CPT code 44145: Partial colectomy, low pelvic anastomosis2026 Medicare rate & RVUs in California

CMS doesn’t publish an office rate for 44145 in California.

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

What 44145 covers

This open abdominal operation removes a segment of colon and reconnects the remaining colon to the rectum with a low pelvic anastomosis. A colorectal or general surgeon may perform it for rectosigmoid cancer, complicated diverticular disease, or another condition requiring resection when bowel continuity can be restored. The operative report should establish the resection and the low pelvic connection; the diagnosis alone does not distinguish this service from other partial colectomy procedures.

Select this code when the documented operation includes the low pelvic coloproctostomy, rather than a different reconstruction or ostomy. The 90-day global period includes the day-before preoperative visit and 90 days of related postoperative care. In a same-session multiple-procedure claim, the highest-valued procedure is paid in full and other procedures are subject to the standard 50% reduction. Assistant-at-surgery payment may be available; co-surgeon payment requires supporting documentation, and team-surgery payment is not permitted.

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 44145 pays more and less in California

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

29 of 29 payment localities

How the 44145 rate is calculated

Each of 44145’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 44145

44145 has a 90-day global period: related visits in that window are included in the surgery payment.

What modifiers do to the payment

When to use modifier 51

44145 compared with similar codes

How to choose

44140Partial colectomyWith anastomosis

Both describe partial colectomy with anastomosis, but 44145 is distinguished by a low pelvic connection between colon and rectum.

44146Partial colectomyLow pelvic anastomosis with colostomy

44146 includes the low pelvic anastomosis plus a colostomy; 44145 describes the low pelvic anastomosis without that additional colostomy.

44207ColectomyLow pelvic anastomosis

44207 describes the laparoscopic approach for a comparable low pelvic anastomosis. 44145 represents the open operation.

Codes related to 44145

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