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CPT code 58100: Endometrial biopsy, without cervical dilation2026 Medicare rate & RVUs in Puerto Rico

Reports office or facility sampling of the uterine lining, with or without endocervical sampling, when the clinician does not dilate the cervix.

CMS RVU26DEffective Oct 1, 2026One payment locality53.9K Medicare services in 2024

In Puerto Rico, Medicare pays $98.66 for 58100 in the office and $55.10 when it’s performed in a hospital or facility.

$98.66Office (non-facility)
$55.10Hospital or facility
+0.5%vs the national office rate ($98.20)

Check a contract rate as a % of Medicare · 58100 nationwide

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

We’ll open 58100 for the payment locality that covers the ZIP.

On this page 11 sections
  1. Rate in Puerto Rico
  2. What 58100 covers
  3. Compared with other areas
  4. Rate map
  5. How it’s calculated
  6. Payment rules
  7. Related codes
  8. Rate history
  9. Where it applies
  10. Billing questions
  11. Sources

What 58100 covers

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.

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.

How Puerto Rico compares for 58100

Across 109 of 109 payment localities, the office rate for 58100 runs from $87.50 in Arkansas to $122.16 in San Benito County, CA. Puerto Rico pays $98.66. The RVUs are the same everywhere; the geographic indexes change the dollars.

58100 in Puerto Rico vs other payment areas
  1. Puerto Rico · this page$98.66
  2. Los Angeles, CA · California$106.93+$8.27
  3. Washington, DC area · District of Columbia$110.33+$11.67
  4. Miami, FL · Florida$111.05+$12.39
  5. Chicago, IL · Illinois$107.82+$9.16
  6. Manhattan, NY · New York$113.22+$14.56
  7. Alaska · Alaska$118.12+$19.46

Other areas in Puerto Rico first, then benchmark localities. Bars start at $0.

Every other payment area

58100 in every other Medicare payment locality
Payment localityOfficeFacility
AlabamaAlabama$88.68$50.98
ArkansasArkansas$87.50$50.49
ArizonaArizona$95.58$53.83
Bakersfield, CACalifornia$101.18$53.95
Chico, CACalifornia$100.58$53.36
El Centro, CACalifornia$100.62$53.40
Fresno, CACalifornia$100.58$53.36
Hanford, CACalifornia$100.58$53.36

58100 rates by state

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

MEWIVTNHMTNDMNMINYMARIWAIDWYSDIAILINOHPANJCTORNVUTCONEMOKYWVVAMDDECAAZNMKSOKARTNNCSCDCTXLAMSALGAFLAKHI

Explore a state

Local rates. Clear comparisons.

Hover or focus a tile to see its rate range. Select it to open the state’s fee schedule.

$87.50

$118.12

Color shows the midpoint of each state’s locality range.

View every state and territory as a table
58100 office rate range by state
State / territoryOffice rate rangeLocalities
AK$118.121
AL$88.681
AR$87.501
AZ$95.581
CA$100.58–$122.1629
CO$100.451
CT$104.451
DC$110.331
DE$97.071
FL$99.45–$111.053
GA$93.95–$100.562
GU$102.341
HI$102.341
IA$89.571
ID$90.361
IL$97.64–$107.824
IN$90.811
KS$89.751
KY$91.861
LA$91.95–$96.102
MA$100.15–$109.092
MD$98.64–$110.333
ME$91.41–$95.142
MI$94.60–$101.202
MN$94.761
MO$90.87–$95.733
MS$89.171
MT$98.181
NC$92.201
ND$94.031
NE$89.851
NH$99.441
NJ$105.22–$109.442
NM$95.311
NV$97.081
NY$93.53–$116.525
OH$93.751
OK$91.091
OR$95.91–$102.782
PA$93.57–$102.382
PR$98.661
RI$99.901
SC$93.211
SD$93.541
TN$90.241
TX$93.04–$100.798
UT$94.381
VA$95.26–$110.332
VI$98.661
VT$94.221
WA$99.78–$110.642
WI$91.171
WV$94.441
WY$96.371

See 58100 in every payment locality

How the 58100 rate is calculated

Each of 58100’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 · 58100

RVUs × geographic indexes × conversion factor

Office or facility?

