CPT code 00844: Abdominoperineal anesthesia, combined abdominal and perineal approach2026 Medicare rate & RVUs

Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.

What 00844 covers

This service covers anesthesia for an abdominoperineal resection. The operation removes the rectum and anus through combined abdominal and perineal approaches and ends with a permanent colostomy. An anesthesia practitioner, such as an anesthesiologist or CRNA, provides and reports the service for this lower-abdominal intraperitoneal operation.

Choose 00844 for this resection rather than 00840 for other lower-abdominal intraperitoneal procedures, 00846 for radical hysterectomy, or 00848 for pelvic exenteration. The operative report should identify the resection and both approaches; the anesthesia record should support the service and its start and stop times. This code has 7 base units. Medicare payment is the sum of base units and time units multiplied by the locality’s anesthesia conversion factor. Time is reported in minutes, converted to 15-minute units to one decimal place, from preparation for anesthesia until the practitioner is no longer in personal attendance and the patient can safely be placed under postoperative care; the conversion factor varies by locality.

This summary was written with AI assistance from CMS physician fee schedule data and checked against the CMS billing rules shown here. Rates on this page come directly from CMS files.

Where 00844 pays more and less

The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.

109 of 109 payment localities

00844 rates by state

Office rate range in each state. Select a state to see its payment localities.

How the 00844 rate is calculated

Each of 00844’s three RVUs is multiplied by a geographic index (GPCI) for the payment locality, added up, and multiplied by the conversion factor. Drag the indexes or enter a ZIP to see what moves the rate.

Payment rules and modifiers for 00844

00844 has no global surgery period, no multiple-procedure, bilateral or assistant-at-surgery adjustment, and no professional/technical split. What changes the payment is where the service happens: the place of service on the claim decides whether Medicare pays the office or the facility rate.

00844 compared with similar codes

How to choose

00840Intraperitoneal anesthesiaLower abdomen, other procedures

00840 covers other lower-abdominal intraperitoneal procedures. Choose 00844 when the operation is an abdominoperineal resection through abdominal and perineal approaches.

00846Radical hysterectomy anesthesiaIntraperitoneal lower abdominal procedure

00846 applies to radical hysterectomy anesthesia. It is not the category for resection of the rectum and anus with a permanent colostomy.

00848Pelvic exenterationIntraperitoneal pelvic procedure

00848 applies to pelvic exenteration. Use 00844 for abdominoperineal resection when the operative report supports that procedure.

Codes related to 00844

Related codes aren’t interchangeable: bill the code that matches the service performed.

Where these rates come from

FeeBase calculates base physician payments from CMS work, practice-expense and malpractice RVUs, adjusted by each locality’s geographic indexes and the conversion factor. Services without a published rate are labeled, never given a made-up amount. Amounts are Medicare allowed amounts before claim adjustments: not a patient’s bill or a commercial rate.

CMS RVU26D · effective Oct 1, 2026 through the day before Jan 1, 2027

Open CMS sourceHow we calculate rates