Question 1

What is ICD-10 code D37.030?

Accepted Answer

D37.030 is the ICD-10-CM diagnosis code for neoplasm of uncertain behavior of the parotid salivary glands. A growth in the parotid salivary glands (the large salivary glands in front of the ears) with uncertain behavior that requires monitoring or further testing. D37.030 sits in the ICD-10-CM chapter for neoplasms (c00-d49), within the section covering neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes (d37-d48).

D37.030 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.

The fifth character '0' specifies parotid glands; ensure you have the correct salivary gland site documented before coding.

Question 2

Is D37.030 an HCC code?

Accepted Answer

No. D37.030 is a billable ICD-10-CM code but does not map to any payment HCC category under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can still be reported on Medicare Advantage encounter data submissions, but it does not contribute to the beneficiary's Risk Adjustment Factor (RAF) score and therefore does not affect the risk-adjusted capitation payment to the plan. V28 reached 100% phase-in for payment year 2026.

Question 3

Is D37.030 billable?

Accepted Answer

Yes. D37.030 is a billable ICD-10-CM code that can be reported on professional and institutional claims as a primary or secondary diagnosis when the provider documentation supports the specific condition described. Billable codes in ICD-10-CM are coded to the highest level of specificity available for the documented diagnosis. D37.030 is current for fiscal year 2026 and remains in the active CMS ICD-10-CM code set published by the National Center for Health Statistics.

Question 4

What is the V28 vs V24 difference for D37.030?

Accepted Answer

D37.030 does not map to a payment HCC under either the CMS-HCC V28 risk adjustment model or the older V24 model. V28 reached 100% phase-in for payment year 2026, replacing V24 which was used during the PY2024–PY2025 transition. Because neither model rewards D37.030 with a risk adjustment factor, it contributes zero to a Medicare Advantage beneficiary's RAF score in either version. Coders should check whether provider documentation supports a more specific child code that does map to a payment HCC.

Question 5

What should coders know when reporting D37.030?

Accepted Answer

The fifth character '0' specifies parotid glands; ensure you have the correct salivary gland site documented before coding Coordinate with pathology reports to confirm uncertain behavior classification

D37.030

Is D37.030 an HCC code?

What This Code Means

Coding Tips

Code Hierarchy

Open D37.030 in the Interactive Encoder