T86.852
BillableIntestine transplant infection
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is T86.852 an HCC code?
Yes. T86.852 maps to Intestine Transplant Status/Complications under the CMS-HCC V28 risk adjustment model (and Major Organ Transplant or Replacement Status 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 T86.852
For T86.852 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 T86.852 during that encounter — not just copy-forwarded from a problem list.
What This Code Means
T86.852 is the ICD-10-CM diagnosis code for intestine transplant infection. An infection develops in or around a transplanted intestine. T86.852 sits in the ICD-10-CM chapter for injury, poisoning and certain other consequences of external causes (s00-t88), within the section covering complications of surgical and medical care, not elsewhere classified (t80-t88).
Under the CMS-HCC V28 risk adjustment model, T86.852 maps to Intestine Transplant Status/Complications (HCC 77) with a community, non-dual, aged base RAF weight of 0.000. Under the older CMS-HCC V24 model, T86.852 maps to Major Organ Transplant or Replacement Status (HCC 186) with a community, non-dual, aged base RAF weight of 0.910. 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 coding this, also identify and code the specific infectious organism if documented (e.g., bacterial, viral, fungal). Because T86.852 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 T86.852 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •When coding this, also identify and code the specific infectious organism if documented (e.g., bacterial, viral, fungal)
- •This complication is common in intestinal transplant recipients due to immunosuppression and the intestine's bacterial flora
Clinical Significance
Intestinal transplant infection represents a serious complication in immunocompromised patients that can lead to sepsis, graft loss, and death. These infections often require hospitalization and aggressive antimicrobial therapy.
Documentation Requirements
- ✓Documentation of intestinal transplant history
- ✓Clinical evidence of infection (fever, abdominal pain, diarrhea)
- ✓Positive culture results or microbiologic evidence
- ✓Laboratory markers of infection (elevated WBC, inflammatory markers)
- ✓Imaging findings if applicable
- ✓Antimicrobial therapy administration
- ✓Provider assessment linking infection to transplant status
- ✓Specific pathogen identification when possible
Use Additional Code
- code to specify infection
Commonly Confused Codes
- •T86.850 — intestine transplant rejection (infectious vs immunologic)
- •T86.851 — intestine transplant failure (infection vs overall failure)
- •K59.1 — diarrhea (transplant infection vs other causes)
- •A41.9 — sepsis unspecified (transplant-related vs community-acquired sepsis)
- •T86.858 — other intestine transplant complications (infection vs other)