E34.5 vs E73

E34.5 (Androgen insensitivity syndrome) compared with E73 (Lactose intolerance), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.

Can these codes be reported together?

No — do not report together. E73 carries an Excludes1 note covering E34.5: “androgen insensitivity syndrome (E34.5-)”

Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Side by side

	E34.5Androgen insensitivity syndrome	E73Lactose intolerance
Billing status	Non-billable header Report instead: E34.50, E34.51, E34.52	Non-billable header Report instead: E73.0, E73.1, E73.8, E73.9
Classification	E00-E89 — Endocrine, Nutritional and Metabolic Diseases (E00-E89)	E00-E89 — Endocrine, Nutritional and Metabolic Diseases (E00-E89)
Definition	Androgen insensitivity syndrome is a non-billable ICD-10-CM category code (E34.5).	Lactose intolerance is a non-billable ICD-10-CM category code (E73).

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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