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A69.20 — Lyme disease, unspecified
A69.20
What this code means
Lyme disease is an infection spread by tick bites, often starting with an expanding round rash.
Also called: lyme disease.
When this code is used
Used for Lyme disease without further specification of complications.
Where it sits in ICD-10-CM
Code A69.20 belongs to Chapter 1: Infectious and parasitic diseases, which covers codes A00–B99 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.
Related symptoms
Watch: related videos
Frequently asked questions
What is ICD-10-CM code A69.20?
A69.20 is the ICD-10-CM diagnosis code for “Lyme disease, unspecified”. Lyme disease is an infection spread by tick bites, often starting with an expanding round rash.
When is code A69.20 used?
Used for Lyme disease without further specification of complications. It belongs to Chapter 1 of ICD-10-CM (Infectious and parasitic diseases).
This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.