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ICD-10-CM 2027 diagnosis code

Q75.00Craniosynostosis, unspecified

Not billable — use a more specific code

Q75.00 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.

Code last changed in FY2026 (effective October 1, 2025). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About Q75.00

Q75.00 is the ICD-10-CM diagnosis code for craniosynostosis, unspecified. It belongs to category Q75 (other congenital malformations of skull and face bones), block Q65-Q79 (congenital malformations and deformations of the musculoskeletal system) and chapter 17 (congenital malformations, deformations, chromosomal abnormalities, and genetic disorders). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within Q75.0, choose Q75.00 (unspecified) only when documentation doesn't support a more specific option: Sagittal craniosynostosis (Q75.01), Coronal craniosynostosis (Q75.02), Metopic craniosynostosis (Q75.03), Lambdoid craniosynostosis (Q75.04), multi-suture craniosynostosis (Q75.05) and other single-suture craniosynostosis (Q75.08).

To report this condition, pick the subcode that matches the documentation: Q75.001 (type, unilateral), Q75.002 (type, bilateral) and Q75.009 (unspecified).

It was added in FY2024, effective October 1, 2023, and changed in FY2026.

Specific codes under Q75.00

Coding notes

Applicable toConditions and synonyms classified to this code
  • Craniosynostosis NOS

Notes that apply from higher levels

Instructions written at a parent level also apply to Q75.00.

› From Q75 Other congenital malformations of skull and face bones
Excludes1
  • congenital malformation of face NOS (Q18.-)
  • congenital malformation syndromes classified to Q87.-
  • dentofacial anomalies [including malocclusion] (M26.-)
  • musculoskeletal deformities of head and face (Q67.0-Q67.4)
  • skull defects associated with congenital anomalies of brain such as:
  • anencephaly (Q00.0)
  • encephalocele (Q01.-)
  • hydrocephalus (Q03.-)
  • microcephaly (Q02)

Broader instructions also apply from Chapter 17: Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2024 (effective 10/1/2023): Added
  • FY2026 (effective 10/1/2025): Title revised — was “Craniosynostosis unspecified”

Common questions about Q75.00

Is Q75.00 billable?

No. Q75.00 is a header code. Report one of its more specific subcodes instead.