CPT code 00840: Intraperitoneal anesthesia, lower abdomen, other procedures2026 Medicare rate & RVUs in Illinois

CMS doesn’t publish an office rate for 00840 in Illinois.

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

What 00840 covers

00840 applies to anesthesia for an intraperitoneal operation in the lower abdomen when a more specific anesthesia category does not identify the procedure. It covers qualifying open or laparoscopic work within the peritoneal cavity, rather than surgery limited to the abdominal wall or performed outside the cavity. An anesthesiologist or CRNA reports the anesthesia service in the operative setting; the surgeon reports the operation under its own procedure code.

Select this category for otherwise unclassified lower abdominal intraperitoneal procedures; use the relevant procedure-specific anesthesia category for tubal ligation or named extensive pelvic operations. The operative record should identify the procedure, site, and approach, and the anesthesia record should support the service and document its start and end times. Medicare payment is (6 base units + time units) × the locality’s anesthesia conversion factor. Time is reported in minutes and converted to 15-minute units to one decimal place, starting when the practitioner begins preparing the patient for anesthesia and ending when personal attendance ends 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 00840 pays more and less in Illinois

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

How the 00840 rate is calculated

Each of 00840’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 00840

00840 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.

00840 compared with similar codes

How to choose

00800Abdominal wall anesthesiaOther lower anterior wall procedures

00800 covers procedures on the lower anterior abdominal wall. Choose 00840 when the operation is within the peritoneal cavity.

00830Hernia anesthesiaLower abdomen, unspecified

00830 is for lower abdominal hernia repair. Use 00840 for other qualifying intraperitoneal lower abdominal operations.

00860Lower abdominal anesthesiaExtraperitoneal, unspecified procedure

00860 is for extraperitoneal lower abdominal procedures. Use 00840 when the operative work is intraperitoneal.

00851Tubal ligation anesthesiaIntraperitoneal procedure

00851 is the specific anesthesia category for tubal ligation; 00840 is for other qualifying, otherwise unclassified intraperitoneal lower abdominal procedures.

Codes related to 00840

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