C69.40
BillableMalignant neoplasm of unspecified ciliary body
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is C69.40 an HCC code?
Yes. C69.40 maps to Melanoma and Other Skin Cancers under the CMS-HCC V28 risk adjustment model (and Breast, Prostate, and Other Cancers and Tumors under V24).
HCC Category Mapping
RAF weights shown are the community, non-dual, aged base weights from the CMS risk adjustment model file. Actual per-patient RAF contribution depends on member segment, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains in use during the transition and for historical data.
MEAT Criteria for C69.40
For C69.40 to count as a valid HCC diagnosis in a given encounter, the provider's documentation must show MEAT: Monitor, Evaluate, Assess, or Treat. A diagnosis from a prior year does not carry forward automatically — it has to be re-documented and supported each calendar year.
- 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
Only one of M/E/A/T is required to support the code, but the documentation must be specific enough to show that the provider actually addressed C69.40 during that encounter — not just copy-forwarded from a problem list.
What This Code Means
C69.40 is the ICD-10-CM diagnosis code for malignant neoplasm of unspecified ciliary body. This code describes cancer that has developed in the ciliary body, which is a part of the eye that helps control the lens and produces fluid inside the eye. The specific location within the ciliary body is not specified in the medical record. C69.40 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, C69.40 maps to Melanoma and Other Skin Cancers (HCC 23) with a community, non-dual, aged base RAF weight of 0.251. Under the older CMS-HCC V24 model, C69.40 maps to Breast, Prostate, and Other Cancers and Tumors (HCC 12) with a community, non-dual, aged base RAF weight of 0.150. V28 is the CMS-HCC risk adjustment model that reached 100% phase-in for payment year 2026, replacing V24 which was used during the PY2024–PY2025 transition.
If the medical record specifies the exact location within the ciliary body (such as a specific quadrant or region), use a more specific code like C69.41, C69.42, or C69.43 instead of the unspecified code C69.40. Because C69.40 maps to a payment HCC, the provider's documentation must satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) for the encounter to count toward the patient's Medicare Advantage risk adjustment score. 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, RAF weights, and MEAT documentation criteria for C69.40 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •If the medical record specifies the exact location within the ciliary body (such as a specific quadrant or region), use a more specific code like C69.41, C69.42, or C69.43 instead of the unspecified code C69.40
- •Ensure laterality is documented separately using the appropriate 7th character extension (1 for right eye, 2 for left eye, 3 for bilateral) when applicable to your coding system
Clinical Significance
Ciliary body malignancy, typically melanoma, is a uveal tract cancer that can disrupt aqueous humor production and lens accommodation. It is less common than choroidal melanoma but carries similar metastatic risk. Ciliary body involvement is an adverse prognostic factor in uveal melanoma staging, making its documentation particularly important.
Documentation Requirements
- ✓Pathology or clinical findings confirming ciliary body malignancy
- ✓Laterality — query required since this unspecified code indicates missing documentation
- ✓Ultrasound biomicroscopy or imaging confirming ciliary body origin
- ✓Assessment for secondary glaucoma or lens subluxation
- ✓AJCC staging noting ciliary body involvement (which upgrades T category)
Commonly Confused Codes
- •C69.41/C69.42 — Right/left ciliary body: use laterality-specific codes when the affected eye is documented
- •C69.30-C69.32 — Choroidal malignancy: ciliary body is anterior to the choroid; large tumors may involve both structures
- •C69.00-C69.02 — Conjunctival malignancy: completely different anatomical location (external versus internal eye)
- •D31.40-D31.42 — Benign neoplasm of ciliary body: confirm malignancy before coding