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CPT code 45300: Proctosigmoidoscopy, rigid, diagnostic2026 Medicare rate & RVUs in Connecticut

Reports rigid-scope examination of the rectum and distal sigmoid for diagnostic evaluation, including brushing or washing specimen collection when performed.

CMS RVU26DEffective Oct 1, 2026One payment locality13.2K Medicare services in 2024

In Connecticut, Medicare pays $159.17 for 45300 in the office and $47.66 when it’s performed in a hospital or facility.

$159.17Office (non-facility)
$47.66Hospital or facility
+7.1%vs the national office rate ($148.63)

Check a contract rate as a % of Medicare · 45300 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 45300 for the payment locality that covers the ZIP.

On this page 11 sections
  1. Rate in Connecticut
  2. What 45300 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 45300 covers

A physician passes a rigid scope through the anus to examine the rectum and distal sigmoid, commonly to evaluate rectal bleeding, pain, or a suspected distal lesion. Brushing or washing to collect specimens is included when performed. Gastroenterologists and colorectal surgeons may perform the examination in an office or facility setting.

Select this code for a diagnostic rigid examination; a documented biopsy or therapeutic maneuver may call for a different procedure code. The report should identify the indication, examination findings, and any brushing or washing performed. The service 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 is paid in full and others are subject to the standard 50% reduction. Modifier 50 is inappropriate; assistant-at-surgery payment is restricted, and co-surgeon and team-surgery payment 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 45300

Across 109 of 109 payment localities, the office rate for 45300 runs from $129.86 in Arkansas to $201.75 in San Benito County, CA. Connecticut pays $159.17. The RVUs are the same everywhere; the geographic indexes change the dollars.

45300 in Connecticut vs other payment areas
  1. Connecticut · this page$159.17
  2. Los Angeles, CA · California$169.88+$10.71
  3. Washington, DC area · District of Columbia$171.58+$12.41
  4. Miami, FL · Florida$160.12+$0.95
  5. Chicago, IL · Illinois$155.03−$4.14
  6. Manhattan, NY · New York$172.00+$12.83
  7. Alaska · Alaska$167.40+$8.23

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

Every other payment area

45300 in every other Medicare payment locality
Payment localityOfficeFacility
AlabamaAlabama$131.97$41.37
ArkansasArkansas$129.86$40.91
ArizonaArizona$144.34$44.01
Bakersfield, CACalifornia$158.78$45.30
Chico, CACalifornia$158.41$44.93
El Centro, CACalifornia$158.43$44.95
Fresno, CACalifornia$158.41$44.93
Hanford, CACalifornia$158.41$44.93

45300 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.

$129.86

$180.08

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

View every state and territory as a table
45300 office rate range by state
State / territoryOffice rate rangeLocalities
AK$167.401
AL$131.971
AR$129.861
AZ$144.341
CA$158.41–$201.7529
CO$155.561
CT$159.171
DC$171.581
DE$146.911
FL$145.62–$160.123
GA$136.70–$151.482
GU$163.001
HI$163.001
IA$135.971
ID$136.891
IL$140.79–$155.364
IN$137.771
KS$135.131
KY$135.141
LA$134.85–$142.252
MA$154.44–$172.162
MD$149.96–$171.583
ME$137.53–$145.972
MI$138.91–$147.472
MN$149.011
MO$132.20–$142.973
MS$131.071
MT$148.631
NC$139.141
ND$146.051
NE$136.831
NH$152.941
NJ$160.98–$169.492
NM$139.691
NV$148.031
NY$141.43–$176.375
OH$138.381
OK$135.011
OR$146.87–$161.062
PA$138.70–$154.792
PR$149.871
RI$152.561
SC$139.001
SD$145.751
TN$135.861
TX$137.68–$155.058
UT$141.101
VA$145.35–$171.582
VI$149.871
VT$145.311
WA$154.20–$175.982
WI$140.661
WV$135.021
WY$147.511

See 45300 in every payment locality

How the 45300 rate is calculated

Each of 45300’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 · 45300

RVUs × geographic indexes × conversion factor

Office or facility?

