FeeBase
Log inGet started
Menu

HCPCS code G0104: Flexible sigmoidoscopy, colorectal cancer screening2026 Medicare rate & RVUs in Oxnard, CA

Report G0104 for a Medicare colorectal cancer screening performed with a flexible sigmoidoscope to examine the rectum and distal colon.

CMS RVU26DEffective Oct 1, 2026One payment locality3.8K Medicare services in 2024

In Oxnard, CA, Medicare pays $247.58 for G0104 in the office and $56.90 when it’s performed in a hospital or facility.

$247.58Office (non-facility)
$56.90Hospital or facility
+15.3%vs the national office rate ($214.77)

Check a contract rate as a % of Medicare · G0104 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 G0104 for the payment locality that covers the ZIP.

On this page 11 sections
  1. Rate in Oxnard, CA
  2. What G0104 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 G0104 covers

G0104 represents a colorectal cancer screening examination using a flexible scope to inspect the rectum and sigmoid colon. It is intended for screening rather than evaluation of symptoms. Gastroenterologists, colorectal surgeons, and other qualified physicians commonly perform the procedure in an outpatient endoscopy center or hospital department. The record should identify the screening purpose, the procedure performed, its findings, and any intervention.

Report one screening procedure, supported by documentation of the clinical indication and examination. The code has a 0-day global period, so routine same-day preoperative and postoperative care is included. When other procedures subject to the CMS multiple-procedure reduction occur in the same session, the highest-valued procedure is paid in full and the others at 50%. Modifier 50 is inappropriate for this single endoscopic service. Medicare does not pay an assistant at surgery for this code; 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 Oxnard, CA compares for G0104

Across 109 of 109 payment localities, the office rate for G0104 runs from $187.08 in Arkansas to $297.27 in San Benito County, CA. Oxnard, CA pays $247.58. The RVUs are the same everywhere; the geographic indexes change the dollars.

G0104 in Oxnard, CA vs other payment areas
  1. Oxnard, CA · this page$247.58
  2. Bakersfield, CA · California$231.49−$16.09
  3. Chico, CA · California$231.16−$16.42
  4. El Centro, CA · California$231.18−$16.40
  5. Fresno, CA · California$231.16−$16.42
  6. Hanford, CA · California$231.16−$16.42
  7. Los Angeles, CA · California$248.27+$0.69

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

Every other payment area

G0104 in every other Medicare payment locality
Payment localityOfficeFacility
Madera, CACalifornia$231.16$54.35
Merced, CACalifornia$231.16$54.35
Modesto, CACalifornia$231.16$54.35
Napa, CACalifornia$273.10$60.48
Redding, CACalifornia$231.16$54.35
Rest of CaliforniaCalifornia$231.16$54.35
Riverside, CACalifornia$232.36$55.54
Sacramento, CACalifornia$243.99$56.37

G0104 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.

$187.08

$264.22

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

View every state and territory as a table
G0104 office rate range by state
State / territoryOffice rate rangeLocalities
AK$238.751
AL$190.211
AR$187.081
AZ$208.541
CA$231.16–$297.2729
CO$226.051
CT$230.231
DC$249.361
DE$212.331
FL$208.53–$227.923
GA$195.63–$218.532
GU$238.391
HI$238.391
IA$196.941
ID$198.141
IL$200.85–$222.764
IN$199.471
KS$195.311
KY$194.061
LA$193.49–$204.432
MA$224.20–$251.132
MD$216.94–$249.363
ME$198.68–$211.762
MI$199.26–$210.862
MN$217.511
MO$189.32–$205.963
MS$188.271
MT$214.761
NC$201.131
ND$212.591
NE$198.341
NH$221.841
NJ$233.12–$246.142
NM$200.261
NV$214.341
NY$204.49–$254.395
OH$198.811
OK$194.291
OR$212.94–$234.662
PA$199.50–$223.502
PR$216.731
RI$220.951
SC$200.261
SD$212.331
TN$196.351
TX$197.97–$225.068
UT$203.371
VA$210.56–$249.362
VI$216.731
VT$211.121
WA$223.98–$257.172
WI$204.511
WV$192.291
WY$213.811

See G0104 in every payment locality

How the G0104 rate is calculated

Each of G0104’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 · G0104

RVUs × geographic indexes × conversion factor

Office or facility?

