E79 ICD-10-CM Code: Disorders of purine and pyrimidine metabolism
E79 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · free HCC coding tools
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FY 2026 Apr update / Endocrine, nutritional and metabolic diseases (E00-E89) / Metabolic disorders (E70-E88)
E79
Header CodeICD-10-CMOfficial ICD-10-CMCodebook guidanceDisorders of purine and pyrimidine metabolism
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
N/A—
Not mapped
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
OfficialNo inclusion terms are included in this display for E79. Check the code and parent instructions in the Code Book.
Excludes 2
Official- Ehlers-Danlos syndromes (Q79.6-)Inherited from E70-E88
Related Codes
Includes
OfficialNo Includes notes are included in this display for E79. Check the code and parent instructions in the Code Book.
Excludes 1
Official- Ataxia-telangiectasia (Q87.19)
- Bloom's syndrome (Q82.8)
- Cockayne's syndrome (Q87.19)
- calculus of kidney (N20.0)
- combined immunodeficiency disorders (D81.-)
- Fanconi's anemia (D61.09)
- gout (M1A.-, M10.-)
- orotaciduric anemia (D53.0)
- progeria (E34.8)
- Werner's syndrome (E34.8)
- xeroderma pigmentosum (Q82.1)
- transitory endocrine and metabolic disorders specific to newborn (P70-P74)Inherited from E00-E89, E70-E88
- androgen insensitivity syndrome (E34.5-)Inherited from E00-E89, E70-E88
- congenital adrenal hyperplasia (E25.0)Inherited from E00-E89, E70-E88
- hemolytic anemias attributable to enzyme disorders (D55.-)Inherited from E00-E89, E70-E88
- Marfan syndrome (Q87.4-)Inherited from E00-E89, E70-E88
- 5-alpha-reductase deficiency (E29.1)Inherited from E00-E89, E70-E88
Code First
OfficialNo Code First sequencing instructions are included in this display for E79. Check the code and parent instructions in the Code Book.
Use Additional
OfficialNo Use Additional Code instructions are included in this display for E79. Check the code and parent instructions in the Code Book.
Code Also
OfficialNo Code Also instructions are included in this display for E79. Check the code and parent instructions in the Code Book.
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
- Code
- E79
- Description
- Disorders of purine and pyrimidine metabolism
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF reference coefficient
- —
- Billable
- No
- Payment year
- 2026
Coder workflow notes
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What This Code Means
E79 is the ICD-10-CM diagnosis code for disorders of purine and pyrimidine metabolism. E79 sits in the ICD-10-CM chapter for endocrine, nutritional and metabolic diseases (e00-e89), within the section covering metabolic disorders (e70-e88).
Header codes like E79 cannot be reported on claims directly; they organize child codes that share clinical context. Coders should select the billable child code that matches the documented presentation and then verify its current source-backed HCC mapping. Do not infer a child code or risk adjustment value from the header alone.
HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for E79 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.