Work1.18

1.18 RVUs× 1.000 GPCI

Practice expense1.55

1.55 RVUs× 1.000 GPCI

Malpractice0.21

0.21 RVUs× 1.000 GPCI

Adjusted RVUs

2.9400

Conversion factor

$33.4009

Medicare rate

$98.20

Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.

The exact Puerto Rico inputs and CMS source lines

PPRRVU2026_Oct_nonQPP.csv

6,516

Code
58100
Physician work
1.18
Practice expense
1.55
Malpractice
0.21

GPCI2026.csv

91

Locality
Puerto Rico
Physician work
1.000
Practice expense
1.011
Malpractice
0.985
Office calculation for 58100 in Puerto Rico
ComponentRVULocality factorAdjusted
Physician work1.18× 1.0001.1800
Practice expense1.55× 1.0111.5670
Malpractice0.21× 0.9850.2068
Total RVUs2.9539
Conversion factor× 33.4009

Office rate, Puerto Rico$98.66

Office: (1.18 × 1 + 1.55 × 1.011 + 0.21 × 0.985) × $33.4009 = $98.66

Facility: (1.18 × 1 + 0.26 × 1.011 + 0.21 × 0.985) × $33.4009 = $55.10

Open 58100 in the RVU calculator

Payment rules and modifiers for 58100

The CMS indicators that decide how 58100 is paid alongside other services.

CMS payment indicators · 58100

Endometrial biopsy, without cervical dilation

RuleCMS valueWhat it means
Global period000Same-day global: pre- and post-op care on the day of the procedure is included.
Multiple procedures2Standard reduction: highest-valued procedure at 100%, others at 50%.
Bilateral (modifier 50)0The 150% bilateral adjustment doesn’t apply.
Assistant at surgery (80/81/82/AS)1Not paid (statutory restriction).
Co-surgeons (62)0Not permitted.
Team surgery (66)0Not permitted.
Professional/technical0Physician service: no professional/technical split.

What modifiers do to the payment

Modifier 51 · payment effect

With and without the modifier

58100 without 51 · national office

$98.20

Endometrial biopsy, without cervical dilation

58100-51 · Second procedure: 50%

$49.10

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%).

When to use modifier 51

Codes related to 58100

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

Codes related to 58100
CodeHow it relatesOffice range, Puerto Rico
Used instead
58110Endometrial biopsy, performed with colposcopyFor endometrial sampling performed with colposcopy; it is an add-on to the applicable primary procedure.$51.27
58120Dilation and curettage, diagnostic or therapeutic, nonobstetricDescribes dilation and curettage rather than sampling without cervical dilation.$299.70
Often billed with
57500Cervical biopsy, tissue sampling or lesion excisionMay be reported for a separately performed biopsy of a cervical lesion.$152.36

How 58100 has changed in Puerto Rico

58100 · Office / nonfacility

$98.66

Effective 2026-10-01

The base rate is $1.05 higher than on 2025-10-01, moving from $97.61 to $98.66 (1.1%).

It is unchanged from the immediately preceding available release, effective 2026-07-01.

Base rate by release · bars start at $0 · select a bar to compare

One bar per available release, ordered by effective date. Missing rates remain gaps. These comparisons hold the code, setting and locality identifiers constant; they do not isolate which policy or input caused a change.

What changed, release by release

  1. January 1, 2026

    RVU26A

    $97.61changed to$98.66

    • Conversion factor 32.3465 changed to 33.4009
    • Work RVU 1.21 changed to 1.18
    • Practice expense RVU 1.60 changed to 1.55
    • Malpractice RVU 0.20 changed to 0.21
    • Practice expense GPCI 1.007 changed to 1.011
    • Malpractice GPCI 0.982 changed to 0.985

    Held through RVU26B, RVU26C, RVU26D.

  2. January 1, 2025

    RVU25A

    $102.12changed to$97.61

    • Conversion factor 33.2875 changed to 32.3465
    • Practice expense RVU 1.65 changed to 1.60

    Held through RVU25B, RVU25C, RVU25D.