Work0.82

0.82 RVUs× 1.000 GPCI

Practice expense5.50

5.50 RVUs× 1.000 GPCI

Malpractice0.11

0.11 RVUs× 1.000 GPCI

Adjusted RVUs

6.4300

Conversion factor

$33.4009

Medicare rate

$214.77

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

The exact Oxnard, CA inputs and CMS source lines

PPRRVU2026_Oct_nonQPP.csv

15,086

Code
G0104
Physician work
0.82
Practice expense
5.50
Malpractice
0.11

GPCI2026.csv

18

Locality
Oxnard, CA
Physician work
1.028
Practice expense
1.182
Malpractice
0.623
Office calculation for G0104 in Oxnard, CA
ComponentRVULocality factorAdjusted
Physician work0.82× 1.0280.8430
Practice expense5.50× 1.1826.5010
Malpractice0.11× 0.6230.0685
Total RVUs7.4125
Conversion factor× 33.4009

Office rate, Oxnard, CA$247.58

Office: (0.82 × 1.028 + 5.5 × 1.182 + 0.11 × 0.623) × $33.4009 = $247.58

Facility: (0.82 × 1.028 + 0.67 × 1.182 + 0.11 × 0.623) × $33.4009 = $56.90

Open G0104 in the RVU calculator

Payment rules and modifiers for G0104

The CMS indicators that decide how G0104 is paid alongside other services.

CMS payment indicators · G0104

Flexible sigmoidoscopy, colorectal cancer screening

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

G0104 without 51 · national office

$214.77

Flexible sigmoidoscopy, colorectal cancer screening

G0104-51 · Second procedure: 50%

$107.39

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 G0104

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

Codes related to G0104
CodeHow it relatesOffice range, Oxnard, CA
Used instead
G0105Screening colonoscopy, high-risk individualColorectal screening by colonoscopy for a high-risk patient.$422.90
G0121Screening colonoscopy, not high riskColorectal screening by colonoscopy for a patient not classified as high risk.$423.11
45330Flexible sigmoidoscopy, diagnosticDiagnostic flexible sigmoidoscopy, rather than screening.$247.79
45331Sigmoidoscopy, with biopsyDiagnostic flexible sigmoidoscopy when biopsy is performed.$373.45

How G0104 has changed in Oxnard, CA

G0104 · Office / nonfacility

$247.58

Effective 2026-10-01

The base rate is $41.15 higher than on 2025-10-01, moving from $206.43 to $247.58 (19.9%).

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

    $206.43changed to$247.58

    • Conversion factor 32.3465 changed to 33.4009
    • Work RVU 0.84 changed to 0.82
    • Practice expense RVU 4.60 changed to 5.50
    • Malpractice RVU 0.12 changed to 0.11
    • Work GPCI 1.026 changed to 1.028
    • Practice expense GPCI 1.183 changed to 1.182
    • Malpractice GPCI 0.651 changed to 0.623

    Held through RVU26B, RVU26C, RVU26D.

  2. January 1, 2025

    RVU25A

    $213.61changed to$206.43

    • Conversion factor 33.2875 changed to 32.3465
    • Practice expense RVU 4.63 changed to 4.60

    Held through RVU25B, RVU25C, RVU25D.

  3. March 9, 2024

    RVU24AR

    $210.13changed to$213.61

    • Conversion factor 32.7442 changed to 33.2875

    Held through RVU24B, RVU24C, RVU24D.

  4. January 1, 2024

    RVU24A

    $217.50changed to$210.13

    • Conversion factor 33.8872 changed to 32.7442
    • Practice expense RVU 4.64 changed to 4.63
    • Malpractice RVU 0.11 changed to 0.12
    • Work GPCI 1.027 changed to 1.026
    • Practice expense GPCI 1.181 changed to 1.183
    • Malpractice GPCI 0.689 changed to 0.651

  5. January 1, 2023

    RVU23A

    $225.20changed to$217.50

    • Conversion factor 34.6062 changed to 33.8872
    • Practice expense RVU 4.72 changed to 4.64
    • Practice expense GPCI 1.179 changed to 1.181
    • Malpractice GPCI 0.726 changed to 0.689

    Held through RVU23B, RVU23C, RVU23D.

