CPT 91020
Gastric motility studies
CPT 91020 at a glance
- Code
- 91020
- Code type
- CPT/HCPCS
- Short descriptor
- Gastric motility studies
- Category
- ASC Ancillary
- ASC payment status
- Payable in an ASC (ancillary)
- CMS addendum
- BB (Ancillary)
- Typical setting
- Ambulatory surgery center (POS 24) or hospital outpatient department (POS 22).
What is CPT code 91020?
CPT 91020 is a CPT/HCPCS procedure code. Its official CMS short descriptor is "Gastric motility studies". In the ASC context it is grouped under ASC Ancillary.
Is CPT 91020 payable in an ambulatory surgery center (ASC)?
CPT 91020 is a covered ancillary service (CMS Addendum BB). Medicare reimburses it in the ASC setting when it is integral to a covered ASC surgical procedure.
Where is CPT 91020 typically performed?
Ambulatory surgery center (POS 24) or hospital outpatient department (POS 22).
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.