss my use case and next steps.`)}`} target="_blank" rel="noopener noreferrer" title={feature ? `Contact us for ${feature} (${system}, ${country}) alpha access` : `Contact us for ${system} (${country}) alpha access`} style={{
  all: 'unset',
  cursor: 'pointer',
  display: 'inline-flex',
  color: '#3b82f6'
}}><Icon icon="circle-dashed" color="#3b82f6" size={18} /></a>;

export const ComingSoon = ({system, country, feature}) => <a href={`https://www.corti.ai/contact-us?products=medical-coding,api&use_case=${encodeURIComponent(feature ? `I'd like early access to the ${feature} feature for ${system} (${country}) via the Corti Medical Coding API. Please get in touch to discuss my use case and next steps.` : `I'd like early access to ${system} (${country}) via the Corti Medical Coding API. Please get in touch to discuss my use case and next steps.`)}`} target="_blank" rel="noopener noreferrer" title={feature ? `Contact us for ${feature} (${system}, ${country}) alpha access` : `Contact us for ${system} (${country}) alpha access`} style={{
  all: 'unset',
  cursor: 'pointer',
  display: 'inline-flex',
  color: '#3b82f6'
}}><Icon icon="circle-dashed" color="#3b82f6" size={18} /></a>;

export const MatrixSearch = () => {
  const ref = React.useRef(null);
  React.useEffect(() => {
    if (!ref.current) return;
    const table = ref.current.parentElement.querySelector('table');
    if (!table) return;
    table.querySelectorAll('td:first-child, th:first-child').forEach(cell => {
      cell.style.whiteSpace = 'nowrap';
    });
    const rows = Array.from(table.querySelectorAll('tbody tr'));
    const input = ref.current.querySelector('input');
    if (!input) return;
    const handler = e => {
      const q = (e.target.value || '').toLowerCase().trim();
      let currentCountryVisible = false;
      let countryRow = null;
      rows.forEach(row => {
        const text = row.querySelector('td').textContent.toLowerCase().trim();
        const isBold = row.querySelector('td strong');
        if (isBold) {
          if (countryRow) {
            countryRow.style.display = currentCountryVisible ? '' : 'none';
          }
          countryRow = row;
          currentCountryVisible = false;
          const countryMatch = text.indexOf(q) !== -1;
          if (countryMatch) currentCountryVisible = true;
          row.style.display = '';
        } else {
          const systemMatch = text.indexOf(q) !== -1;
          const countryText = countryRow ? countryRow.querySelector('td').textContent.toLowerCase().trim() : '';
          const countryMatch = countryText.indexOf(q) !== -1;
          const visible = !q || systemMatch || countryMatch;
          row.style.display = visible ? '' : 'none';
          if (visible) currentCountryVisible = true;
        }
      });
      if (countryRow) {
        countryRow.style.display = currentCountryVisible ? '' : 'none';
      }
    };
    input.addEventListener('input', handler);
    return () => input.removeEventListener('input', handler);
  }, []);
  return <div ref={ref} style={{
    marginBottom: '16px'
  }}>
      <input type="text" aria-label="Search by country or coding system" placeholder="Search by country or coding system..." style={{
    width: '100%',
    maxWidth: '400px',
    padding: '8px 12px',
    fontSize: '14px',
    border: '1px solid var(--border, #e5e7eb)',
    borderRadius: '8px',
    backgroundColor: 'transparent',
    color: 'inherit',
    outline: 'none'
  }} />
    </div>;
};

## Feature availability

<Stable /> **Stable**   Production-ready AI, evaluated on large, diverse datasets.<br /><Beta /> **Beta**   Fully functional, with ongoing rapid improvements.<br /><Alpha system="system" country="country" /> **Alpha**   Early access only. [Contact us](https://www.corti.ai/contact-us?products=medical-coding,api) to request access.

<Info>Click <Icon icon="circle-dashed" color="#3b82f6" size={18} /> wherever it appears to request early access to that feature.</Info>

