Anesthesiologist Assistant Anesthesia Codes in the ASC Setting
An anesthesiologist assistant (AA) delivers anesthesia care under the direction of a supervising anesthesiologist. In an ambulatory surgery center, AAs develop and implement the anesthetic plan, manage the airway and monitoring during the case, and help move patients safely through recovery.
Anesthesia for ASC procedures is reported with codes in the Anesthesia family, 00100 through 01999, organized by anatomic region rather than the individual surgical CPT. For example, 01402 covers anesthesia for knee arthroplasty and 00176 covers anesthesia for pharyngeal surgery. Facility payment and coverage depend on the underlying surgical procedure and its status on the CMS ASC Covered Procedures List. DataLily's procedure library tracks CPT-specific prior-authorization and documentation requirements so the anesthesia and surgical sides of a case stay aligned.
Anesthesiologist Assistant codes(58)
- 01402Anesth knee arthroplasty
- 00176Anesth pharyngeal surgery
- 00192Anesth facial bone surgery
- 00211Anesth cran surg hemotoma
- 00214Anesth skull drainage
- 00215Anesth skull repair/fract
- 00474Anesth surgery of rib
- 00524Anesth chest drainage
- 00540Anesth chest surgery
- 00542Anesthesia removal pleura
- 00546Anesth lung chest wall surg
- 00560Anesth heart surg w/o pump
- 00561Anesth heart surg <1 yr
- 00562Anesth hrt surg w/pmp age 1+
- 00567Anesth cabg w/pump
- 00580Anesth heart/lung transplnt
- 00604Anesth sitting procedure
- 00632Anesth removal of nerves
- 00670Anesth spine cord surgery
- 00792Anes iper upr abd prtl hptc
- 00794Anes iper upr abd pncrtect
- 00796Anes iper upr abd lvr trnspl
- 00802Anesth fat layer removal
- 00844Anesth pelvis surgery
- 00846Anesth hysterectomy
- 00848Anesth pelvic organ surg
- 00864Anesth removal of bladder
- 00865Anesth removal of prostate
- 00866Anesth removal of adrenal
- 00868Anesth kidney transplant
- 00882Anesth major vein ligation
- 00904Anesth perineal surgery
- 00908Anesth removal of prostate
- 00932Anesth amputation of penis
- 00934Anesth penis nodes removal
- 00936Anesth penis nodes removal
- 00944Anesth vaginal hysterectomy
- 01140Anesth amputation at pelvis
- 01150Anesth pelvic tumor surgery
- 01212Anesth hip disarticulation
- 01214Anesth hip arthroplasty
- 01232Anesth amputation of femur
- 01234Anesth radical femur surg
- 01272Anesth femoral artery surg
- 01274Anesth femoral embolectomy
- 01404Anesth amputation at knee
- 01442Anesth knee artery surg
- 01444Anesth knee artery repair
- 01486Anesth ankle replacement
- 01502Anesth lwr leg embolectomy
- 01634Anesth shoulder joint amput
- 01636Anesth forequarter amput
- 01638Anesth shoulder replacement
- 01652Anesth shoulder vessel surg
- 01654Anesth shoulder vessel surg
- 01656Anesth arm-leg vessel surg
- 01756Anesth radical humerus surg
- 01990Support for organ donor
Do anesthesiologist assistants work in ambulatory surgery centers?
Yes. AAs are part of the anesthesia care team in many ASCs, working under the direction of a supervising anesthesiologist. They help with the anesthetic plan, airway management, intra-operative monitoring, and recovery, which supports the fast turnover an outpatient setting depends on.
What CPT codes do anesthesiologist assistants use?
Anesthesia care is reported with codes in the 00100-01999 family, organized by anatomic region and procedure rather than by the surgery's own CPT. Examples relevant to ASCs include 01402 for knee arthroplasty anesthesia, 00176 for pharyngeal surgery, and 00192 for facial bone surgery.
How does ASC place of service affect anesthesia billing?
Anesthesia provided in an ASC is reported with place of service 24. The anesthesia code reflects the service provided, while facility coverage and payment track the underlying surgical procedure. Procedures on CMS Addendum AA are on the ASC Covered Procedures List, meaning Medicare pays them in an ASC, so it is worth confirming the surgical code's status alongside the anesthesia claim.