ICD-10-CM 2027 diagnosis code
E79.2Myoadenylate deaminase deficiency
E79.2 is a valid, billable ICD-10-CM code for myoadenylate deaminase deficiency. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About E79.2
E79.2 is the ICD-10-CM diagnosis code for Myoadenylate deaminase deficiency. It belongs to category E79 (disorders of purine and pyrimidine metabolism), block E70-E88 (metabolic disorders) and chapter 4 (endocrine, nutritional and metabolic diseases). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within E79 (disorders of purine and pyrimidine metabolism), E79.2 is specifically for Myoadenylate deaminase deficiency. Related codes cover Hyperuricemia without signs of inflammatory arthritis and tophaceous disease (E79.0), Lesch-Nyhan syndrome (E79.1), other disorders of purine and pyrimidine metabolism (E79.8) and disorder of purine and pyrimidine metabolism, unspecified (E79.9).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 642 (Inborn and Other Disorders of Metabolism, relative weight 1.3219), in MDC 10 (Endocrine, Nutritional and Metabolic Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Before ICD-10, this condition was coded in ICD-9-CM as 277.2 (other disorders of purine and pyrimidine metabolism).
Notes that apply from higher levels
Instructions written at a parent level also apply to E79.2.
› From E79 Disorders of purine and pyrimidine metabolism
Broader instructions also apply from E70-E88 Metabolic disorders and Chapter 4: Endocrine, nutritional and metabolic diseases.
Alphabetic index entries
1 entriesTerms in the official ICD-10-CM index that lead to E79.2.
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 10 · Endocrine, Nutritional and Metabolic Diseases and Disorders
ICD-9-CM equivalent
Converter →- 277.2Other disorders of purine and pyrimidine metabolismapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about E79.2
Is E79.2 billable?
- Yes. E79.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can E79.2 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict E79.2 as a principal diagnosis.
Is E79.2 a CC or MCC?
- E79.2 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.
What DRG does E79.2 group to?
- E79.2 is used in the MS-DRG v44.0 logic for MS-DRG 642 (Inborn and Other Disorders of Metabolism). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.
What is the ICD-9 code for E79.2?
- The CMS General Equivalence Mappings map E79.2 to ICD-9-CM 277.2.