E80 vs Q79.6

E80 (Disorders of porphyrin and bilirubin metabolism) compared with Q79.6 (Ehlers-Danlos syndromes), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).

Can these codes be reported together?

Yes, when both are documented. E80 carries an Excludes2 note covering Q79.6: “Ehlers-Danlos syndromes (Q79.6-)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

Side by side

	E80Disorders of porphyrin and bilirubin metabolism	Q79.6Ehlers-Danlos syndromes
Billing status	Non-billable header Report instead: E80.0, E80.1, E80.20, E80.21, E80.29	Non-billable header Report instead: Q79.60, Q79.61, Q79.62, Q79.63, Q79.69
Classification	E00-E89 — Endocrine, Nutritional and Metabolic Diseases (E00-E89)	Q00-Q99 — Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99)
Definition	Disorders of porphyrin and bilirubin metabolism is a non-billable ICD-10-CM category code (E80).	Ehlers-Danlos syndromes is a non-billable ICD-10-CM category code (Q79.6).
Includes	defects of catalase and peroxidase	—

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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources