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M77.12 — Lateral epicondylitis, left elbow
M77.12
What this code means
Lateral epicondylitis ('tennis elbow') of the left elbow: pain at the outer elbow from the forearm tendon attachment.
Also called: tennis elbow left.
When this code is used
Used for lateral epicondylitis, left elbow.
Where it sits in ICD-10-CM
Code M77.12 belongs to Chapter 13: Diseases of the musculoskeletal system and connective tissue, which covers codes M00–M99 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.
Related symptoms
Frequently asked questions
What is ICD-10-CM code M77.12?
M77.12 is the ICD-10-CM diagnosis code for “Lateral epicondylitis, left elbow”. Lateral epicondylitis ('tennis elbow') of the left elbow: pain at the outer elbow from the forearm tendon attachment.
When is code M77.12 used?
Used for lateral epicondylitis, left elbow. It belongs to Chapter 13 of ICD-10-CM (Diseases of the musculoskeletal system and connective tissue).
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.