E73.1: Secondary lactase deficiency
E73.1 is the billable ICD-10-CM diagnosis code for Secondary lactase deficiency. It is a fully specified code, so it can be reported on a claim (subject to clinical documentation and your payer's rules).
Frequently asked questions
What is ICD-10-CM code E73.1?
E73.1 is the ICD-10-CM diagnosis code for Secondary lactase deficiency. It belongs to category E73 (Lactose intolerance).
Is E73.1 a billable code?
Yes. E73.1 is a billable, fully specified ICD-10-CM code, so it can be used on a claim (subject to documentation and payer rules).
What category does E73.1 belong to?
E73.1 is part of ICD-10-CM category E73 — Lactose intolerance, which has 8 billable codes.
More free billing tools: all ICD-10 categories · ICD-10 search · denial codes · Medicare fees
Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
Code the diagnosis right
Join providers across the country delivering modern virtual care with CareNiva. Free to start, ready in minutes.
100% Satisfaction Guaranteed — try it risk-free