CPT code 58100: Endometrial biopsy, without cervical dilation2026 Medicare rate & RVUs in Riverside, CA
Reports office or facility sampling of the uterine lining, with or without endocervical sampling, when the clinician does not dilate the cervix.
In Riverside, CA, Medicare pays $102.85 for 58100 in the office and $55.62 when it’s performed in a hospital or facility.
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.
On this page 11 sections
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 Riverside, CA 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. Riverside, CA pays $102.85. The RVUs are the same everywhere; the geographic indexes change the dollars.
- Riverside, CA · this page$102.85
- Bakersfield, CA · California$101.18−$1.67
- Chico, CA · California$100.58−$2.27
- El Centro, CA · California$100.62−$2.23
- Fresno, CA · California$100.58−$2.27
- Hanford, CA · California$100.58−$2.27
- Los Angeles, CA · California$106.93+$4.08
Other areas in California first, then benchmark localities. Bars start at $0.
Every other payment area
| Payment locality | Office | Facility |
|---|---|---|
| Madera, CACalifornia | $100.58 | $53.36 |
| Merced, CACalifornia | $100.58 | $53.36 |
| Modesto, CACalifornia | $100.58 | $53.36 |
| Napa, CACalifornia | $113.69 | $56.91 |
| Oxnard, CACalifornia | $106.08 | $55.15 |
| Redding, CACalifornia | $100.58 | $53.36 |
| Rest of CaliforniaCalifornia | $100.58 | $53.36 |
| Sacramento, CACalifornia | $104.80 | $54.69 |
| Salinas, CACalifornia | $104.40 | $54.46 |
| San Diego, CACalifornia | $106.32 | $54.78 |
| Marin County, CACalifornia | $119.37 | $58.62 |
| San Francisco, CACalifornia | $119.14 | $58.38 |
| San Benito County, CACalifornia | $122.16 | $60.03 |
| Santa Clara County, CACalifornia | $121.19 | $59.06 |
| San Luis Obispo, CACalifornia | $102.81 | $53.73 |
| Santa Cruz, CACalifornia | $106.90 | $54.55 |
| Santa Maria, CACalifornia | $104.64 | $54.40 |
| Santa Rosa, CACalifornia | $107.93 | $55.02 |
| Stockton, CACalifornia | $100.58 | $53.36 |
| Vallejo, CACalifornia | $113.35 | $56.56 |
| Visalia, CACalifornia | $100.58 | $53.36 |
| Yuba City, CACalifornia | $100.58 | $53.36 |
| Washington, DC areaDistrict of Columbia | $110.33 | $59.58 |
| Miami, FLFlorida | $111.05 | $66.19 |
| Chicago, ILIllinois | $107.82 | $64.51 |
| Manhattan, NYNew York | $113.22 | $63.15 |
| AlaskaAlaska | $118.12 | $72.23 |
| AlabamaAlabama | $88.68 | $50.98 |
| ArkansasArkansas | $87.50 | $50.49 |
| ArizonaArizona | $95.58 | $53.83 |
| ColoradoColorado | $100.45 | $54.60 |
| ConnecticutConnecticut | $104.45 | $58.04 |
| DelawareDelaware | $97.07 | $54.50 |
| Fort Lauderdale, FLFlorida | $104.54 | $60.89 |
| Rest of FloridaFlorida | $99.45 | $58.26 |
| Atlanta, GAGeorgia | $100.56 | $56.78 |
| Rest of GeorgiaGeorgia | $93.95 | $55.52 |
| Hawaii, Guam, HIHawaii | $102.34 | $53.35 |
| IowaIowa | $89.57 | $50.14 |
| IdahoIdaho | $90.36 | $50.72 |
