Question 1

What is ICD-10 code D27.9?

Accepted Answer

D27.9 is the ICD-10-CM diagnosis code for benign neoplasm of unspecified ovary. A non-cancerous tumor of the ovary when the specific side (left or right) is not documented or is unclear. D27.9 sits in the ICD-10-CM chapter for neoplasms (c00-d49), within the section covering benign neoplasms, except benign neuroendocrine tumors (d10-d36).

D27.9 is a billable ICD-10-CM code, but the current payload does not show a mapping under the CMS-HCC V28 or V24 community payment models, and none under the ESRD, Part D RxHCC, or HHS-HCC models. Do not assign risk adjustment value from this page when no source-backed mapping is shown; verify the applicable model and payment year.

Use only when laterality cannot be determined from medical record documentation.

Question 2

Is D27.9 an HCC code?

Accepted Answer

D27.9 has no payable CMS-HCC V28 mapping in the final FY2026 CMS file.

Question 3

Is D27.9 billable?

Accepted Answer

Yes. D27.9 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. D27.9 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

Which HCC does D27.9 map to under V28?

Accepted Answer

D27.9 has no payable CMS-HCC V28 mapping in the final FY2026 CMS file.

Question 5

What RAF reference is published for D27.9?

Accepted Answer

D27.9 has no V28 reference coefficient because the final FY2026 source verifies no payable V28 mapping.

Question 6

What is the V28 vs V24 difference for D27.9?

Accepted Answer

D27.9 has verified no payable V28 mapping in the final FY2026 source. Select a historical effective period before making any V24 comparison.

Question 7

What documentation supports D27.9?

Accepted Answer

Use only when laterality cannot be determined from medical record documentation Query provider if imaging or operative reports specify laterality to allow for more specific coding D27.9 is not a CMS-HCC V28 payment code in the verified current source, so MEAT is not the payment hook. Documentation still has to support the diagnosis if you report it.

Question 8

Can D27.9 be a primary diagnosis?

Accepted Answer

Yes. D27.9 carries no code-first instruction in the FY2026 tabular, so it can be the first-listed diagnosis when it is the condition chiefly responsible for the encounter and the note supports it, and it can also be reported as a secondary diagnosis. For risk adjustment the order does not matter; the V28 category is the same either way.

Question 9

Which codes cannot be reported with D27.9?

Accepted Answer

No Excludes1 note applies to D27.9 or its category in the FY2026 tabular, so there is no code the classification forbids alongside it. The Excludes2 note lists corpus albicans cyst (N83.2-); corpus luteum cyst (N83.1-); endometrial cyst (N80.1-); follicular (atretic) cyst (N83.0-); and 3 more (see the notes on this page); those are separate conditions that may be reported together with D27.9 when both are documented.

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D27.9

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D27.9 ICD-10-CM Code: Benign neoplasm of unspecified ovary

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D27.9

Is D27.9 an HCC code?

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What This Code Means

Coding Tips

Child Codes

Code Hierarchy

Also searched as

Work D27.9 in HCC Buddy