Is Q75.8 a billable ICD-10-CM code?

Yes. Q75.8 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does Q75.8 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 Q75.8?

Q75.8 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 Q75.8 (Q75) and apply to it just the same.

Q75.8

Q75.8 — Other specified congenital malformations of skull and face bones

Billable / specific codeICD-10-CMPOA exempt

Q75.8 is a billable, specific ICD-10-CM code for other specified congenital malformations of skull and face bones. It is valid for submission on a claim.

Inclusion terms

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

Absence of skull bone, congenital
Congenital deformity of forehead
Platybasia

Excludes1 inherited from the categories above Q75.8

These are not written on Q75.8, but they bind it: a note on a category applies to every code beneath it. Billing Q75.8 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 Q75.8

These codes carry an Excludes1 note pointing at Q75.8. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading Q75.8 alone.

Q18Other congenital malformations of face and neck

Risk adjustment

Q75.8 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

Q75.8 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 Q75.8 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 Q75.8.

Craniofenestria(skull)
Craniolacunia(skull)
Cranioschisis
Impression, basilar
Lacunar skull
Ostrum-Furst syndrome
Platybasia
Stenocephaly
Absence›skull bone(congenital)
Accessory›face bone(s)
Accessory›frontonasal process
Agenesis›roof of orbit

Code history

Q75.8 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share Q75. If Q75.8 is not quite right, the correct code is usually one of these.

Questions about Q75.8

Is Q75.8 a billable ICD-10-CM code?: Yes. Q75.8 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does Q75.8 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 Q75.8?: Q75.8 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 Q75.8 (Q75) and apply to it just the same.