| East St. Louis, ILIllinois | $101.17 | $61.53 |
| Rest of IllinoisIllinois | $97.64 | $58.30 |
| Suburban Chicago, ILIllinois | $105.29 | $61.04 |
| IndianaIndiana | $90.81 | $50.87 |
| KansasKansas | $89.75 | $50.80 |
| KentuckyKentucky | $91.86 | $53.55 |
| New Orleans, LALouisiana | $96.10 | $55.55 |
| Rest of LouisianaLouisiana | $91.95 | $53.82 |
| Metropolitan Boston, MAMassachusetts | $109.09 | $57.64 |
| Rest of MassachusettsMassachusetts | $100.15 | $54.78 |
| Baltimore area, MDMaryland | $104.27 | $58.04 |
| Rest of MarylandMaryland | $98.64 | $55.03 |
| Rest of MaineMaine | $91.41 | $51.77 |
| Southern Maine, MEMaine | $95.14 | $52.45 |
| Detroit, MIMichigan | $101.20 | $59.62 |
| Rest of MichiganMichigan | $94.60 | $55.26 |
| MinnesotaMinnesota | $94.76 | $50.43 |
| Metropolitan Kansas City, MOMissouri | $94.88 | $54.42 |
| Metropolitan St. Louis, MOMissouri | $95.73 | $54.71 |
| Rest of MissouriMissouri | $90.87 | $53.73 |
| MississippiMississippi | $89.17 | $52.07 |
| MontanaMontana | $98.18 | $55.10 |
| North CarolinaNorth Carolina | $92.20 | $52.00 |
| North DakotaNorth Dakota | $94.03 | $50.95 |
| NebraskaNebraska | $89.85 | $50.08 |
| New HampshireNew Hampshire | $99.44 | $54.59 |
| Northern New JerseyNew Jersey | $109.44 | $59.46 |
| Rest of New JerseyNew Jersey | $105.22 | $58.17 |
| New MexicoNew Mexico | $95.31 | $55.80 |
| NevadaNevada | $97.08 | $53.95 |
| NYC suburbs and Long Island, NYNew York | $116.52 | $65.29 |
| Poughkeepsie and northern NYC suburbs, NYNew York | $106.36 | $59.18 |
| Queens, NYNew York | $113.24 | $62.31 |
| Rest of New YorkNew York | $93.53 | $52.59 |
| OhioOhio | $93.75 | $54.41 |
| OklahomaOklahoma | $91.09 | $52.62 |
| Portland, OROregon | $102.78 | $54.91 |
| Rest of OregonOregon | $95.91 | $52.99 |
| Metropolitan Philadelphia, PAPennsylvania | $102.38 | $57.53 |
| Rest of PennsylvaniaPennsylvania | $93.57 | $54.01 |
| Puerto RicoPuerto Rico | $98.66 | $55.10 |
| Rhode IslandRhode Island | $99.90 | $55.39 |
| South CarolinaSouth Carolina | $93.21 | $53.40 |
| South DakotaSouth Dakota | $93.54 | $50.45 |
| TennesseeTennessee | $90.24 | $51.07 |
| Austin, TXTexas | $100.48 | $54.89 |
| Beaumont, TXTexas | $93.04 | $53.83 |
| Brazoria, TXTexas | $96.50 | $53.81 |
| Dallas, TXTexas | $97.35 | $54.44 |
| Fort Worth, TXTexas | $96.92 | $54.44 |
| Galveston, TXTexas | $96.95 | $54.16 |
| Houston, TXTexas | $100.79 | $58.00 |
| Rest of TexasTexas | $94.88 | $53.99 |
| UtahUtah | $94.38 | $53.87 |
| VirginiaVirginia | $95.26 | $52.90 |
| Virgin Islands, VIUnited States Virgin Islands | $98.66 | $55.10 |
| VermontVermont | $94.22 | $51.56 |
| Rest of WashingtonWashington | $99.78 | $54.41 |
| King County, WAWashington | $110.64 | $57.77 |
| WisconsinWisconsin | $91.17 | $49.89 |
| West VirginiaWest Virginia | $94.44 | $57.00 |
| WyomingWyoming | $96.37 | $53.29 |
58100 rates by state
Office rate range in each state. Select a state to see its payment localities.
