C7A.096
BillableMalignant carcinoid tumor of the hindgut, unspecified
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is C7A.096 an HCC code?
Yes. C7A.096 maps to Lymphoma and Other 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 C7A.096
For C7A.096to 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 C7A.096 during that encounter — not just copy-forwarded from a problem list.
What This Code Means
C7A.096 is the ICD-10-CM diagnosis code for malignant carcinoid tumor of the hindgut, unspecified. A rare cancer of hormone-producing cells in the lower digestive tract (hindgut region including colon and rectum) when the exact location is not specified. C7A.096 sits in the ICD-10-CM chapter for neoplasms (c00-d49), within the section covering malignant neuroendocrine tumors (c7a).
Under the CMS-HCC V28 risk adjustment model, C7A.096 maps to Lymphoma and Other Cancers (HCC 21) with a community, non-dual, aged base RAF weight of 0.671. Under the older CMS-HCC V24 model, C7A.096 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.
Hindgut carcinoid is a classification category; if specific site is documented, use more specific codes (C7A.020-C7A.029). Because C7A.096 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 C7A.096 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Hindgut carcinoid is a classification category; if specific site is documented, use more specific codes (C7A.020-C7A.029)
- •Hindgut carcinoids typically have better prognosis than foregut tumors; document stage and grade when available
Clinical Significance
Malignant carcinoid tumor of the hindgut represents a neuroendocrine malignancy arising from hindgut-derived structures (distal transverse colon, descending colon, sigmoid, and rectum) when the specific segment is not documented. Hindgut carcinoids rarely produce serotonin and are less likely to cause carcinoid syndrome compared to midgut tumors. Rectal carcinoids are the most common hindgut carcinoid and are often discovered incidentally during colonoscopy.
Documentation Requirements
- ✓Pathology confirming neuroendocrine/carcinoid histology
- ✓Documentation explaining why the specific hindgut segment cannot be identified
- ✓Tumor size (critical for rectal carcinoids — tumors less than 1 cm have excellent prognosis)
- ✓Depth of invasion and lymphovascular invasion status
- ✓Ki-67 proliferation index and tumor grade
- ✓Surveillance colonoscopy schedule
Commonly Confused Codes
- •C7A.020-C7A.029 — Site-specific large intestine carcinoid codes: Use these when the specific colon segment or rectum is documented
- •C7A.095 — Malignant carcinoid tumor of the midgut, unspecified: Midgut includes proximal colon through hepatic flexure
- •C20 — Malignant neoplasm of rectum: Use for adenocarcinoma of the rectum, not carcinoid
- •D3A.029 — Benign carcinoid tumor of the large intestine: Use for confirmed benign behavior