Q85 – Phakomatoses, not elsewhere classified
ICD-10-CM 2027 diagnosis code · Other congenital malformations
ICD-10-CM code
Q85
- Code
Q85(claims format:Q85)- Description
- Phakomatoses, not elsewhere classified
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 17. Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)
- Block
- Q80-Q89 Other congenital malformations
Billable codes under Q85
Q85 is a header code and cannot be used on claims. Choose the most specific code:
- Q85.0 – Neurofibromatosis (nonmalignant)Header (more codes below)
- Q85.1 – Tuberous sclerosisBillable
- Q85.8 – Other phakomatoses, not elsewhere classifiedHeader (more codes below)
- Q85.9 – Phakomatosis, unspecifiedBillable
Notes for Q85
Frequently asked questions
What is ICD-10 code Q85?
Q85 is the ICD-10-CM code for phakomatoses, not elsewhere classified, in the block Q80-Q89 (Other congenital malformations).
Is Q85 a billable code?
No. Q85 is a header code with more specific child codes; report one of the billable codes listed above.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.