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
| State / territory | Office rate range | Localities |
|---|---|---|
| AK | $118.12 | 1 |
| AL | $88.68 | 1 |
| AR | $87.50 | 1 |
| AZ | $95.58 | 1 |
| CA | $100.58–$122.16 | 29 |
| CO | $100.45 | 1 |
| CT | $104.45 | 1 |
| DC | $110.33 | 1 |
| DE | $97.07 | 1 |
| FL | $99.45–$111.05 | 3 |
| GA | $93.95–$100.56 | 2 |
| GU | $102.34 | 1 |
| HI | $102.34 | 1 |
| IA | $89.57 | 1 |
| ID | $90.36 | 1 |
| IL | $97.64–$107.82 | 4 |
| IN | $90.81 | 1 |
| KS | $89.75 | 1 |
| KY | $91.86 | 1 |
| LA | $91.95–$96.10 | 2 |
| MA | $100.15–$109.09 | 2 |
| MD | $98.64–$110.33 | 3 |
| ME | $91.41–$95.14 | 2 |
| MI | $94.60–$101.20 | 2 |
| MN | $94.76 | 1 |
| MO | $90.87–$95.73 | 3 |
| MS | $89.17 | 1 |
| MT | $98.18 | 1 |
| NC | $92.20 | 1 |
| ND | $94.03 | 1 |
| NE | $89.85 | 1 |
| NH | $99.44 | 1 |
| NJ | $105.22–$109.44 | 2 |
| NM | $95.31 | 1 |
| NV | $97.08 | 1 |
| NY | $93.53–$116.52 | 5 |
| OH | $93.75 | 1 |
| OK | $91.09 | 1 |
| OR | $95.91–$102.78 | 2 |
| PA | $93.57–$102.38 | 2 |
| PR | $98.66 | 1 |
| RI | $99.90 | 1 |
| SC | $93.21 | 1 |
| SD | $93.54 | 1 |
| TN | $90.24 | 1 |
| TX | $93.04–$100.79 | 8 |
| UT | $94.38 | 1 |
| VA | $95.26–$110.33 | 2 |
| VI | $98.66 | 1 |
| VT | $94.22 | 1 |
| WA | $99.78–$110.64 | 2 |
| WI | $91.17 | 1 |
| WV | $94.44 | 1 |
| WY | $96.37 | 1 |
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
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 Riverside, CA 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
20
- Locality
- Riverside, CA
- Physician work
- 1.018
- Practice expense
- 1.096
- Malpractice
- 0.853
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 1.18 | × 1.018 | 1.2012 |
| Practice expense | 1.55 | × 1.096 | 1.6988 |
| Malpractice | 0.21 | × 0.853 | 0.1791 |
| Total RVUs | 3.0792 | ||
| Conversion factor | × 33.4009 | ||
Office rate, Riverside, CA$102.85
Office: (1.18 × 1.018 + 1.55 × 1.096 + 0.21 × 0.853) × $33.4009 = $102.85
Facility: (1.18 × 1.018 + 0.26 × 1.096 + 0.21 × 0.853) × $33.4009 = $55.62
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
| Rule | CMS value | What it means |
|---|---|---|
| Global period | 000 | Same-day global: pre- and post-op care on the day of the procedure is 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) | 1 | Not paid (statutory restriction). |
| Co-surgeons (62) | 0 | Not permitted. |
| Team surgery (66) | 0 | Not permitted. |
| Professional/technical | 0 | Physician 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%).
How 58100 has changed in Riverside, CA
58100 · Office / nonfacility
$102.85
Effective 2026-10-01
The base rate is $0.82 higher than on 2025-10-01, moving from $102.03 to $102.85 (0.8%).
It is unchanged from the immediately preceding available release, effective 2026-07-01.
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
January 1, 2026
RVU26A
$102.03changed to$102.85
- 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 1.014 changed to 1.018
- Practice expense GPCI 1.093 changed to 1.096
- Malpractice GPCI 0.892 changed to 0.853
Held through RVU26B, RVU26C, RVU26D.