  3. March 9, 2024

    RVU24AR

    $100.46changed to$102.12

    • Conversion factor 32.7442 changed to 33.2875

    Held through RVU24B, RVU24C, RVU24D.

  4. January 1, 2024

    RVU24A

    $104.04changed to$100.46

    • Conversion factor 33.8872 changed to 32.7442
    • Practice expense RVU 1.66 changed to 1.65
    • Malpractice RVU 0.19 changed to 0.20
    • Practice expense GPCI 1.008 changed to 1.007
    • Malpractice GPCI 0.984 changed to 0.982

  5. October 1, 2023

    RVU23D

    $103.69changed to$104.04

    • Practice expense GPCI 1.000 changed to 1.008
    • Malpractice GPCI 1.000 changed to 0.984

  6. January 1, 2023

    RVU23A

    $106.60changed to$103.69

    • Conversion factor 34.6062 changed to 33.8872
    • Malpractice RVU 0.20 changed to 0.19
    • Practice expense GPCI 1.008 changed to 1.000
    • Malpractice GPCI 0.986 changed to 1.000

    Held through RVU23B, RVU23C.

  7. January 1, 2022

    RVU22A

    $105.38changed to$106.60

    • Conversion factor 34.8931 changed to 34.6062
    • Practice expense RVU 1.60 changed to 1.66

    Held through RVU22B, RVU22C, RVU22D.

  8. January 1, 2021

    RVU21A

    $101.37changed to$105.38

    • Conversion factor 36.0896 changed to 34.8931
    • Practice expense RVU 1.40 changed to 1.60
    • Malpractice RVU 0.19 changed to 0.20
    • Malpractice GPCI 0.988 changed to 0.986

    Held through RVU21B, RVU21C, RVU21D.

  9. January 1, 2020

    RVU20A

    $95.41changed to$101.37

    • Conversion factor 36.0391 changed to 36.0896
    • Practice expense RVU 1.28 changed to 1.40
    • Malpractice RVU 0.15 changed to 0.19
    • Practice expense GPCI 1.007 changed to 1.008
    • Malpractice GPCI 0.990 changed to 0.988

    Held through RVU20B, RVU20C, RVU20D.

  10. January 1, 2019

    RVU19A

    $111.15changed to$95.41

    • Conversion factor 35.9996 changed to 36.0391
    • Work RVU 1.53 changed to 1.21
    • Practice expense RVU 1.36 changed to 1.28
    • Malpractice RVU 0.19 changed to 0.15

    Held through RVU19B, RVU19C, RVU19D.

  11. January 1, 2018

    RVU18AR1

    $101.68changed to$111.15

    • Conversion factor 35.8887 changed to 35.9996
    • Practice expense RVU 1.38 changed to 1.36
    • Practice expense GPCI 0.856 changed to 1.007
    • Malpractice GPCI 0.642 changed to 0.990

    Held through RVU18B, RVU18C, RVU18D.

  12. January 1, 2017

    RVU17A

    $91.36changed to$101.68

    • Conversion factor 35.8043 changed to 35.8887
    • Practice expense RVU 1.37 changed to 1.38
    • Practice expense GPCI 0.705 changed to 0.856
    • Malpractice GPCI 0.293 changed to 0.642

    Held through RVU17B, RVU17C, RVU17D.

  13. January 1, 2016

    RVU16A

    $91.69changed to$91.36

    • Conversion factor 35.9335 changed to 35.8043

    Held through RVU16B, RVU16C, RVU16D.

  14. July 1, 2015

    RVU15C

    $91.23changed to$91.69

    • Conversion factor 35.7547 changed to 35.9335

    Held through RVU15D.

  15. January 1, 2015

    RVU15A

    $90.95changed to$91.23

    • Conversion factor 35.8228 changed to 35.7547
    • Practice expense RVU 1.36 changed to 1.37
    • Malpractice RVU 0.25 changed to 0.19
    • Practice expense GPCI 0.692 changed to 0.705
    • Malpractice GPCI 0.271 changed to 0.293

    Held through RVU15B.

