A0999 Unlisted ambulance service
Also known as: unlisted ambulance, miscellaneous ambulance, unlisted service
Unlisted ambulance service or mileage, a catch-all code for ambulance-related services or supply items not specifically listed in the Healthcare Common Procedure Coding System.
In Plain Language
non-standard ambulance service
Clinical Context
Used for new or unusual ambulance services, supplies, or conditions not described by other HCPCS codes, often requiring additional documentation.
RVU Information
CPT A0999 does not have a physician work RVU assigned by CMS. This is typical for supply, drug, and equipment codes — reimbursement is based on Average Sales Price (ASP), fee schedules, or payer contracts rather than the RVU system.
Billing & Documentation
HCPCS A-codes cover medical supplies, equipment, and transport services. Documentation must establish medical necessity and include a physician order. For durable medical equipment (DME), a Certificate of Medical Necessity (CMN) or detailed written order may be required.
Specialties
Frequently Asked Questions
What is CPT code A0999?
CPT A0999 (Unlisted ambulance service) is a A Codes code. Unlisted ambulance service or mileage, a catch-all code for ambulance-related services or supply items not specifically listed in the Healthcare Common Procedure Coding System.
Does Medicare cover A0999?
Medicare coverage for A0999 depends on medical necessity and applicable Local Coverage Determinations (LCDs). Used for new or unusual ambulance services, supplies, or conditions not described by other HCPCS codes, often requiring additional documentation. A physician order is typically required.
When is CPT A0999 used?
Used for new or unusual ambulance services, supplies, or conditions not described by other HCPCS codes, often requiring additional documentation.
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CPT® is a registered trademark of the American Medical Association. Data sourced from CMS Physician Fee Schedule RVU26A. Descriptions, synonyms, and clinical context are original content by RVU Edge.