M27.40
✓ BillableUnspecified cyst of jaw
Diseases of the musculoskeletal system and connective tissue (M00-M99)
Also Known As
❌ Excludes1
inheritedRules inherited from parent codes in the hierarchy.
- • cysts of oral region (K09.-)
- • latent bone cyst of jaw (M27.0)
- • Stafne's cyst (M27.0)
Clinical Description
ICD-10-CM code M27.40 represents unspecified cyst of jaw. This code falls under the Diseases of the musculoskeletal system and connective tissue (M00-M99) classification. It is a billable/specific code valid for HIPAA-covered transactions as of October 1, 2025 (FY2026). This code can be used to indicate a diagnosis for reimbursement purposes on insurance claims.
This is a 6-character code at the 5th level of specificity. This is the most specific code available in this subcategory. Coders should note that M27.40 has 3 Excludes1 restriction(s) — codes that cannot be reported together on the same claim.
Frequently Asked Questions
What is ICD-10 code M27.40?
ICD-10-CM code M27.40 is "Unspecified cyst of jaw". It belongs to the category: Diseases of the musculoskeletal system and connective tissue (M00-M99).
Is M27.40 a billable ICD-10 code?
Yes, M27.40 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
What codes are excluded with M27.40?
M27.40 has 3 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.
Related Codes in M27.4
Other codes in the same category that may be relevant for differential coding:
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Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)