<div className="coding-matrix" style={{overflowX: 'auto'}}>
  <MatrixSearch />

  | Country / Code System                |                                             Codes                                             |                                        Evidences                                       |                                        Alternatives                                       |                                        Sequencing                                       |
  | :----------------------------------- | :-------------------------------------------------------------------------------------------: | :------------------------------------------------------------------------------------: | :---------------------------------------------------------------------------------------: | :-------------------------------------------------------------------------------------: |
  | **US**                               |                                                                                               |                                                                                        |                                                                                           |                                                                                         |
  |     [ICD-10-CM](/coding/icd-10-cm)   |                                           <Stable />                                          |                                       <Stable />                                       |                                         <Stable />                                        |        <Alpha system="ICD-10-CM" country="United States" feature="Sequencing" />        |
  |     [ICD-10-PCS](/coding/icd-10-pcs) |                                           <Stable />                                          |                                       <Stable />                                       |                                         <Stable />                                        |        <Alpha system="ICD-10-PCS" country="United States" feature="Sequencing" />       |
  |     [CPT](/coding/cpt)               |                                            <Beta />                                           |                                        <Beta />                                        |         <ComingSoon system="CPT" country="United States" feature="Alternatives" />        |                                           N/A                                           |
  |     [HCPCS Level II](/coding/hcpcs)  |           <Alpha system="HCPCS Level II" country="United States" feature="Codes" />           |      <Alpha system="HCPCS Level II" country="United States" feature="Evidences" />     |      <Alpha system="HCPCS Level II" country="United States" feature="Alternatives" />     |                                           N/A                                           |
  |     [SNOMED CT](/coding/snomed-ct)   |              <Alpha system="SNOMED CT" country="United States" feature="Codes" />             |        <Alpha system="SNOMED CT" country="United States" feature="Evidences" />        |        <Alpha system="SNOMED CT" country="United States" feature="Alternatives" />        |                                           N/A                                           |
  | **United Kingdom**                   |                                                                                               |                                                                                        |                                                                                           |                                                                                         |
  |     [NHS ICD-10](/coding/icd-10-uk)  |                                           <Stable />                                          |                                       <Stable />                                       |                                         <Stable />                                        |       <Alpha system="NHS ICD-10" country="United Kingdom" feature="Sequencing" />       |
  |     [OPCS-4](/coding/opcs-4)         |                                           <Stable />                                          |                                       <Stable />                                       |                                         <Stable />                                        |         <Alpha system="OPCS-4" country="United Kingdom" feature="Sequencing" />         |
  |     [SNOMED CT](/coding/snomed-ct)   |             <Alpha system="SNOMED CT" country="United Kingdom" feature="Codes" />             |        <Alpha system="SNOMED CT" country="United Kingdom" feature="Evidences" />       |        <Alpha system="SNOMED CT" country="United Kingdom" feature="Alternatives" />       |                                           N/A                                           |
  | **Germany**                          |                                                                                               |                                                                                        |                                                                                           |                                                                                         |
  |     [ICD-10-GM](/coding/icd-10-gm)   |                                            <Beta />                                           |                                        <Beta />                                        |                                          <Beta />                                         |           <Alpha system="ICD-10-GM" country="Germany" feature="Sequencing" />           |
  |     [OPS](/coding/ops)               |                                            <Beta />                                           |                                        <Beta />                                        |                                          <Beta />                                         |              <Alpha system="OPS" country="Germany" feature="Sequencing" />              |
  |     [SNOMED CT](/coding/snomed-ct)   |           <Alpha system="SNOMED CT" country="Germany" feature="Code Predictions" />           |           <Alpha system="SNOMED CT" country="Germany" feature="Evidences" />           |           <Alpha system="SNOMED CT" country="Germany" feature="Alternatives" />           |                                           N/A                                           |
  | **France**                           |                                                                                               |                                                                                        |                                                                                           |                                                                                         |
