Q78.8 — Other specified osteochondrodysplasias
Is Q78.8 billable?
Yes, but Q78.8 is an unspecified code. Q78.8 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, Q78.8 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 Q78.8 — the more specific alternatives are listed below.
Q78.8 at a glance
| Code | Q78.8 |
|---|---|
| Description | Other specified osteochondrodysplasias |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does Q78.8 group to?
Q78.8 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 Q78.8 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to Q78.8. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Caffey's syndrome
- Leri's pleonosteosis
- Osteopathia condensans disseminata
- Osteopoikilosis
- Stippled epiphyses
- Synostosis (congenital)
- Abnormal, abnormality, abnormalities › synchondrosis
- Chondrodysplasia › metaphyseal
- Dysplasia › craniometaphyseal
- Hypoplasia, hypoplastic › cartilage hair
- Osteochondrodysplasia › specified NEC
- Segmentation, incomplete › bone NEC (congenital)
Inclusion terms
Alternative wording in documentation that is classified to Q78.8.
- Osteopoikilosis
Excludes2 — not included here — inherited from Chapter 17
The conditions below are not part of Q78.8, but a patient may have both at the same time. When documentation supports it, Q78.8 and the excluded code may both be reported.
- inborn errors of metabolism (E70-E88)
Excludes2 — not included here — inherited from Q78
The conditions below are not part of Q78.8, but a patient may have both at the same time. When documentation supports it, Q78.8 and the excluded code may both be reported.
- congenital myotonic chondrodystrophy (G71.13)
How long has Q78.8 existed?
Q78.8 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.
Which codes are confused with Q78.8?
ICD-10-CM declares these codes mutually exclusive with Q78.8 — exactly one of each pair can be correct for a given encounter.