D82.2
BillableImmunodeficiency with short-limbed stature
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is D82.2 an HCC code?
Yes. D82.2 maps to Disorders of Immunity under the V24 model but is not retained in V28.
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 D82.2
For D82.2 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 D82.2 during that encounter — not just copy-forwarded from a problem list.
What This Code Means
D82.2 is the ICD-10-CM diagnosis code for immunodeficiency with short-limbed stature. A rare genetic condition where the immune system is weakened and the person has unusually short limbs and stature. D82.2 sits in the ICD-10-CM chapter for diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (d50-d89), within the section covering certain disorders involving the immune mechanism (d80-d89).
Under the older CMS-HCC V24 model, D82.2 maps to Disorders of Immunity (HCC 47) with a community, non-dual, aged base RAF weight of 0.472. 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 code represents a specific syndrome; document the short stature findings and immunodeficiency manifestations separately if needed. Because D82.2 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 D82.2 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •This code represents a specific syndrome; document the short stature findings and immunodeficiency manifestations separately if needed
- •Verify the diagnosis includes both immunodeficiency AND short-limbed stature to distinguish from other immunodeficiency disorders
Clinical Significance
Immunodeficiency with short-limbed stature, also known as cartilage-hair hypoplasia or short-limbed immune deficiency, is a rare autosomal recessive disorder caused by RMRP gene mutations. It combines skeletal dysplasia with variable immunodeficiency ranging from mild lymphopenia to severe combined immunodeficiency, and carries increased risk of malignancy, particularly non-Hodgkin lymphoma and skin cancers.
Documentation Requirements
- ✓Documentation must include genetic testing confirming RMRP mutation, skeletal survey showing metaphyseal dysplasia and short limbs, immunological assessment (lymphocyte subsets, immunoglobulin levels, vaccine responses), growth parameters, and cancer surveillance plan.
- ✓Document the specific severity of immune impairment and any associated features such as Hirschsprung disease or anemia.