HCPCS A9540
Tc99m maa
Last reviewed August 2026 · DataLily AI data team
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HCPCS A9540 at a glance
- Code
- A9540
- Code type
- CPT/HCPCS
- Short descriptor
- Tc99m maa
- Category
- ASC Ancillary
- ASC eligibility
- ASC-eligible (ancillary)
- Typical setting
- Ambulatory surgery center (POS 24) or hospital outpatient department (POS 22).
What is HCPCS code A9540?
HCPCS A9540 is a CPT/HCPCS procedure code for Tc99m maa. Its official short descriptor is "Tc99m maa". In the ASC context it is grouped under ASC Ancillary.
Is HCPCS A9540 eligible in an ambulatory surgery center (ASC)?
HCPCS A9540 is an ancillary service that can be provided in the ASC setting when it supports a surgical procedure.
Where is HCPCS A9540 typically performed?
Ambulatory surgery center (POS 24) or hospital outpatient department (POS 22).
Reference information about ASC eligibility and typical procedure setting. Codes, descriptors, and ASC-eligibility status change over time. This is a coding reference, not billing, coding, or legal advice. Always verify against current guidance and individual payer policy before scheduling or billing. CPT is a registered trademark of the American Medical Association. Read the DataLily AI data methodology.