Disorders of purine and pyrimidine metabolism
In Metabolic disorders (E70-E88), chapter 4: Endocrine, Nutritional and Metabolic Diseases
7 billable codes under E79: 6 are a CC; 1 map to HCC 50 (Amyloidosis, Porphyria, and Other Specified Metabolic Disorders).A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment. An HCC counts toward a Medicare Advantage patient's risk score.
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Instructional notes
Excludes1: not coded here, use a different code
Also applies, from Metabolic disorders (E70-E88)
These notes sit on E70-E88 and apply to every code under it, including E79.
Excludes1: not coded here, use a different code
Excludes2: not included here, code separately if applicable
- Ehlers-Danlos syndromes (Q79.6-)
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers diabetes mellitus coding, including type, insulin and drug use, pump malfunction and secondary diabetes, plus obesity and obesity class codes.
- Diabetes mellitus (page 39)
- Obesity (page 42)
All codes under E79
E79 can't be used on a claim. Pick a billable code below; grey headings group them.
- E79.0Hyperuricemia without signs of inflammatory arthritis and tophaceous disease
- E79.1Lesch-Nyhan syndrome
- E79.2Myoadenylate deaminase deficiency
- E79.8Other disorders of purine and pyrimidine metabolism
- E79.81Aicardi-Goutieres syndrome
- E79.82Hereditary xanthinuria
- E79.89Other specified disorders of purine and pyrimidine metabolism
- E79.9Disorder of purine and pyrimidine metabolism, unspecified
E79 MS-DRGs
As the principal diagnosis, the billable codes under E79 group to MS-DRG 642, 947, or 948 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
- DRG 642 Inborn and Other Disorders of Metabolism (6 of 7 codes)
- DRG 947 Signs and Symptoms with MCC (1 of 7 codes)
- DRG 948 Signs and Symptoms without MCC (1 of 7 codes)
Other codes that refer to E79
Notes on these codes point to E79.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Metabolic Disorders
Metabolism is the process your body uses to get or make energy from the food you eat. Food is made up of proteins, carbohydrates, and fats. Chemicals in your digestive system break the food parts down into sugars and acids, your body's fuel. Your body can use this fuel right away, or it can store the energy in your body tissues, such as your liver, muscles, and body fat.
Read more about metabolic disorders on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.