Is Q75.009 a billable ICD-10-CM code?

Yes. Q75.009 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does Q75.009 sit in the tabular list?

Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Congenital malformations and deformations of the musculoskeletal system (Q65-Q79).

What cannot be coded together with Q75.009?

Q75.009 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above Q75.009 (Q75) and apply to it just the same.

Q75.009

Q75.009 — Craniosynostosis, unspecified

Billable / specific codeICD-10-CMPOA exempt

Q75.009 is a billable, specific ICD-10-CM code for craniosynostosis, unspecified. It is valid for submission on a claim.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Imperfect fusion of skull

Excludes1 inherited from the categories above Q75.009

These are not written on Q75.009, but they bind it: a note on a category applies to every code beneath it. Billing Q75.009 with anything listed here is a denial.

Written on Q75 — Other congenital malformations of skull and face bones

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)

Other codes that can never be billed with Q75.009

These codes carry an Excludes1 note pointing at Q75.009. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading Q75.009 alone.

Q18Other congenital malformations of face and neck

Risk adjustment

Q75.009 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

Q75.009 is named in 2 Medicare coverage policies — 2 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A56612Billing and Coding: CT of the Head
A57204Billing and Coding: MRI and CT Scans of the Head and Neck

How Q75.009 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to Q75.009.

Acrocephaly
Craniostenosis
Craniosynostosis
Oxycephaly, oxycephalic
Closure›cranial sutures, premature
Deficiency, deficient›craniofacial axis
Ossification›fontanel, premature
Imperfect›closure›skull

Code history

What changed, and when. Derived by diffing consecutive CMS release files — which matters when you are defending a code assigned under an earlier edition.

revisedFY2024-FY2026
Craniosynostosis unspecified → Craniosynostosis, unspecified

Related codes at this level

Codes that share Q75.00. If Q75.009 is not quite right, the correct code is usually one of these.

Questions about Q75.009

Is Q75.009 a billable ICD-10-CM code?: Yes. Q75.009 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does Q75.009 sit in the tabular list?: Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Congenital malformations and deformations of the musculoskeletal system (Q65-Q79).
What cannot be coded together with Q75.009?: Q75.009 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above Q75.009 (Q75) and apply to it just the same.