Alphabetic Index FY2027

M27.49

Other cysts of jaw

FY2027Chapter 13: Diseases of the musculoskeletal system and connective tissue/M26–M27 Dentofacial anomalies [including malocclusion] and other disorders of jaw

BillableComplete code, valid to report

M27.49 (also written M2749) is a billable ICD-10-CM diagnosis code for other cysts of jaw. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 16 codes in category M27 (Other diseases of jaws). The Alphabetic Index lists it under 10 entries. Its coding notes include 5 Excludes1 entries and 10 Excludes2 entries.

Excludes1

Not coded here. The listed conditions generally should not be reported together.

Inherited from M27.4 Other and unspecified cysts of jaw
  • cysts of oral region (K09.-)
  • latent bone cyst of jaw (M27.0)
  • Stafne's cyst (M27.0)
Also from chapter/block level (2 notes)
Inherited from M26–M27 Dentofacial anomalies [including malocclusion] and other disorders of jaw
  • hemifacial atrophy or hypertrophy (Q67.4)
  • unilateral condylar hyperplasia or hypoplasia (M27.8)

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

Also from chapter/block level (10 notes)
Inherited from Chapter 13 Diseases of the musculoskeletal system and connective tissue
  • arthropathic psoriasis (L40.5-)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • compartment syndrome (traumatic) (T79.A-)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Inclusion terms

Conditions classified to this code.

This code
  • Aneurysmal cyst of jaw
  • Hemorrhagic cyst of jaw
  • Traumatic cyst of jaw

Notes

Also from chapter/block level (1 note)
Inherited from Chapter 13 Diseases of the musculoskeletal system and connective tissue
  • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition

Alphabetic Index terms

Terms the official Alphabetic Index lists for this code. 10 entries