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

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 Connecticut, Medicare pays $104.45 for 58100 in the office and $58.04 when it’s performed in a hospital or facility.

$104.45Office (non-facility)
$58.04Hospital or facility
+6.4%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 Connecticut
  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 Connecticut 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. Connecticut pays $104.45. The RVUs are the same everywhere; the geographic indexes change the dollars.

58100 in Connecticut vs other payment areas
  1. Connecticut · this page$104.45
  2. Los Angeles, CA · California$106.93+$2.48
  3. Washington, DC area · District of Columbia$110.33+$5.88
  4. Miami, FL · Florida$111.05+$6.60
  5. Chicago, IL · Illinois$107.82+$3.37
  6. Manhattan, NY · New York$113.22+$8.77
  7. Alaska · Alaska$118.12+$13.67

Other areas in Connecticut 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 Connecticut 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

38

Locality
Connecticut
Physician work
1.020
Practice expense
1.077
Malpractice
1.210
Office calculation for 58100 in Connecticut
ComponentRVULocality factorAdjusted
Physician work1.18× 1.0201.2036
Practice expense1.55× 1.0771.6693
Malpractice0.21× 1.2100.2541
Total RVUs3.1270
Conversion factor× 33.4009

Office rate, Connecticut$104.45

Office: (1.18 × 1.02 + 1.55 × 1.077 + 0.21 × 1.21) × $33.4009 = $104.45

Facility: (1.18 × 1.02 + 0.26 × 1.077 + 0.21 × 1.21) × $33.4009 = $58.04

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, Connecticut
Used instead
58110Endometrial biopsy, performed with colposcopyFor endometrial sampling performed with colposcopy; it is an add-on to the applicable primary procedure.$54.23
58120Dilation and curettage, diagnostic or therapeutic, nonobstetricDescribes dilation and curettage rather than sampling without cervical dilation.$317.46
Often billed with
57500Cervical biopsy, tissue sampling or lesion excisionMay be reported for a separately performed biopsy of a cervical lesion.$161.66

How 58100 has changed in Connecticut

58100 · Office / nonfacility

$104.45

Effective 2026-10-01

The base rate is $0.18 higher than on 2025-10-01, moving from $104.27 to $104.45 (0.2%).

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

    $104.27changed to$104.45

    • 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
    • Work GPCI 1.022 changed to 1.020
    • Practice expense GPCI 1.091 changed to 1.077
    • Malpractice GPCI 1.207 changed to 1.210

    Held through RVU26B, RVU26C, RVU26D.

  2. January 1, 2025

    RVU25A

    $109.12changed to$104.27

    • 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

    $107.34changed to$109.12

    • Conversion factor 32.7442 changed to 33.2875

    Held through RVU24B, RVU24C, RVU24D.

  4. January 1, 2024

    RVU24A

    $111.11changed to$107.34

    • 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
    • Work GPCI 1.030 changed to 1.022
    • Practice expense GPCI 1.102 changed to 1.091
    • Malpractice GPCI 1.070 changed to 1.207

  5. January 1, 2023

    RVU23A

    $113.88changed to$111.11

    • Conversion factor 34.6062 changed to 33.8872
    • Malpractice RVU 0.20 changed to 0.19
    • Work GPCI 1.037 changed to 1.030
    • Practice expense GPCI 1.114 changed to 1.102
    • Malpractice GPCI 0.934 changed to 1.070

    Held through RVU23B, RVU23C, RVU23D.

  6. January 1, 2022

    RVU22A

    $112.49changed to$113.88

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

    Held through RVU22B, RVU22C, RVU22D.

  7. January 1, 2021

    RVU21A

    $108.67changed to$112.49

    • 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
    • Work GPCI 1.029 changed to 1.037
    • Practice expense GPCI 1.113 changed to 1.114
    • Malpractice GPCI 1.094 changed to 0.934

    Held through RVU21B, RVU21C, RVU21D.

  8. January 1, 2020

    RVU20A

    $102.60changed to$108.67

    • 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
    • Work GPCI 1.021 changed to 1.029
    • Practice expense GPCI 1.112 changed to 1.113
    • Malpractice GPCI 1.255 changed to 1.094

    Held through RVU20B, RVU20C, RVU20D.

  9. January 1, 2019

    RVU19A

    $119.26changed to$102.60

    • 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.

  10. January 1, 2018

    RVU18AR1

    $119.98changed to$119.26

    • Conversion factor 35.8887 changed to 35.9996
    • Practice expense RVU 1.38 changed to 1.36
    • Work GPCI 1.023 changed to 1.021
    • Practice expense GPCI 1.117 changed to 1.112
    • Malpractice GPCI 1.244 changed to 1.255

    Held through RVU18B, RVU18C, RVU18D.

