ICD-9-CM diagnosis code (retired)
279.2 — Combined immunity deficiency
About ICD-9-CM 279.2
279.2 is an ICD-9-CM diagnosis code for combined immunity deficiency. ICD-9-CM was retired for U.S. claims on October 1, 2015, when ICD-10-CM took over.
The CMS General Equivalence Mappings translate it to 5 ICD-10-CM codes, such as D81.0 (Severe combined immunodeficiency [SCID] with reticular dysgenesis), D81.1 (Severe combined immunodeficiency [SCID] with low T- and B-cell numbers) and D81.2 (Severe combined immunodeficiency [SCID] with low or normal B-cell numbers). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
- D81.0Severe combined immunodeficiency [SCID] with reticular dysgenesisapproximate
- D81.1Severe combined immunodeficiency [SCID] with low T- and B-cell numbersapproximate
- D81.2Severe combined immunodeficiency [SCID] with low or normal B-cell numbersapproximate
- D81.89Other combined immunodeficienciesapproximate
- D81.9Combined immunodeficiency, unspecifiedapproximate
Common questions about 279.2
GEMs are a translation aid, not a substitute for coding from the record. The 2027 ICD-10 code set has changed since the last GEMs release in 2018. Page updated September 29, 2026.