M27.4 – Other and unspecified cysts of jaw

ICD-10-CM 2027 diagnosis code · Dentofacial anomalies [including malocclusion] and other disorders of jaw

Non-billable header

ICD-10-CM code M27.4

Code: M27.4 (claims format: M274)
Description: Other and unspecified cysts of jaw
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 13. Diseases of the musculoskeletal system and connective tissue (M00-M99)
Block: M26-M27 Dentofacial anomalies [including malocclusion] and other disorders of jaw
Parent codes: M27

Billable codes under M27.4

M27.4 is a header code and cannot be used on claims. Choose the most specific code:

M27.40 – Unspecified cyst of jawBillable
M27.49 – Other cysts of jawBillable

Notes for M27.4

Excludes1 (not coded here):

cysts of oral region (K09.-)
latent bone cyst of jaw (M27.0)
Stafne's cyst (M27.0)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block M26-M27

Excludes1 (not coded here):

hemifacial atrophy or hypertrophy (Q67.4)
unilateral condylar hyperplasia or hypoplasia (M27.8)

Related codes in M27

M27.0 – Developmental disorders of jawsBillable
M27.1 – Giant cell granuloma, centralBillable
M27.2 – Inflammatory conditions of jawsBillable
M27.3 – Alveolitis of jawsBillable
M27.5 – Periradicular pathology associated with previous endodontic treatmentHeader
M27.6 – Endosseous dental implant failureHeader
M27.8 – Other specified diseases of jawsBillable
M27.9 – Disease of jaws, unspecifiedBillable

Frequently asked questions

What is ICD-10 code M27.4?

M27.4 is the ICD-10-CM code for other and unspecified cysts of jaw, in the block M26-M27 (Dentofacial anomalies [including malocclusion] and other disorders of jaw).

Is M27.4 a billable code?

No. M27.4 is a header code with more specific child codes; report one of the billable codes listed above.

What category does M27.4 belong to?

It belongs to category M27 – Other diseases of jaws.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.