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C69.81 ICD-10-CM Code: Malignant neoplasm of overlapping sites of right eye and adnexa

C69.81 maps to CMS-HCC V28 23. A source-labeled RAF reference is available. Confirm the documented diagnosis and applicable coding requirements. MEAT criteria · RAF Calculator · free HCC coding tools

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Code lookupC69.81

FY 2026 Apr update / Neoplasms (C00-D49) / Malignant neoplasms of eye, brain and other parts of central nervous system (C69-C72)

C69.81

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Malignant neoplasm of overlapping sites of right eye and adnexa

Cancer involving multiple overlapping structures of the right eye and surrounding tissues.

Buddy the Bee presenting code insight

Buddy Insight

Right eye and adnexa overlapping malignancy indicates locally advanced cancer spanning multiple ocular and periocular structures.

OverviewRisk ModelsCode BookDocumentationAuditNotesEdition comparison

CMS-HCC V28

HCC 23

Coefficient HCC 23: 0.186 (Community Non-Dual Aged (CNA))

CMS-HCC V24

Historical

Historical

Not used for CY2026 payment

ACA/HHS

HCC 012

Code-level coefficient reference

ESRD/PACE

HCC 12

Code-level coefficient reference

RXHCC

HCC 22

Code-level coefficient reference

Code Book Path

Official
C69Malignant neoplasm of eye and adnexaC69.8Malignant neoplasm of overlapping sites of eye and adnexaC69.81Malignant neoplasm of overlapping sites of right eye and adnexa

Inclusion Terms

Official

No inclusion terms are included in this display for C69.81. Check the code and parent instructions in the Code Book.

Excludes 2

Official

No Excludes 2 notes are included in this display for C69.81. Check the code and parent instructions in the Code Book.

Related Codes

Official
C69.80Malignant neoplasm of overlapping sites of unspecified eye and adnexaC69.82Malignant neoplasm of overlapping sites of left eye and adnexa

Includes

Official

No Includes notes are included in this display for C69.81. Check the code and parent instructions in the Code Book.

Excludes 1

Official
  • malignant neoplasm of connective tissue of eyelid (C49.0)Inherited from C69
  • malignant neoplasm of eyelid (skin) (C43.1-, C44.1-)Inherited from C69
  • malignant neoplasm of optic nerve (C72.3-)Inherited from C69

Code First

Official

No Code First sequencing instructions are included in this display for C69.81. Check the code and parent instructions in the Code Book.

Use Additional

Official

No Use Additional Code instructions are included in this display for C69.81. Check the code and parent instructions in the Code Book.

Code Also

Official

No Code Also instructions are included in this display for C69.81. Check the code and parent instructions in the Code Book.

Buddy Documentation Tip

HCC Buddy guidance
Pathology confirming malignancy spanning multiple right eye/adnexal structures
Documentation confirming right side involvement
Imaging (CT/MRI) documenting all involved structures
Surgical assessment of resectability

MEAT Support

HCC Buddy guidance
Pathology confirming malignancy spanning multiple right eye/adnexal structures
Documentation confirming right side involvement
Imaging (CT/MRI) documenting all involved structures
Surgical assessment of resectability

Audit Caution

HCC Buddy guidance
Laterality errors — critical for surgical planning including possible exenteration
Using a single-structure code when the tumor involves multiple structures
Using unspecified laterality when the right side is documented

Common Mistakes

HCC Buddy guidance
C69.82 — Left eye overlapping sites: verify laterality carefully
C69.61 — Right orbit only: use overlapping code when tumor extends beyond the orbit to involve eye structures
C69.80 — Unspecified eye overlapping sites: use C69.81 when right side is documented
C69.91 — Unspecified site of right eye: use overlapping code when multiple sites are identified

Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →

Is C69.81 an HCC code?

Yes. C69.81 (Malignant neoplasm of overlapping sites of right eye and adnexa) maps to HCC 23, Prostate, Breast, and Other Cancers and Tumors under the CMS-HCC V28 risk adjustment model, with a source-labeled community non-dual aged reference coefficient of 0.186. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes. It is billable for payment year 2026.

Coder answer: C69.81 is billable and maps to V28 HCC 23, Prostate, Breast, and Other Cancers and Tumors. Open it in the Code Book for the tabular path, RAF, and MEAT checklist.