Work0.78

0.78 RVUs× 1.000 GPCI

Practice expense3.54

3.54 RVUs× 1.000 GPCI

Malpractice0.13

0.13 RVUs× 1.000 GPCI

Adjusted RVUs

4.4500

Conversion factor

$33.4009

Medicare rate

$148.63

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

5,487

Code
45300
Physician work
0.78
Practice expense
3.54
Malpractice
0.13

GPCI2026.csv

38

Locality
Connecticut
Physician work
1.020
Practice expense
1.077
Malpractice
1.210
Office calculation for 45300 in Connecticut
ComponentRVULocality factorAdjusted
Physician work0.78× 1.0200.7956
Practice expense3.54× 1.0773.8126
Malpractice0.13× 1.2100.1573
Total RVUs4.7655
Conversion factor× 33.4009

Office rate, Connecticut$159.17

Office: (0.78 × 1.02 + 3.54 × 1.077 + 0.13 × 1.21) × $33.4009 = $159.17

Facility: (0.78 × 1.02 + 0.44 × 1.077 + 0.13 × 1.21) × $33.4009 = $47.66

Open 45300 in the RVU calculator

Payment rules and modifiers for 45300

The CMS indicators that decide how 45300 is paid alongside other services.

CMS payment indicators · 45300

Proctosigmoidoscopy, rigid, diagnostic

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

45300 without 51 · national office

$148.63

Proctosigmoidoscopy, rigid, diagnostic

45300-51 · Second procedure: 50%

$74.32

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 45300

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

Codes related to 45300
CodeHow it relatesOffice range, Connecticut
Same family
45305Proctosigmoidoscopy, rigid scope with biopsyRigid proctosigmoidoscopy with biopsy rather than diagnostic examination alone.$212.43
45303Proctosigmoidoscopy, dilation of a narrowingRigid proctosigmoidoscopy with dilation.$1,102.78
Used instead
45330Flexible sigmoidoscopy, diagnosticDiagnostic examination using a flexible sigmoidoscope instead of a rigid scope.$230.64

How 45300 has changed in Connecticut

45300 · Office / nonfacility

$159.17

Effective 2026-10-01

The base rate is $23.54 higher than on 2025-10-01, moving from $135.63 to $159.17 (17.4%).

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

    $135.63changed to$159.17

    • Conversion factor 32.3465 changed to 33.4009
    • Work RVU 0.80 changed to 0.78
    • Practice expense RVU 2.95 changed to 3.54
    • 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

    $138.48changed to$135.63

    • Conversion factor 33.2875 changed to 32.3465
    • Practice expense RVU 2.92 changed to 2.95

    Held through RVU25B, RVU25C, RVU25D.

  3. March 9, 2024

    RVU24AR

    $136.22changed to$138.48

    • Conversion factor 32.7442 changed to 33.2875

    Held through RVU24B, RVU24C, RVU24D.

  4. January 1, 2024

    RVU24A

    $142.44changed to$136.22

    • Conversion factor 33.8872 changed to 32.7442
    • Practice expense RVU 2.95 changed to 2.92
    • Malpractice RVU 0.12 changed to 0.13
    • 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

    $147.15changed to$142.44

    • Conversion factor 34.6062 changed to 33.8872
    • Practice expense RVU 2.98 changed to 2.95
    • Malpractice RVU 0.11 changed to 0.12
    • 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

    $149.41changed to$147.15

    • Conversion factor 34.8931 changed to 34.6062
    • Practice expense RVU 2.99 changed to 2.98
    • Malpractice RVU 0.13 changed to 0.11

    Held through RVU22B, RVU22C, RVU22D.

  7. January 1, 2021

    RVU21A

    $138.89changed to$149.41

    • Conversion factor 36.0896 changed to 34.8931
    • Practice expense RVU 2.61 changed to 2.99
    • Malpractice RVU 0.11 changed to 0.13
    • 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

    $137.11changed to$138.89

    • Conversion factor 36.0391 changed to 36.0896
    • Practice expense RVU 2.54 changed to 2.61
    • Malpractice RVU 0.13 changed to 0.11
    • 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

    $141.36changed to$137.11

    • Conversion factor 35.9996 changed to 36.0391
    • Practice expense RVU 2.65 changed to 2.54

    Held through RVU19B, RVU19C, RVU19D.

  10. January 1, 2018

    RVU18AR1

    $138.60changed to$141.36

    • Conversion factor 35.8887 changed to 35.9996
    • Practice expense RVU 2.58 changed to 2.65
    • 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

    $138.22changed to$138.60

    • Conversion factor 35.8043 changed to 35.8887
    • Practice expense RVU 2.57 changed to 2.58
    • 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

    $139.88changed to$138.22

    • Conversion factor 35.9335 changed to 35.8043
    • Practice expense RVU 2.61 changed to 2.57
    • Malpractice RVU 0.12 changed to 0.13

    Held through RVU16B, RVU16C, RVU16D.