  |     [CIM-10-FR](/coding/cim-10-fr)   |                                            <Beta />                                           |                                        <Beta />                                        |                                          <Beta />                                         |            <Alpha system="CIM-10-FR" country="France" feature="Sequencing" />           |
  |     [CCAM](/coding/ccam)             |                                            <Beta />                                           |                                        <Beta />                                        |                                          <Beta />                                         |              <Alpha system="CCAM" country="France" feature="Sequencing" />              |
  |     [SNOMED CT](/coding/snomed-ct)   |            <Alpha system="SNOMED CT" country="France" feature="Code Predictions" />           |            <Alpha system="SNOMED CT" country="France" feature="Evidences" />           |            <Alpha system="SNOMED CT" country="France" feature="Alternatives" />           |                                           N/A                                           |
  | **International**                    |                                                                                               |                                                                                        |                                                                                           |                                                                                         |
  |     [ICD-10](/coding/icd-10-int)     |                                           <Stable />                                          |                                       <Stable />                                       |                                         <Stable />                                        |                                           N/A                                           |
  |     [ICD-11](/coding/icd-11)         |          <Alpha system="ICD-11" country="International" feature="Code Predictions" />         |          <Alpha system="ICD-11" country="International" feature="Evidences" />         |          <Alpha system="ICD-11" country="International" feature="Alternatives" />         |                                           N/A                                           |
  |     [SNOMED CT](/coding/snomed-ct)   |        <Alpha system="SNOMED CT" country="International" feature="Code Predictions" />        |        <Alpha system="SNOMED CT" country="International" feature="Evidences" />        |        <Alpha system="SNOMED CT" country="International" feature="Alternatives" />        |                                           N/A                                           |
  |     [LOINC](/coding/loinc)           |          <Alpha system="LOINC" country="International" feature="Code Predictions" />          |          <Alpha system="LOINC" country="International" feature="Evidences" />          |          <Alpha system="LOINC" country="International" feature="Alternatives" />          |                                           N/A                                           |
  | **Australia**                        |                                                                                               |                                                                                        |                                                                                           |                                                                                         |
  |     [ICD-10-AM](/coding/icd-10-am)   |        <ComingSoon system="ICD-10-AM" country="Australia" feature="Code Predictions" />       |        <ComingSoon system="ICD-10-AM" country="Australia" feature="Evidences" />       |        <ComingSoon system="ICD-10-AM" country="Australia" feature="Alternatives" />       |          <Alpha system="ICD-10-AM" country="Australia" feature="Sequencing" />          |
  |     [ACHI](/coding/achi)             |          <ComingSoon system="ACHI" country="Australia" feature="Code Predictions" />          |          <ComingSoon system="ACHI" country="Australia" feature="Evidences" />          |          <ComingSoon system="ACHI" country="Australia" feature="Alternatives" />          |             <Alpha system="ACHI" country="Australia" feature="Sequencing" />            |
  | **Canada**                           |                                                                                               |                                                                                        |                                                                                           |                                                                                         |
  |     [ICD-10-CA](/coding/icd-10-ca)   |         <ComingSoon system="ICD-10-CA" country="Canada" feature="Code Predictions" />         |         <ComingSoon system="ICD-10-CA" country="Canada" feature="Evidences" />         |         <ComingSoon system="ICD-10-CA" country="Canada" feature="Alternatives" />         |            <Alpha system="ICD-10-CA" country="Canada" feature="Sequencing" />           |
  | **Denmark**                          |                                                                                               |                                                                                        |                                                                                           |                                                                                         |
  |     [SKS](/coding/icd-10-dk)         |           <Alpha system="SKS ICD-10" country="Denmark" feature="Code Predictions" />          |           <Alpha system="SKS ICD-10" country="Denmark" feature="Evidences" />          |           <Alpha system="SKS ICD-10" country="Denmark" feature="Alternatives" />          |           <Alpha system="SKS ICD-10" country="Denmark" feature="Sequencing" />          |
  |     [SNOMED CT](/coding/snomed-ct)   |           <Alpha system="SNOMED CT" country="Denmark" feature="Code Predictions" />           |           <Alpha system="SNOMED CT" country="Denmark" feature="Evidences" />           |           <Alpha system="SNOMED CT" country="Denmark" feature="Alternatives" />           |                                           N/A                                           |
  | **Netherlands**                      |                                                                                               |                                                                                        |                                                                                           |                                                                                         |
  |     [ICD-10-NL](/coding/icd-10-nl)   |       <ComingSoon system="ICD-10-NL" country="Netherlands" feature="Code Predictions" />      |       <ComingSoon system="ICD-10-NL" country="Netherlands" feature="Evidences" />      |       <ComingSoon system="ICD-10-NL" country="Netherlands" feature="Alternatives" />      |         <Alpha system="ICD-10-NL" country="Netherlands" feature="Sequencing" />         |
