$303.06–$336.38
Choose 58100 for endometrial sampling without cervical dilation. Choose 58120 when dilation and curettage is performed.
On this page
CMS RVU26D · Effective 2026-10-01
58100 Endometrial biopsy Medicare reimbursement rates in Washington
Reports office or facility sampling of the uterine lining, with or without endocervical sampling, when the clinician does not dilate the cervix. Compare 58100 office and facility rates across CMS payment localities in Washington.
Amounts below use the non-QP conversion factor for participating physicians. These are base physician payments before claim-level adjustments, not patient costs or total hospital charges.
What does Medicare pay for 58100 in Washington?
Washington has 2 payment localities in this comparison. Use the service location to choose the applicable amount. These are the supported base rates for the 2 payment areas shown below, using the same CMS release.
Office / nonfacility
$99.78–$110.64
2 of 2 localities have a supported rate.
Facility setting
$54.41–$57.77
2 of 2 localities have a supported rate.
These are locality ranges, not averages or address-specific quotes. A facility-setting amount covers the physician service; it does not include a hospital’s separate bill. Choose a locality below to inspect its calculation, compare other payment areas, or price a percentage of Medicare.
Gynecology procedure
About 58100: Endometrial sampling without cervical dilation
Reports office or facility sampling of the uterine lining, with or without endocervical sampling, when the clinician does not dilate the cervix.
A clinician obtains tissue from the uterine lining for evaluation, commonly for abnormal uterine bleeding, postmenopausal bleeding, or concern for endometrial hyperplasia or cancer. The sample may be collected by aspiration or another method, and endocervical sampling may be included. Gynecologists commonly perform this procedure in an office or outpatient facility, often using a narrow sampling device passed through the cervix without dilation.
Report the service when endometrial sampling is performed without cervical dilation; documentation should identify the indication, sampling performed, and method when relevant. The code has a 0-day global period, so same-day preoperative and postoperative care is included. When multiple procedures occur in the same session, the highest-valued procedure is paid in full and other procedures are subject to the standard 50% multiple procedure reduction. Modifier 50 is inappropriate. Medicare does not pay an assistant at surgery for this service; co-surgeons and team surgery are not permitted.
CMS billing rules for 58100
- Global period
- Minor procedure with a 0-day global period: same-day preoperative and postoperative care is included.
- Multiple procedures
- Standard multiple procedure reduction: the highest-valued procedure is paid in full and others at 50% when performed in the same session.
- Bilateral procedures
- Bilateral adjustment does not apply; the descriptor or anatomy makes modifier 50 inappropriate.
- Assistant at surgery
- Statutory restriction: assistant at surgery is not paid.
- Co-surgeons
- Co-surgeons not permitted.
- Team surgery
- Team surgery not permitted.
Where the value comes from
- Work RVU1.18 · 40%
- Practice expense (office) RVU1.55 · 53%
- Malpractice RVU0.21 · 7%
53.9K
Medicare services in 2024 · #755 by national volume
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.
58100 compared with similar codes
Office rates for Washington, from the same CMS release.
$51.44–$56.35
58110 is for endometrial sampling performed with colposcopy and is an add-on to the applicable primary procedure; 58100 describes sampling without that colposcopy circumstance.
$155.71–$175.86
58100 samples the uterine lining, while 57500 describes biopsy of cervical tissue. Select based on the tissue site sampled.
Compare 58100 by payment locality
Find the payment area for your service address, then open its rate page for calculation inputs, release history and the percentage-of-Medicare tool. A city may cross payment-area boundaries; the ZIP lookup above helps resolve the location.
2 of 2 payment localities
Rest Of Washington →
Office / nonfacility
$99.78
Facility
$54.41
Seattle (King Cnty) →
Office / nonfacility
$110.64
Facility
$57.77
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58100 billing questions
When should this code be chosen over 58120?
Use 58100 for endometrial sampling without cervical dilation. Code 58120 describes dilation and curettage, rather than sampling without dilation.
Can endocervical sampling be included?
Yes. The service may include endocervical sampling along with the uterine lining sample; document which tissue was obtained.
Should modifier 50 be appended for sampling both sides?
No. The CMS bilateral adjustment does not apply, and modifier 50 is inappropriate for this service.
What documentation supports reporting 58100?
Document the clinical reason for sampling, that endometrial tissue was obtained, and that cervical dilation was not performed. Record any endocervical sampling as well.
How does the 0-day global period affect same-day care?
Same-day preoperative and postoperative care is included in the procedure's payment.
Where these rates come from
FeeBase calculates base physician payments from CMS work, practice-expense, and malpractice RVUs, adjusted by each locality’s geographic indices and the applicable conversion factor. Unavailable or separately priced services are labeled rather than assigned a made-up amount.
Source: RVU26D. Effective 2026-10-01 through the day before 2027-01-01.
6,51357700,,Revision of cervix,A,,4.24,4.55,NA,4.55,,0.75,9.54,9.54,0,090,0.12,0.74,0.14,2,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
6,51457720,,Revision of cervix,A,,4.49,3.68,NA,3.68,,0.79,8.96,8.96,0,090,0.12,0.74,0.14,2,0,2,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
6,51557800,,Dilation of cervical canal,A,,0.75,1.33,,0.41,,0.14,2.22,1.30,0,000,0.00,0.00,0.00,2,0,1,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
6,51658100,,Biopsy of uterus lining,A,,1.18,1.55,,0.26,,0.21,2.94,1.65,0,000,0.00,0.00,0.00,2,0,1,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
6,51758110,,Bx done w/colposcopy add-on,A,,0.75,0.64,,0.17,,0.14,1.53,1.06,0,ZZZ,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
6,51858120,,Dilation and curettage,A,,3.50,4.78,,2.13,,0.65,8.93,6.28,0,010,0.10,0.80,0.10,2,0,1,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
6,51958140,,Myomectomy abdom method,A,,15.40,6.24,NA,6.24,,2.70,24.34,24.34,0,090,0.12,0.74,0.14,2,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00