  13. July 1, 2015

    RVU15C

    $139.19changed to$139.88

    • Conversion factor 35.7547 changed to 35.9335

    Held through RVU15D.

  14. January 1, 2015

    RVU15A

    $136.95changed to$139.19

    • Conversion factor 35.8228 changed to 35.7547
    • Practice expense RVU 2.57 changed to 2.61
    • Malpractice RVU 0.11 changed to 0.12
    • 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

    $142.06changed to$136.95

    • Conversion factor 34.0230 changed to 35.8228
    • Practice expense RVU 2.89 changed to 2.57
    • Malpractice RVU 0.12 changed to 0.11
    • 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: $142.06

    Held through RVU13B, RVU13C, RVU13D.

Rates in every CMS release
Effective fromOfficeFacilityCMS release
2026-10-01$159.17$47.66RVU26D
2026-07-01$159.17$47.66RVU26C
2026-04-01$159.17$47.66RVU26B
2026-01-01$159.17$47.66RVU26A
2025-10-01$135.63$50.23RVU25D
2025-07-01$135.63$50.23RVU25C
2025-04-01$135.63$50.23RVU25B
2025-01-01$135.63$50.23RVU25A
2024-10-01$138.48$50.96RVU24D
2024-07-01$138.48$50.96RVU24C
2024-04-01$138.48$50.96RVU24B
2024-03-09$138.48$50.96RVU24AR
2024-01-01$136.22$50.13RVU24A
2023-10-01$142.44$51.32RVU23D
2023-07-01$142.44$51.32RVU23C
2023-04-01$142.44$51.32RVU23B
2023-01-01$142.44$51.32RVU23A
2022-10-01$147.15$51.15RVU22D
2022-07-01$147.15$51.15RVU22C
2022-04-01$147.15$51.15RVU22B
2022-01-01$147.15$51.15RVU22A
2021-10-01$149.41$51.84RVU21D
2021-07-01$149.41$51.84RVU21C
2021-04-01$149.41$51.84RVU21B
2021-01-01$149.41$51.84RVU21A
2020-10-01$138.89$52.93RVU20D
2020-07-01$138.89$52.93RVU20C
2020-04-01$138.89$52.93RVU20B
2020-01-01$138.89$52.93RVU20A
2019-10-01$137.11$54.55RVU19D
2019-07-01$137.11$54.55RVU19C
2019-04-01$137.11$54.55RVU19B
2019-01-01$137.11$54.55RVU19A
2018-10-01$141.36$60.90RVU18D
2018-07-01$141.36$60.90RVU18C
2018-04-01$141.36$60.90RVU18B
2018-01-01$141.36$60.90RVU18AR1
2017-10-01$138.60$60.83RVU17D
2017-07-01$138.60$60.83RVU17C
2017-04-01$138.60$60.83RVU17B
2017-01-01$138.60$60.83RVU17A
2016-10-01$138.22$60.35RVU16D
2016-07-01$138.22$60.35RVU16C
2016-04-01$138.22$60.35RVU16B
2016-01-01$138.22$60.35RVU16A
2015-10-01$139.88$60.53RVU15D
2015-07-01$139.88$60.53RVU15C
2015-04-01$139.19$60.23RVU15B
2015-01-01$139.19$60.23RVU15A
2014-10-01$136.95$59.79RVU14D
2014-07-01$136.95$59.79RVU14C
2014-04-01$136.95$59.79RVU14B
2014-01-01$136.95$59.79RVU14A
2013-10-01$142.06$59.73RVU13D
2013-07-01$142.06$59.73RVU13C
2013-04-01$142.06$59.73RVU13B
2013-01-01$142.06$59.73RVU13AR

Price 45300 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

45300 billing questions

How does 45300 differ from diagnostic flexible sigmoidoscopy?

45300 is for examination with a rigid scope. Use 45330 when the examination is performed with a flexible sigmoidoscope.

Can brushing or washing be reported separately?

No. Brushing or washing specimen collection is included in 45300 when performed.

Can a biopsy be reported as 45300?

No. A biopsy is a distinct service; 45305 describes rigid proctosigmoidoscopy with biopsy.

What should the procedure note support?

Document the diagnostic indication, rigid scope examination and findings, and whether brushing or washing was performed.

How does the multiple-procedure rule affect payment?

For procedures in the same session, the highest-valued procedure is paid in full and the others are subject to the standard 50% 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
RVUs for 45300PPRRVU2026_Oct_nonQPP.csv, line 5,487 (RVU26D)
Geographic factors for ConnecticutGPCI2026.csv, line 38 (RVU26D)

Open CMS sourceHow we calculate rates

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