  | **Norway**                           |                                                                                               |                                                                                        |                                                                                           |                                                                                         |
  |     [ICD-10-NO](/coding/icd-10-no)   |            <Alpha system="ICD-10-NO" country="Norway" feature="Code Predictions" />           |            <Alpha system="ICD-10-NO" country="Norway" feature="Evidences" />           |            <Alpha system="ICD-10-NO" country="Norway" feature="Alternatives" />           |            <Alpha system="ICD-10-NO" country="Norway" feature="Sequencing" />           |
  |     [NCSP / NCMP](/coding/ncsp-ncmp) |           <Alpha system="NCSP / NCMP" country="Norway" feature="Code Predictions" />          |           <Alpha system="NCSP / NCMP" country="Norway" feature="Evidences" />          |           <Alpha system="NCSP / NCMP" country="Norway" feature="Alternatives" />          |           <Alpha system="NCSP / NCMP" country="Norway" feature="Sequencing" />          |
  |     [SNOMED CT](/coding/snomed-ct)   |            <Alpha system="SNOMED CT" country="Norway" feature="Code Predictions" />           |            <Alpha system="SNOMED CT" country="Norway" feature="Evidences" />           |            <Alpha system="SNOMED CT" country="Norway" feature="Alternatives" />           |                                           N/A                                           |
  | **Spain**                            |                                                                                               |                                                                                        |                                                                                           |                                                                                         |
  |     [CIE-10-ES](/coding/cie-10-es)   |            <Alpha system="CIE-10-ES" country="Spain" feature="Code Predictions" />            |            <Alpha system="CIE-10-ES" country="Spain" feature="Evidences" />            |            <Alpha system="CIE-10-ES" country="Spain" feature="Alternatives" />            |            <Alpha system="CIE-10-ES" country="Spain" feature="Sequencing" />            |
  |     [CIE-10-PCS](/coding/cie-10-pcs) |            <Alpha system="CIE-10-PCS" country="Spain" feature="Code Predictions" />           |            <Alpha system="CIE-10-PCS" country="Spain" feature="Evidences" />           |            <Alpha system="CIE-10-PCS" country="Spain" feature="Alternatives" />           |            <Alpha system="CIE-10-PCS" country="Spain" feature="Sequencing" />           |
  |     [SNOMED CT](/coding/snomed-ct)   |            <Alpha system="SNOMED CT" country="Spain" feature="Code Predictions" />            |            <Alpha system="SNOMED CT" country="Spain" feature="Evidences" />            |            <Alpha system="SNOMED CT" country="Spain" feature="Alternatives" />            |                                           N/A                                           |
  | **Sweden**                           |                                                                                               |                                                                                        |                                                                                           |                                                                                         |
  |     [ICD-10-SE](/coding/icd-10-se)   |            <Alpha system="ICD-10-SE" country="Sweden" feature="Code Predictions" />           |            <Alpha system="ICD-10-SE" country="Sweden" feature="Evidences" />           |            <Alpha system="ICD-10-SE" country="Sweden" feature="Alternatives" />           |            <Alpha system="ICD-10-SE" country="Sweden" feature="Sequencing" />           |
  |     [SNOMED CT](/coding/snomed-ct)   |            <Alpha system="SNOMED CT" country="Sweden" feature="Code Predictions" />           |            <Alpha system="SNOMED CT" country="Sweden" feature="Evidences" />           |            <Alpha system="SNOMED CT" country="Sweden" feature="Alternatives" />           |                                           N/A                                           |
  | **Switzerland**                      |                                                                                               |                                                                                        |                                                                                           |                                                                                         |
  |     [ICD-10-GM](/coding/icd-10-ch)   | <Alpha system="ICD-10-GM (Swiss Edition)" country="Switzerland" feature="Code Predictions" /> | <Alpha system="ICD-10-GM (Swiss Edition)" country="Switzerland" feature="Evidences" /> | <Alpha system="ICD-10-GM (Swiss Edition)" country="Switzerland" feature="Alternatives" /> | <Alpha system="ICD-10-GM (Swiss Edition)" country="Switzerland" feature="Sequencing" /> |
  |     [CHOP](/coding/chop)             |            <Alpha system="CHOP" country="Switzerland" feature="Code Predictions" />           |            <Alpha system="CHOP" country="Switzerland" feature="Evidences" />           |            <Alpha system="CHOP" country="Switzerland" feature="Alternatives" />           |            <Alpha system="CHOP" country="Switzerland" feature="Sequencing" />           |
  |     [SNOMED CT](/coding/snomed-ct)   |         <Alpha system="SNOMED CT" country="Switzerland" feature="Code Predictions" />         |         <Alpha system="SNOMED CT" country="Switzerland" feature="Evidences" />         |         <Alpha system="SNOMED CT" country="Switzerland" feature="Alternatives" />         |                                           N/A                                           |
</div>

Interested in a country not listed? [Contact us](https://www.corti.ai/contact-us) to discuss your use case.

## Typical combinations

* **US inpatient admission:** `icd10cm-inpatient` + `icd10pcs`
* **US outpatient / ED / office visit:** `icd10cm-outpatient` + `cpt`
* **UK inpatient admission:** `icd10uk-inpatient` + `opcs4`
* **UK outpatient:** `icd10uk-outpatient`
* **German inpatient admission:** `icd10gm-inpatient` + `ops`
* **German outpatient:** `icd10gm-outpatient`
* **French inpatient admission (PMSI):** `cim10fr-inpatient` + `ccam`
* **French outpatient / ambulatory:** `cim10fr-outpatient` + `ccam`
* **International inpatient:** `icd10int-inpatient` (or a national extension such as `icd10gm-inpatient`)

<Note>Please [contact us](https://help.corti.app) if you need help choosing the right coding system for your use case or require a system not listed here.</Note>