January 1, 2025
RVU25A
$106.81changed to$102.03
- Conversion factor 33.2875 changed to 32.3465
- Practice expense RVU 1.65 changed to 1.60
Held through RVU25B, RVU25C, RVU25D.
March 9, 2024
RVU24AR
$105.07changed to$106.81
- Conversion factor 32.7442 changed to 33.2875
Held through RVU24B, RVU24C, RVU24D.
January 1, 2024
RVU24A
$108.51changed to$105.07
- 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 1.021 changed to 1.014
- Practice expense GPCI 1.079 changed to 1.093
- Malpractice GPCI 0.924 changed to 0.892
January 1, 2023
RVU23A
$110.79changed to$108.51
- Conversion factor 34.6062 changed to 33.8872
- Malpractice RVU 0.20 changed to 0.19
- Work GPCI 1.027 changed to 1.021
- Practice expense GPCI 1.065 changed to 1.079
- Malpractice GPCI 0.955 changed to 0.924
Held through RVU23B, RVU23C, RVU23D.
January 1, 2022
RVU22A
$109.07changed to$110.79
- Conversion factor 34.8931 changed to 34.6062
- Practice expense RVU 1.60 changed to 1.66
- Malpractice GPCI 0.896 changed to 0.955
Held through RVU22B, RVU22C, RVU22D.
January 1, 2021
RVU21A
$104.47changed to$109.07
- 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 1.024 changed to 1.027
- Practice expense GPCI 1.070 changed to 1.065
- Malpractice GPCI 0.830 changed to 0.896
Held through RVU21B, RVU21C, RVU21D.
January 1, 2020
RVU20A
$98.14changed to$104.47
- 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 1.024
- Practice expense GPCI 1.074 changed to 1.070
- Malpractice GPCI 0.753 changed to 0.830
Held through RVU20B, RVU20C, RVU20D.
January 1, 2019
RVU19A
$113.48changed to$98.14
- 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
- Work GPCI 1.020 changed to 1.021
- Malpractice GPCI 0.689 changed to 0.753
Held through RVU19B, RVU19C, RVU19D.
January 1, 2018
RVU18AR1
$113.94changed to$113.48
- Conversion factor 35.8887 changed to 35.9996
- Practice expense RVU 1.38 changed to 1.36
- Work GPCI 1.024 changed to 1.020
- Practice expense GPCI 1.079 changed to 1.074
- Malpractice GPCI 0.626 changed to 0.689
Held through RVU18B, RVU18C, RVU18D.
January 1, 2017
RVU17A
No ratechanged to$113.94
Held through RVU17B, RVU17C, RVU17D.
January 1, 2013
RVU13AR
Earliest loaded release: No rate
Held through RVU13B, RVU13C, RVU13D, RVU14A, RVU14B, RVU14C, RVU14D, RVU15A, RVU15B, RVU15C, RVU15D, RVU16A, RVU16B, RVU16C, RVU16D.
