Q78.6 — Multiple congenital exostoses
Is Q78.6 billable?
Yes — Q78.6 is billable for FY2027. Q78.6 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. Q78.6 may be submitted for encounters from October 1, 2026 through September 30, 2027.
Q78.6 at a glance
| Code | Q78.6 |
|---|---|
| Description | Multiple congenital exostoses |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does Q78.6 group to?
Q78.6 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 Q78.6 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to Q78.6. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Aclasis, diaphyseal
- Diaphysial aclasis
- Exostosis › congenital
- Exostosis › multiple, congenital
Inclusion terms
Alternative wording in documentation that is classified to Q78.6.
- Diaphyseal aclasis
Excludes2 — not included here — inherited from Chapter 17
The conditions below are not part of Q78.6, but a patient may have both at the same time. When documentation supports it, Q78.6 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 Q78.6, but a patient may have both at the same time. When documentation supports it, Q78.6 and the excluded code may both be reported.
- congenital myotonic chondrodystrophy (G71.13)
How long has Q78.6 existed?
Q78.6 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.