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Anesthesia Codes 

Anesthesia codes are part of the six main CPT Category I codes. They are reported with their five-digit code plus modifier code(s). 



Time begins when the anesthesiologist  begins to prepare the patient for the induction and ends when the anesthesiologist is no longer needed. 


Some anesthesia services are listed into other sections:

  • E/M Services (99201-99499)

    • ​Services provided in the office, home, or hospital; consultation, 

  • Medicine (99000-99091)

    • "Special Services and Reporting"  

Supplied Materials

Supplies and materials exceeding those usually included may be listed separately.  

Separate or Multiple Procedures

Report the anesthesia code representing the most complex procedure when multiple procedures are performed during a single administration.


Combine the total time for all procedures. 

Special Report

Some services that are new, rarely provided, variable, or unusual require a special report. These reports must include pertinent  information, including a description of the following:

  • nature, extent, & need for procedure

  • time, effort, & equipment necessary





  • Head

  • Neck

  • Thorax

  • Intrathoracic

  • Spine and Spinal Cord

  • Upper Abdomen

  • Perineum

  • Pelvis

  • Upper Leg

  • Knee and Popliteal (Ankle & Foot)

  • Lower Leg

  • Shoulder & Axilla

  • Upper Arm & Elbow

  • Forearm, Wrist, & Hand

  • Radiological Procedures

  • Burn Excisions or Debridement

  • Obstetric

  • Other Procedures


  • Anesthesia Modifiers 


  • AMA

  • Annually:

    • Late Summer or Early Fall

    • Electronic Data Files / Books

  • Effective January 1


Qualifying Circumstances

Factors such as patient condition, notable operative conditions, and/or unusual risk factors can create difficult circumstances. When these occur when anesthesia services are provided, qualifying circumstances would be reported as additional procedure numbers.

These are NEVER reported alone. 


Anesthesia codes have their own set of modifiers, which indicate the physical status of the patient. ALL anesthesia codes must include one of these modifiers. (Additional modifiers may also be used when appropriate.) 

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