Billing code 45113: Partial proctectomyMedicare rate & RVUs in Oregon
Reports surgical removal of part of the rectum when the operation includes bowel reconstruction and a colostomy, such as for selected rectal disease.
CMS doesn’t publish an office rate for 45113 in Oregon.
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
On this page 9 sections
What 45113 covers
A colorectal surgeon removes a portion of the rectum and creates a colostomy as part of the operative plan. The procedure is generally performed in a hospital operating room for conditions such as rectal cancer or other disease requiring resection. The operative report should make clear how much rectum was removed, the reconstruction performed, and the colostomy created.
Select this code when the documented operation matches partial rectal resection with the specified colostomy approach, rather than a more extensive complete proctectomy or a different reconstruction. Report the service for the surgeon’s operative work; documentation should support the indication, resection extent, and surgical details. Medicare assigns a 90-day global period, including the day-before preoperative visit and related postoperative care during the following 90 days. When multiple procedures are performed in the same session, the highest-valued procedure is paid in full and other procedures are subject to the standard 50% multiple-procedure reduction. Assistant-at-surgery payment may be made; co-surgeon payment requires supporting documentation, and team surgery 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 45113 pays more and less in Oregon
| Payment locality | Office | Facility |
|---|---|---|
| Portland | Unavailable | $1,723.72 |
| Rest Of Oregon | Unavailable | $1,647.37 |
How the 45113 rate is calculated
Each of 45113’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.
How the rate is built · 45113
RVUs × geographic indexes × conversion factor
Swap in your local Medicare rate.
Work 32.39Practice expense 13.71Malpractice 4.66
All indexes start at 1.000 (the national rate). Enter a ZIP or drag a slider.
Payment rules and modifiers for 45113
45113 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 45113
Partial proctectomy
| Rule | CMS value | What it means |
|---|---|---|
| Global period | 090 | Major surgery: the day before, the day of, and 90 days after are included. |
| Multiple procedures | 2 | Standard reduction: highest-valued procedure at 100%, others at 50%. |
| Bilateral (modifier 50) | 0 | The 150% bilateral adjustment doesn’t apply. |
| Assistant at surgery (80/81/82/AS) | 2 | Paid. |
| Co-surgeons (62) | 1 | Permitted with supporting documentation. |
| Team surgery (66) | 0 | Not permitted. |
| Professional/technical | 0 | Physician service: no professional/technical split. |
| Split (54/55/56) | 0.09/0.81/0.10 | Share of the payment for pre-op, the procedure itself, and post-op care. |
Global surgery period · 45113
Partial proctectomy
90-day global period ends
Dec 30, 2026
Covers Sep 30, 2026 through Dec 30, 2026 (92 days, including the day before surgery).
Visit on Oct 31, 2026
Day 30 of the 90-day post-op period: related follow-up care is included in the surgical payment.
Pre-op dayGlobal period
What modifiers do to the payment
Modifier 51 · payment effect
With and without the modifier
45113 without 51 · national facility
$1,695.43
Partial proctectomy
45113-51 · Second procedure: 50%
$847.72
When this isn’t the highest-valued procedure in the session, Medicare pays 50% of its fee schedule amount (the highest is paid at 100%).
45113 compared with similar codes
Compare codes
45113 vs 45111 vs 45114 vs 45112: national Medicare rates
Swap in your local Medicare rate.
How to choose
- 45111Partial proctectomy
- Choose 45113 when the documented partial proctectomy includes a colostomy. Choose 45111 for partial proctectomy with anastomosis without that colostomy distinction.
- 45114Rectal resection
- 45114 identifies a pull-through reconstruction with rectal mucosectomy. This code is for the partial proctectomy with colostomy.
- 45112Rectal removal
- 45112 describes complete rather than partial rectal removal. The amount of rectum removed in the operative report distinguishes the services.
45113 billing questions
How does this differ from 45111?
45113 is the partial proctectomy code when the operation includes a colostomy. Use 45111 when the documented partial resection is performed with anastomosis without the colostomy distinction.
Does the global period include routine postoperative care?
Yes. The 90-day global period includes the day-before preoperative visit and related postoperative care for 90 days.
Can an assistant surgeon be reported?
CMS allows payment for an assistant at surgery for this procedure. Co-surgeon payment requires supporting documentation.
Can modifier 50 be used for a bilateral procedure?
No. The anatomy and service are not bilateral for Medicare payment purposes, so a bilateral adjustment is inappropriate.
What happens when another procedure is performed in the same session?
The highest-valued procedure is paid in full, and other procedures are subject to the standard multiple-procedure reduction.
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
Show the CMS file lines behind this rate
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