  6. January 1, 2022

    RVU22A

    $224.18changed to$225.20

    • Conversion factor 34.8931 changed to 34.6062
    • Practice expense RVU 4.65 changed to 4.72

    Held through RVU22B, RVU22C, RVU22D.

  7. January 1, 2021

    RVU21A

    $205.21changed to$224.18

    • Conversion factor 36.0896 changed to 34.8931
    • Practice expense RVU 4.03 changed to 4.65
    • Work GPCI 1.026 changed to 1.027
    • Practice expense GPCI 1.178 changed to 1.179
    • Malpractice GPCI 0.700 changed to 0.726

    Held through RVU21B, RVU21C, RVU21D.

  8. January 1, 2020

    RVU20A

    $200.05changed to$205.21

    • Conversion factor 36.0391 changed to 36.0896
    • Practice expense RVU 3.92 changed to 4.03
    • Malpractice RVU 0.12 changed to 0.11
    • Work GPCI 1.024 changed to 1.026
    • Practice expense GPCI 1.176 changed to 1.178
    • Malpractice GPCI 0.673 changed to 0.700

    Held through RVU20B, RVU20C, RVU20D.

  9. January 1, 2019

    RVU19A

    $196.86changed to$200.05

    • Conversion factor 35.9996 changed to 36.0391
    • Practice expense RVU 3.85 changed to 3.92

    Held through RVU19B, RVU19C, RVU19D.

  10. January 1, 2018

    RVU18AR1

    $194.01changed to$196.86

    • Conversion factor 35.8887 changed to 35.9996
    • Practice expense RVU 3.78 changed to 3.85
    • Work GPCI 1.027 changed to 1.024
    • Practice expense GPCI 1.178 changed to 1.176
    • Malpractice GPCI 0.754 changed to 0.673

    Held through RVU18B, RVU18C, RVU18D.

  11. January 1, 2017

    RVU17A

    $194.26changed to$194.01

    • Conversion factor 35.8043 changed to 35.8887
    • Work GPCI 1.030 changed to 1.027
    • Practice expense GPCI 1.180 changed to 1.178
    • Malpractice GPCI 0.834 changed to 0.754

    Held through RVU17B, RVU17C, RVU17D.

  12. January 1, 2016

    RVU16A

    $158.75changed to$194.26

    • Conversion factor 35.9335 changed to 35.8043
    • Work RVU 0.96 changed to 0.84
    • Practice expense RVU 2.80 changed to 3.78
    • Malpractice RVU 0.15 changed to 0.12

    Held through RVU16B, RVU16C, RVU16D.

  13. July 1, 2015

    RVU15C

    $157.96changed to$158.75

    • Conversion factor 35.7547 changed to 35.9335

    Held through RVU15D.

  14. January 1, 2015

    RVU15A

    $156.63changed to$157.96

    • Conversion factor 35.8228 changed to 35.7547
    • Practice expense RVU 2.77 changed to 2.80
    • Malpractice RVU 0.13 changed to 0.15
    • Work GPCI 1.032 changed to 1.030
    • Practice expense GPCI 1.187 changed to 1.180
    • Malpractice GPCI 0.720 changed to 0.834

    Held through RVU15B.

  15. January 1, 2014

    RVU14A

    $165.32changed to$156.63

    • Conversion factor 34.0230 changed to 35.8228
    • Practice expense RVU 3.17 changed to 2.77
    • Malpractice RVU 0.14 changed to 0.13
    • Work GPCI 1.034 changed to 1.032
    • Practice expense GPCI 1.193 changed to 1.187
    • Malpractice GPCI 0.605 changed to 0.720

    Held through RVU14B, RVU14C, RVU14D.

  16. October 1, 2013

    RVU13D

    No ratechanged to$165.32

  17. January 1, 2013

    RVU13AR

    Earliest loaded release: No rate

    Held through RVU13B, RVU13C.

