CPT 21423
Optx palatal/max fx comp
CPT 21423 at a glance
- Code
- 21423
- Code type
- CPT/HCPCS
- Short descriptor
- Optx palatal/max fx comp
- Category
- ASC Surgical
- ASC payment status
- Payable in an ASC (surgical)
- CMS addendum
- AA (Surgical)
- Typical setting
- Ambulatory surgery center (POS 24) or hospital outpatient department (POS 22).
What is CPT code 21423?
CPT 21423 is a CPT/HCPCS procedure code. Its official CMS short descriptor is "Optx palatal/max fx comp". In the ASC context it is grouped under ASC Surgical.
Is CPT 21423 payable in an ambulatory surgery center (ASC)?
CPT 21423 appears on Medicare's ASC Covered Procedures List (CMS Addendum AA), so Medicare reimburses it when the surgery is performed in a certified ambulatory surgery center.
Where is CPT 21423 typically performed?
Ambulatory surgery center (POS 24) or hospital outpatient department (POS 22).
Which specialties use CPT 21423?
CPT 21423 is most associated with General Surgery, Oral & Maxillofacial Surgery, Orthopaedic Surgery.
Reference information compiled from the CMS April 2026 ASC payment addenda (AA, BB, EE). Codes, descriptors, and ASC payment status change with each CMS update. This is a coding reference, not billing, coding, or legal advice. Always verify against the current CMS addenda and individual payer policy before billing. CPT is a registered trademark of the American Medical Association.