  11. January 1, 2017

    RVU17A

    $119.46changed to$119.98

    • Conversion factor 35.8043 changed to 35.8887
    • Practice expense RVU 1.37 changed to 1.38
    • Work GPCI 1.024 changed to 1.023
    • Practice expense GPCI 1.121 changed to 1.117
    • Malpractice GPCI 1.232 changed to 1.244

    Held through RVU17B, RVU17C, RVU17D.

  12. January 1, 2016

    RVU16A

    $119.89changed to$119.46

    • Conversion factor 35.9335 changed to 35.8043

    Held through RVU16B, RVU16C, RVU16D.

  13. July 1, 2015

    RVU15C

    $119.30changed to$119.89

    • Conversion factor 35.7547 changed to 35.9335

    Held through RVU15D.

  14. January 1, 2015

    RVU15A

    $121.55changed to$119.30

    • 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 1.116 changed to 1.121
    • Malpractice GPCI 1.234 changed to 1.232

    Held through RVU15B.

  15. January 1, 2014

    RVU14A

    $120.50changed to$121.55

    • 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 1.110 changed to 1.116
    • Malpractice GPCI 1.235 changed to 1.234

    Held through RVU14B, RVU14C, RVU14D.

  16. January 1, 2013

    RVU13AR

    Earliest loaded release: $120.50

    Held through RVU13B, RVU13C, RVU13D.

Rates in every CMS release
Effective fromOfficeFacilityCMS release
2026-10-01$104.45$58.04RVU26D
2026-07-01$104.45$58.04RVU26C
2026-04-01$104.45$58.04RVU26B
2026-01-01$104.45$58.04RVU26A
2025-10-01$104.27$64.75RVU25D
2025-07-01$104.27$64.75RVU25C
2025-04-01$104.27$64.75RVU25B
2025-01-01$104.27$64.75RVU25A
2024-10-01$109.12$66.63RVU24D
2024-07-01$109.12$66.63RVU24C
2024-04-01$109.12$66.63RVU24B
2024-03-09$109.12$66.63RVU24AR
2024-01-01$107.34$65.54RVU24A
2023-10-01$111.11$67.05RVU23D
2023-07-01$111.11$67.05RVU23C
2023-04-01$111.11$67.05RVU23B
2023-01-01$111.11$67.05RVU23A
2022-10-01$113.88$68.01RVU22D
2022-07-01$113.88$68.01RVU22C
2022-04-01$113.88$68.01RVU22B
2022-01-01$113.88$68.01RVU22A
2021-10-01$112.49$68.57RVU21D
2021-07-01$112.49$68.57RVU21C
2021-04-01$112.49$68.57RVU21B
2021-01-01$112.49$68.57RVU21A
2020-10-01$108.67$70.91RVU20D
2020-07-01$108.67$70.91RVU20C
2020-04-01$108.67$70.91RVU20B
2020-01-01$108.67$70.91RVU20A
2019-10-01$102.60$77.36RVU19D
2019-07-01$102.60$77.36RVU19C
2019-04-01$102.60$77.36RVU19B
2019-01-01$102.60$77.36RVU19A
2018-10-01$119.26$95.24RVU18D
2018-07-01$119.26$95.24RVU18C
2018-04-01$119.26$95.24RVU18B
2018-01-01$119.26$95.24RVU18AR1
2017-10-01$119.98$95.92RVU17D
2017-07-01$119.98$95.92RVU17C
2017-04-01$119.98$95.92RVU17B
2017-01-01$119.98$95.92RVU17A
2016-10-01$119.46$95.38RVU16D
2016-07-01$119.46$95.38RVU16C
2016-04-01$119.46$95.38RVU16B
2016-01-01$119.46$95.38RVU16A
2015-10-01$119.89$95.73RVU15D
2015-07-01$119.89$95.73RVU15C
2015-04-01$119.30$95.25RVU15B
2015-01-01$119.30$95.25RVU15A
2014-10-01$121.55$98.36RVU14D
2014-07-01$121.55$98.36RVU14C
2014-04-01$121.55$98.36RVU14B
2014-01-01$121.55$98.36RVU14A
2013-10-01$120.50$95.95RVU13D
2013-07-01$120.50$95.95RVU13C
2013-04-01$120.50$95.95RVU13B
2013-01-01$120.50$95.95RVU13AR

Price 58100 for an earlier date of service

Where the Connecticut rate applies

Connecticut is a Medicare payment area, not a city. Our Census mapping connects it to 215 cities and communities in Connecticut. Some span more than one payment area; confirm with the service ZIP.

  • Ansonia
  • Ball Pond
  • Baltic
  • Bantam
  • Bethel
  • Bethlehem Village
  • Bigelow Corners
  • Blue Hills

Browse all communities in Connecticut

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 ConnecticutGPCI2026.csv, line 38 (RVU26D)

Open CMS sourceHow we calculate rates

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