Code
C69.81
Description
Malignant neoplasm of overlapping sites of right eye and adnexa
HCC (V28)
HCC 23 — Prostate, Breast, and Other Cancers and Tumors
RAF reference coefficient
0.186
Billable
Yes
Payment year
2026

HCC Category Mapping

V28HCC 23, Prostate, Breast, and Other Cancers and Tumors
0.186
ESRDHCC 12, Breast/Prostate/and Other Cancers and Tumors
Not separately weighted
RxHCCHCC 22, Prostate, Breast, Bladder, and Other Cancers and Tumors
Not separately weighted

These are source-labeled model coefficients, not member totals. A category may still be removed by hierarchy or model cleanup rules. Weights are not directly comparable across models: CMS-HCC V28 and V24 use Community, Non-Dual, Aged; ESRD uses the dialysis continuing-enrollee model; RxHCC is the Part D continuing-enrollee, non-low-income, aged weight (a larger scale than CMS-HCC). ACA/HHS has no single weight — it varies by metal level. Actual per-patient RAF contribution depends on member context, hierarchy and cleanup rules, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains available for historical review.

Work C69.81 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →

MEAT review for C69.81

For C69.81, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule.

  • MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
  • EEvaluate: test results, medication response, or physical findings reviewed by the provider
  • AAssess: explicit mention in the assessment or plan with acknowledgment of status
  • TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis

Coder workflow notes

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What This Code Means

C69.81 is the ICD-10-CM diagnosis code for malignant neoplasm of overlapping sites of right eye and adnexa. Cancer involving multiple overlapping structures of the right eye and surrounding tissues. C69.81 sits in the ICD-10-CM chapter for neoplasms (c00-d49), within the section covering malignant neoplasms of eye, brain and other parts of central nervous system (c69-c72).

Under the CMS-HCC V28 risk adjustment model, C69.81 maps to Prostate, Breast, and Other Cancers and Tumors (HCC 23) with a source-labeled community, non-dual, aged reference coefficient of 0.186. For CY2026 non-PACE Medicare Advantage, CMS uses 100% of the 2024 CMS-HCC model (V28). PACE uses a separate model blend. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes.

Confirm right side and overlapping sites are documented. For C69.81, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule. When documentation is ambiguous, coders should issue a provider query rather than assume the highest-specificity variant.

HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for C69.81 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

  • •Confirm right side and overlapping sites are documented
  • •Review pathology to identify all involved anatomical structures

Clinical Significance

Right eye and adnexa overlapping malignancy indicates locally advanced cancer spanning multiple ocular and periocular structures. This level of involvement often requires orbital exenteration (removal of all orbital contents) and carries significant functional impact including complete vision loss in the affected eye.

Documentation Requirements

  • ✓Pathology confirming malignancy spanning multiple right eye/adnexal structures
  • ✓Documentation confirming right side involvement
  • ✓Imaging (CT/MRI) documenting all involved structures
  • ✓Surgical assessment of resectability
  • ✓Staging reflecting multi-structure involvement

Commonly Confused Codes

  • •C69.82: Left eye overlapping sites: verify laterality carefully
  • •C69.61: Right orbit only: use overlapping code when tumor extends beyond the orbit to involve eye structures
  • •C69.80: Unspecified eye overlapping sites: use C69.81 when right side is documented
  • •C69.91: Unspecified site of right eye: use overlapping code when multiple sites are identified

Child Codes

C69.80Malignant neoplasm of overlapping sites of unspecified eye and adnexa
HCC 23
C69.81Malignant neoplasm of overlapping sites of right eye and adnexa
HCC 23
C69.82Malignant neoplasm of overlapping sites of left eye and adnexa
HCC 23

Code Hierarchy

└C69Malignant neoplasm of eye and adnexa└C69.8Malignant neoplasm of overlapping sites of eye and adnexa└C69.81Malignant neoplasm of overlapping sites of right eye and adnexa
└C69.81Malignant neoplasm of overlapping sites of right eye and adnexa

Also searched as

  • C69 81
  • C6981

For C69.81, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule.

C69.81 maps to CMS-HCC V28 category 23, Prostate, Breast, and Other Cancers and Tumors. See the ICD-10 to HCC mapping hub for how the V28 crosswalk works. The mapping identifies a payment HCC category for C69.81. Review its source-labeled HCC coefficient above, check the RAF Calculator with complete member context for CMS-HCC V28 PY2026, and confirm the documentation the chart needs before the code is submitted. HCC Buddy shows no RAF score unless every required source and calculation check passes.

Work C69.81 in HCC Buddy

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