Q75.9 — Congenital malformation of skull and face bones, unspecified
Is Q75.9 billable?
Yes, but Q75.9 is an unspecified code. Q75.9 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, Q75.9 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting Q75.9 — the more specific alternatives are listed below.
Q75.9 at a glance
| Code | Q75.9 |
|---|---|
| Description | Congenital malformation of skull and face bones, unspecified |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does Q75.9 group to?
Q75.9 sits in MDC 08 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 564Other Musculoskeletal System and Connective Tissue Diagnoses with MCCmedical
- 565Other Musculoskeletal System and Connective Tissue Diagnoses with CCmedical
- 566Other Musculoskeletal System and Connective Tissue Diagnoses without CC/MCCmedical
How is Q75.9 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to Q75.9. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Anomaly, anomalous › skull (congenital) (unspecified type)
- Anomaly, anomalous › bone › face (congenital) (unspecified type)
- Anomaly, anomalous › bone › skull (congenital) (unspecified type)
- Anomaly, anomalous › face › bone (congenital) (unspecified type)
- Malformation › bone › face (congenital)
- Malformation › bone › skull (congenital)
Inclusion terms
Alternative wording in documentation that is classified to Q75.9.
- Congenital anomaly of face bones NOS
- Congenital anomaly of skull NOS
Excludes1 — never code together — inherited from Q75
The conditions below can never be reported together with Q75.9 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- 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)
Excludes2 — not included here — inherited from Chapter 17
The conditions below are not part of Q75.9, but a patient may have both at the same time. When documentation supports it, Q75.9 and the excluded code may both be reported.
- inborn errors of metabolism (E70-E88)
How long has Q75.9 existed?
Q75.9 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.