HCC Buddy Code Card
Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.
FY 2026 Apr update / Diseases of the digestive system (K00-K95) / Other diseases of the digestive system (K90-K95)
K94.00
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceColostomy complication, unspecified
A problem or complication related to a colostomy (surgically created opening in the colon) that is not further specified.
Buddy Insight
Unspecified colostomy complications represent problems with surgically created colonic stomas that require ongoing medical management and monitoring.
CMS-HCC V28
MappedHCC 463
RAF 0.233
CMS-HCC V24
MappedHCC 188
RAF 0.570
ACA/HHS
00
RAF 0
ESRD/PACE
MappedHCC 188
RAF 0.0
RXHCC
00
RAF 0
Code Trumping
Basket needed
Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for K94.00 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for K94.00 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for K94.00 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for K94.00 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for K94.00 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for K94.00 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for K94.00 in this effective period.
Buddy Documentation Tip
MEAT Support
Audit Caution
Common Mistakes
Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.
Is K94.00 an HCC code?
Yes. K94.00 maps to Artificial Openings for Feeding or Elimination under the CMS-HCC V28 risk adjustment model (and Artificial Openings for Feeding or Elimination 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 K94.00
For K94.00to 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 K94.00 during that encounter — not just copy-forwarded from a problem list.
What This Code Means
K94.00 is the ICD-10-CM diagnosis code for colostomy complication, unspecified. A problem or complication related to a colostomy (surgically created opening in the colon) that is not further specified. K94.00 sits in the ICD-10-CM chapter for diseases of the digestive system (k00-k95), within the section covering other diseases of the digestive system (k90-k95).
Under the CMS-HCC V28 risk adjustment model, K94.00 maps to Artificial Openings for Feeding or Elimination (HCC 463) with a community, non-dual, aged base RAF weight of 0.233. Under the older V24 model, K94.00 mapped to the same category but with a base RAF weight of 0.570 — 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.
This is a non-specific code; attempt to identify the specific complication (hemorrhage, infection, malfunction) from clinical documentation. Because K94.00 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 K94.00 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •This is a non-specific code; attempt to identify the specific complication (hemorrhage, infection, malfunction) from clinical documentation
- •Review operative reports and post-operative notes to determine the exact nature of the complication
Clinical Significance
Unspecified colostomy complications represent problems with surgically created colonic stomas that require ongoing medical management and monitoring. These complications can significantly impact patient quality of life and may require surgical revision or intensive medical intervention.
Documentation Requirements
- ✓Presence of colostomy documented
- ✓Evidence of complication affecting the colostomy
- ✓Clinical presentation of the complication
- ✓Impact on stoma function
- ✓Treatment interventions attempted or planned
- ✓Documentation of why complication type is unspecified
- ✓Assessment of stoma viability and function
- ✓Patient symptoms related to complication