BCDA V3 – Clarification on FHIR Mapping for CLM_PROD_TYPE_CD (CCLF vs. BCDA V3)

[Ashvani goyal]

Hi BCDA Team,

We would like to request clarification regarding the mapping of CLM_PROD_TYPE_CD (Claim Product Type Code) between the CCLF file and BCDA V3.

As per the CCLF Version 39 documentation, CLM_PROD_TYPE_CD is a one-character field used to classify the diagnosis category. The documented values include:

• E – Accident diagnosis code
• 1 – First diagnosis E code
• D – Other diagnosis code

However, in BCDA V3, we are receiving diagnosis type values such as:

• principal
• admitting
• other

We are currently following the following FHIR mapping for this field:

FHIR Path: ExplanationOfBenefit.diagnosis.type.coding

Could you please clarify the following:

1. Is ExplanationOfBenefit.diagnosis.type.coding the correct FHIR path to use for mapping CLM_PROD_TYPE_CD?
2. How should the BCDA V3 values such as principal, admitting, and other be mapped to the corresponding CCLF CLM_PROD_TYPE_CD values (E, 1, D)?
3. Is there any additional FHIR field or coding system that should be considered to distinguish accident diagnosis, first diagnosis E-code, and other diagnosis?
4. If the BCDA V3 values do not have a direct one-to-one mapping with the CCLF values, could you please provide the recommended mapping logic for generating CLM_PROD_TYPE_CD from BCDA V3 data?

We want to ensure that our BCDA V3 → CCLF transformation follows the expected CMS/BCDA mapping and does not introduce differences from the existing CCLF output.

Please provide the recommended mapping or any relevant documentation for this field.

Thanks,
Ashvani Goyal

[Ashvani goyal]

Hi Team,

We are still awaiting for your response.

Thanks
Ashvani Goyal

[Beneficiary Claims Data API (BCDA) Community]

Hi Ashvani ,

Thank you for your question about the mappings of CLM_PROD_TYPE_CD!

We were able to confirm that ExplanationOfBenefit.diagnosis.type.coding is the correct FHIR path to use for mapping CLM_PROD_TYPE_CD. After checking with our upstream data source, the Beneficiary FHIR Data (BFD) Server, the values of CLM_PROD_TYPE_CD are translated into FHIR diagnosis type codes based on https://terminology.hl7.org/7.3.0/en/CodeSystem-ex-diagnosistype.html and https://hl7.org/fhir/us/carin-bb/STU2.2/en/CodeSystem-C4BBClaimDiagnosisType.html. 

The mapping from CLM_PROD_TYPE_CD to FHIR Diagnosis Type is as follows:

1: externalCauseOfInjury
A: admitting
D: other
E: externalCauseOfInjury
P: principal
R: patientReasonForVisit

If you find any deviations from this mapping behavior, please reach out to us and we can further investigate any examples.

Thank you,

The BCDA Team