  16. January 1, 2014

    RVU14A

    $88.63changed to$90.95

    • Conversion factor 34.0230 changed to 35.8228
    • Practice expense RVU 1.49 changed to 1.36
    • Malpractice RVU 0.26 changed to 0.25
    • Practice expense GPCI 0.678 changed to 0.692
    • Malpractice GPCI 0.249 changed to 0.271

    Held through RVU14B, RVU14C, RVU14D.

  17. January 1, 2013

    RVU13AR

    Earliest loaded release: $88.63

    Held through RVU13B, RVU13C, RVU13D.

Rates in every CMS release
Effective fromOfficeFacilityCMS release
2026-10-01$98.66$55.10RVU26D
2026-07-01$98.66$55.10RVU26C
2026-04-01$98.66$55.10RVU26B
2026-01-01$98.66$55.10RVU26A
2025-10-01$97.61$61.13RVU25D
2025-07-01$97.61$61.13RVU25C
2025-04-01$97.61$61.13RVU25B
2025-01-01$97.61$61.13RVU25A
2024-10-01$102.12$62.91RVU24D
2024-07-01$102.12$62.91RVU24C
2024-04-01$102.12$62.91RVU24B
2024-03-09$102.12$62.91RVU24AR
2024-01-01$100.46$61.88RVU24A
2023-10-01$104.04$63.74RVU23D
2023-07-01$103.69$63.71RVU23C
2023-04-01$103.69$63.71RVU23B
2023-01-01$103.69$63.71RVU23A
2022-10-01$106.60$65.09RVU22D
2022-07-01$106.60$65.09RVU22C
2022-04-01$106.60$65.09RVU22B
2022-01-01$106.60$65.09RVU22A
2021-10-01$105.38$65.63RVU21D
2021-07-01$105.38$65.63RVU21C
2021-04-01$105.38$65.63RVU21B
2021-01-01$105.38$65.63RVU21A
2020-10-01$101.37$67.18RVU20D
2020-07-01$101.37$67.18RVU20C
2020-04-01$101.37$67.18RVU20B
2020-01-01$101.37$67.18RVU20A
2019-10-01$95.41$72.55RVU19D
2019-07-01$95.41$72.55RVU19C
2019-04-01$95.41$72.55RVU19B
2019-01-01$95.41$72.55RVU19A
2018-10-01$111.15$89.40RVU18D
2018-07-01$111.15$89.40RVU18C
2018-04-01$111.15$89.40RVU18B
2018-01-01$111.15$89.40RVU18AR1
2017-10-01$101.68$83.25RVU17D
2017-07-01$101.68$83.25RVU17C
2017-04-01$101.68$83.25RVU17B
2017-01-01$101.68$83.25RVU17A
2016-10-01$91.36$76.21RVU16D
2016-07-01$91.36$76.21RVU16C
2016-04-01$91.36$76.21RVU16B
2016-01-01$91.36$76.21RVU16A
2015-10-01$91.69$76.49RVU15D
2015-07-01$91.69$76.49RVU15C
2015-04-01$91.23$76.10RVU15B
2015-01-01$91.23$76.10RVU15A
2014-10-01$90.95$76.57RVU14D
2014-07-01$90.95$76.57RVU14C
2014-04-01$90.95$76.57RVU14B
2014-01-01$90.95$76.57RVU14A
2013-10-01$88.63$73.63RVU13D
2013-07-01$88.63$73.63RVU13C
2013-04-01$88.63$73.63RVU13B
2013-01-01$88.63$73.63RVU13AR

Price 58100 for an earlier date of service

Where the Puerto Rico rate applies

Puerto Rico is a Medicare payment area, not a city. Our Census mapping connects it to 292 cities and communities in Puerto Rico. Some span more than one payment area; confirm with the service ZIP.

  • Aceitunas
  • Adjuntas
  • Aguada
  • Aguadilla
  • Aguas Buenas
  • Aguas Claras
  • Aguilita
  • Aibonito

Browse all communities in Puerto Rico

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 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
RVUs for 58100PPRRVU2026_Oct_nonQPP.csv, line 6,516 (RVU26D)
Geographic factors for Puerto RicoGPCI2026.csv, line 91 (RVU26D)

Open CMS sourceHow we calculate rates

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