| Effective from | Office | Facility | CMS release |
|---|---|---|---|
| 2026-10-01 | $102.85 | $55.62 | RVU26D |
| 2026-07-01 | $102.85 | $55.62 | RVU26C |
| 2026-04-01 | $102.85 | $55.62 | RVU26B |
| 2026-01-01 | $102.85 | $55.62 | RVU26A |
| 2025-10-01 | $102.03 | $62.43 | RVU25D |
| 2025-07-01 | $102.03 | $62.43 | RVU25C |
| 2025-04-01 | $102.03 | $62.43 | RVU25B |
| 2025-01-01 | $102.03 | $62.43 | RVU25A |
| 2024-10-01 | $106.81 | $64.24 | RVU24D |
| 2024-07-01 | $106.81 | $64.24 | RVU24C |
| 2024-04-01 | $106.81 | $64.24 | RVU24B |
| 2024-03-09 | $106.81 | $64.24 | RVU24AR |
| 2024-01-01 | $105.07 | $63.20 | RVU24A |
| 2023-10-01 | $108.51 | $65.36 | RVU23D |
| 2023-07-01 | $108.51 | $65.36 | RVU23C |
| 2023-04-01 | $108.51 | $65.36 | RVU23B |
| 2023-01-01 | $108.51 | $65.36 | RVU23A |
| 2022-10-01 | $110.79 | $66.94 | RVU22D |
| 2022-07-01 | $110.79 | $66.94 | RVU22C |
| 2022-04-01 | $110.79 | $66.94 | RVU22B |
| 2022-01-01 | $110.79 | $66.94 | RVU22A |
| 2021-10-01 | $109.07 | $67.08 | RVU21D |
| 2021-07-01 | $109.07 | $67.08 | RVU21C |
| 2021-04-01 | $109.07 | $67.08 | RVU21B |
| 2021-01-01 | $109.07 | $67.08 | RVU21A |
| 2020-10-01 | $104.47 | $68.17 | RVU20D |
| 2020-07-01 | $104.47 | $68.17 | RVU20C |
| 2020-04-01 | $104.47 | $68.17 | RVU20B |
| 2020-01-01 | $104.47 | $68.17 | RVU20A |
| 2019-10-01 | $98.14 | $73.75 | RVU19D |
| 2019-07-01 | $98.14 | $73.75 | RVU19C |
| 2019-04-01 | $98.14 | $73.75 | RVU19B |
| 2019-01-01 | $98.14 | $73.75 | RVU19A |
| 2018-10-01 | $113.48 | $90.28 | RVU18D |
| 2018-07-01 | $113.48 | $90.28 | RVU18C |
| 2018-04-01 | $113.48 | $90.28 | RVU18B |
| 2018-01-01 | $113.48 | $90.28 | RVU18AR1 |
| 2017-10-01 | $113.94 | $90.70 | RVU17D |
| 2017-07-01 | $113.94 | $90.70 | RVU17C |
| 2017-04-01 | $113.94 | $90.70 | RVU17B |
| 2017-01-01 | $113.94 | $90.70 | RVU17A |
| 2016-10-01 | Rate data unavailable | Rate data unavailable | RVU16D |
| 2016-07-01 | Rate data unavailable | Rate data unavailable | RVU16C |
| 2016-04-01 | Rate data unavailable | Rate data unavailable | RVU16B |
| 2016-01-01 | Rate data unavailable | Rate data unavailable | RVU16A |
| 2015-10-01 | Rate data unavailable | Rate data unavailable | RVU15D |
| 2015-07-01 | Rate data unavailable | Rate data unavailable | RVU15C |
| 2015-04-01 | Rate data unavailable | Rate data unavailable | RVU15B |
| 2015-01-01 | Rate data unavailable | Rate data unavailable | RVU15A |
| 2014-10-01 | Rate data unavailable | Rate data unavailable | RVU14D |
| 2014-07-01 | Rate data unavailable | Rate data unavailable | RVU14C |
| 2014-04-01 | Rate data unavailable | Rate data unavailable | RVU14B |
| 2014-01-01 | Rate data unavailable | Rate data unavailable | RVU14A |
| 2013-10-01 | Rate data unavailable | Rate data unavailable | RVU13D |
| 2013-07-01 | Rate data unavailable | Rate data unavailable | RVU13C |
| 2013-04-01 | Rate data unavailable | Rate data unavailable | RVU13B |
| 2013-01-01 | Rate data unavailable | Rate data unavailable | RVU13AR |
Where the Riverside, CA rate applies
Riverside, CA is a Medicare payment area, not a city. Our Census mapping connects it to 127 cities and communities in California. Some span more than one payment area; confirm with the service ZIP.
- Ontario
- Riverside
- San Bernardino
- Adelanto
- Aguanga
- Anza
- Apple Valley
- Baker
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
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