• HCPCS Level II codes are alphanumeric and primarily include non-physician services such as ambulance
  Ambulance
  An ambulance is a vehicle for transportation of sick or injured people to, from or between places of treatment for an illness or injury, and in some instances will also provide out of hospital medical care to the patient...
  
   services and prosthetic devices, and represent items and supplies and non-physician services not covered by CPT-4 codes (Level I). Level II alphanumeric procedure and modifier codes are a single alphabetical letter followed by 4 numeric digits; the first alphabetic letter is in the A to V range. Level II codes are maintained by the US Centers for Medicare and Medicaid Services (CMS). There is some overlap between HCPCS codes and National Drug Code
  National Drug Code
  The National Drug Code is a unique product identifier used in the United States for drugs intended for human use. The Drug Listing Act of 1972 requires registered drug establishments to provide the Food and Drug Administration with a current list of all drugs manufactured, prepared, propagated,...
  
  (NDC) codes, with a subset of NDC codes also in HCPCS, and vice-versa. The CMS maintains a crosswalk from NDC to HCPCS in the form of an Excel file. The crosswalk is updated quarterly.

Types of Level II codes

• A-codes (example: ): Transportation, Medical & Surgical Supplies, Miscellaneous & Experimental
• B-codes (example: ): Enteral and Parenteral Therapy
• C-codes (example: ): Temporary Hospital Outpatient Prospective Payment System
• D-codes: Dental Procedures
• E-codes (example: ): Durable Medical Equipment
• G-codes (example: ): Temporary Procedures & Professional Services
• H-codes (example: ): Rehabilitative Services
• J-codes (example: ): Drugs Administered Other Than Oral Method, Chemotherapy Drugs
• K-codes (example: ): Temporary Codes for Durable Medical Equipment Regional Carriers
• L-codes (example: ): Orthotic/Prosthetic Procedures
• M-codes (example: ): Medical Services
• P-codes (example: ): Pathology and Laboratory
• Q-codes (example: ): Temporary Codes
• R-codes (example: ): Diagnostic Radiology Services
• S-codes (example: ): Private Payer Codes
• T-codes (example: ): State Medicaid Agency Codes
• V-codes (example: ): Vision/Hearing Services