Rates in every CMS release
Effective fromOfficeFacilityCMS release
2026-10-01$247.58$56.90RVU26D
2026-07-01$247.58$56.90RVU26C
2026-04-01$247.58$56.90RVU26B
2026-01-01$247.58$56.90RVU26A
2025-10-01$206.43$58.72RVU25D
2025-07-01$206.43$58.72RVU25C
2025-04-01$206.43$58.72RVU25B
2025-01-01$206.43$58.72RVU25A
2024-10-01$213.61$60.04RVU24D
2024-07-01$213.61$60.04RVU24C
2024-04-01$213.61$60.04RVU24B
2024-03-09$213.61$60.04RVU24AR
2024-01-01$210.13$59.06RVU24A
2023-10-01$217.50$59.82RVU23D
2023-07-01$217.50$59.82RVU23C
2023-04-01$217.50$59.82RVU23B
2023-01-01$217.50$59.82RVU23A
2022-10-01$225.20$60.77RVU22D
2022-07-01$225.20$60.77RVU22C
2022-04-01$225.20$60.77RVU22B
2022-01-01$225.20$60.77RVU22A
2021-10-01$224.18$60.45RVU21D
2021-07-01$224.18$60.45RVU21C
2021-04-01$224.18$60.45RVU21B
2021-01-01$224.18$60.45RVU21A
2020-10-01$205.21$61.94RVU20D
2020-07-01$205.21$61.94RVU20C
2020-04-01$205.21$61.94RVU20B
2020-01-01$205.21$61.94RVU20A
2019-10-01$200.05$62.31RVU19D
2019-07-01$200.05$62.31RVU19C
2019-04-01$200.05$62.31RVU19B
2019-01-01$200.05$62.31RVU19A
2018-10-01$196.86$62.66RVU18D
2018-07-01$196.86$62.66RVU18C
2018-04-01$196.86$62.66RVU18B
2018-01-01$196.86$62.66RVU18AR1
2017-10-01$194.01$62.96RVU17D
2017-07-01$194.01$62.96RVU17C
2017-04-01$194.01$62.96RVU17B
2017-01-01$194.01$62.96RVU17A
2016-10-01$194.26$62.87RVU16D
2016-07-01$194.26$62.87RVU16C
2016-04-01$194.26$62.87RVU16B
2016-01-01$194.26$62.87RVU16A
2015-10-01$158.75$70.56RVU15D
2015-07-01$158.75$70.56RVU15C
2015-04-01$157.96$70.20RVU15B
2015-01-01$157.96$70.20RVU15A
2014-10-01$156.63$69.46RVU14D
2014-07-01$156.63$69.46RVU14C
2014-04-01$156.63$69.46RVU14B
2014-01-01$156.63$69.46RVU14A
2013-10-01$165.32$69.94RVU13D
2013-07-01Rate data unavailableRate data unavailableRVU13C
2013-04-01Rate data unavailableRate data unavailableRVU13B
2013-01-01Rate data unavailableRate data unavailableRVU13AR

Price G0104 for an earlier date of service

Where the Oxnard, CA rate applies

Oxnard, CA is a Medicare payment area, not a city. Our Census mapping connects it to 26 cities and communities in California. Some span more than one payment area; confirm with the service ZIP.

  • Oxnard
  • Thousand Oaks
  • Bell Canyon
  • Camarillo
  • Casa Conejo
  • Channel Islands Beach
  • El Rio
  • Fillmore

Browse all communities in California

G0104 billing questions

How is G0104 different from a diagnostic flexible sigmoidoscopy?

G0104 is for a colorectal cancer screening examination. Use a diagnostic sigmoidoscopy code, such as 45330, when the procedure is performed to investigate a symptom or other diagnostic indication.

Should modifier 50 be reported?

No. This is a single endoscopic screening service, not a bilateral procedure; modifier 50 is inappropriate.

Is routine same-day evaluation separately included?

Routine same-day preoperative and postoperative care is included under the 0-day global period.

What happens when another procedure is performed in the same session?

Under the CMS multiple-procedure reduction, the highest-valued procedure is paid in full and the other qualifying procedures are paid at 50%.

What documentation supports G0104?

Document the screening purpose, the flexible sigmoidoscopy performed, its findings, and any intervention. If the procedure is diagnostic rather than screening, select the code that represents the diagnostic service.

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 G0104PPRRVU2026_Oct_nonQPP.csv, line 15,086 (RVU26D)
Geographic factors for Oxnard, CAGPCI2026.csv, line 18 (RVU26D)

Open CMS sourceHow we calculate rates

Did this answer your question about what G0104 pays in Oxnard, CA?

Tell us what you were actually trying to work out. We’ll answer you directly, or build the page that does.

Fee sheets · Coming soon

Put G0104 and the rest of your codes on one sheet

Your codes at your locality, with payer contracts beside Medicare.

Join the waitlist