K56.50
BillableIntestinal adhesions [bands], unspecified as to partial versus complete obstruction
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is K56.50 an HCC code?
Yes. K56.50 maps to Intestinal Obstruction/Perforation under the CMS-HCC V28 risk adjustment model (and Intestinal Obstruction/Perforation 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 K56.50
For K56.50to 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 K56.50 during that encounter — not just copy-forwarded from a problem list.
What This Code Means
K56.50 is the ICD-10-CM diagnosis code for intestinal adhesions [bands], unspecified as to partial versus complete obstruction. Scar tissue bands in the intestine that cause blockage, but it is unclear whether the obstruction is partial or complete. Adhesions commonly form after abdominal surgery. K56.50 sits in the ICD-10-CM chapter for diseases of the digestive system (k00-k95), within the section covering other diseases of intestines (k55-k64).
Under the CMS-HCC V28 risk adjustment model, K56.50 maps to Intestinal Obstruction/Perforation (HCC 78) with a community, non-dual, aged base RAF weight of 0.000. Under the older V24 model, K56.50 mapped to the same category but with a base RAF weight of 0.226 — V28 recalibrated weights across the entire model. 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.
When the degree of obstruction (partial vs. complete) is not documented, use this unspecified code. Because K56.50 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 K56.50 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
Clinical Significance
K56.50 represents intestinal adhesions causing obstruction where the degree of obstruction (partial vs complete) is not specified. Adhesions are fibrous bands that commonly develop after abdominal surgery and can cause recurrent bowel obstruction episodes, requiring careful management and potentially repeat surgical intervention.
Documentation Requirements
- ✓Documentation of adhesive bands causing intestinal obstruction
- ✓History of previous abdominal surgery or peritonitis
- ✓Imaging studies showing dilated bowel with adhesive changes
- ✓Clinical presentation consistent with bowel obstruction
- ✓Documentation that degree of obstruction is unclear
- ✓Conservative vs surgical management approach
- ✓Assessment of bowel viability
- ✓Documentation of recurrent nature if applicable
Commonly Confused Codes
- •K56.51 — Intestinal adhesions with partial obstruction (when degree is specified as partial)
- •K56.52 — Intestinal adhesions with complete obstruction (when degree is specified as complete)
- •K66.0 — Peritoneal adhesions (adhesions without current obstruction)
- •K56.60 — Partial intestinal obstruction unspecified cause (when adhesions not documented as cause)
- •K91.30 — Postprocedural intestinal obstruction (when clearly post-operative rather than adhesional)