CPT code 46604: Anoscopy, with dilation2026 Medicare rate & RVUs in South Dakota
Report this service when the clinician examines the anal canal with an anoscope and dilates a narrowed area during the procedure.
In South Dakota, Medicare pays $687.07 for 46604 in the office and $58.47 when it’s performed in a hospital or facility.
Check a contract rate as a % of Medicare · 46604 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 46604 covers
A clinician advances an anoscope to inspect the anal canal and dilates a narrowed segment under direct visualization. Dilation may use a balloon, guidewire, or bougie. A typical indication is anal canal narrowing that makes passage difficult or limits examination. Colorectal surgeons and other clinicians who perform anorectal procedures may provide the service in an office or outpatient facility.
Report this code when the documented service includes both anoscopic examination and dilation; a diagnostic examination without dilation is a different service. The note should identify the narrowing and document the dilation performed and its method. Medicare assigns a 0-day global period, so same-day preoperative and postoperative care is included. When related endoscopies are performed together, endoscopy family pricing applies. Do not use modifier 50. Medicare does not pay an assistant-at-surgery claim for this service, and co-surgeon and team-surgery billing 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 South Dakota compares for 46604
Across 109 of 109 payment localities, the office rate for 46604 runs from $596.27 in Arkansas to $979.98 in San Benito County, CA. South Dakota pays $687.07. The RVUs are the same everywhere; the geographic indexes change the dollars.
- South Dakota · this page$687.07
- Los Angeles, CA · California$809.67+$122.60
- Washington, DC area · District of Columbia$809.54+$122.47
- Miami, FL · Florida$726.97+$39.90
- Chicago, IL · Illinois$702.34+$15.27
- Manhattan, NY · New York$802.29+$115.22
- Alaska · Alaska$747.42+$60.35
Other areas in South Dakota first, then benchmark localities. Bars start at $0.
Every other payment area
| Payment locality | Office | Facility |
|---|---|---|
| AlabamaAlabama | $607.00 | $56.97 |
| ArkansasArkansas | $596.27 | $56.29 |
| ArizonaArizona | $670.00 | $60.88 |
| Bakersfield, CACalifornia | $751.91 | $62.96 |
| Chico, CACalifornia | $751.40 | $62.45 |
| El Centro, CACalifornia | $751.43 | $62.48 |
| Fresno, CACalifornia | $751.40 | $62.45 |
| Hanford, CACalifornia | $751.40 | $62.45 |
| Madera, CACalifornia | $751.40 | $62.45 |
| Merced, CACalifornia | $751.40 | $62.45 |
| Modesto, CACalifornia | $751.40 | $62.45 |
| Napa, CACalifornia | $897.44 | $68.93 |
| Oxnard, CACalifornia | $808.33 | $65.32 |
| Redding, CACalifornia | $751.40 | $62.45 |
| Rest of CaliforniaCalifornia | $751.40 | $62.45 |
| Riverside, CACalifornia | $753.34 | $64.39 |
| Sacramento, CACalifornia | $795.70 | $64.63 |
| Salinas, CACalifornia | $792.92 | $64.37 |
| San Diego, CACalifornia | $817.04 | $65.23 |
| Marin County, CACalifornia | $958.16 | $71.83 |
| San Francisco, CACalifornia | $957.96 | $71.62 |
| San Benito County, CACalifornia | $979.98 | $73.53 |
| Santa Clara County, CACalifornia | $979.14 | $72.70 |
| San Luis Obispo, CACalifornia | $779.42 | $63.44 |
| Santa Cruz, CACalifornia | $829.08 | $65.33 |
| Santa Maria, CACalifornia | $797.38 | $64.43 |
| Santa Rosa, CACalifornia | $837.85 | $65.93 |
| Stockton, CACalifornia | $751.40 | $62.45 |
| Vallejo, CACalifornia | $897.14 | $68.64 |
| Visalia, CACalifornia | $751.40 | $62.45 |
| Yuba City, CACalifornia | $751.40 | $62.45 |
| ColoradoColorado | $731.85 | $63.02 |
| ConnecticutConnecticut | $743.17 | $66.16 |
| DelawareDelaware | $682.80 | $61.74 |
| Fort Lauderdale, FLFlorida | $704.39 | $67.62 |
| Rest of FloridaFlorida | $665.42 | $64.47 |
| Atlanta, GAGeorgia | $702.80 | $64.14 |
| Rest of GeorgiaGeorgia | $621.84 | $61.12 |
| Hawaii, Guam, HIHawaii | $777.81 | $63.09 |
| IowaIowa | $632.05 | $56.88 |
| IdahoIdaho | $635.76 | $57.45 |
| East St. Louis, ILIllinois | $645.03 | $66.71 |
| Rest of IllinoisIllinois | $637.76 | $63.84 |
| Suburban Chicago, ILIllinois | $713.53 | $67.96 |
| IndianaIndiana | $640.40 | $57.69 |
| KansasKansas | $625.52 | $57.27 |
| KentuckyKentucky | $618.22 | $59.39 |
| New Orleans, LALouisiana | $653.43 | $61.92 |
| Rest of LouisianaLouisiana | $615.87 | $59.56 |
| Metropolitan Boston, MAMassachusetts | $818.19 | $67.64 |
| Rest of MassachusettsMassachusetts | $724.92 | $63.00 |
| Baltimore area, MDMaryland | $740.59 | $66.10 |
| Rest of MarylandMaryland | $698.73 | $62.58 |
| Rest of MaineMaine | $636.66 | $58.34 |
| Southern Maine, MEMaine | $682.98 | $60.03 |
| Detroit, MIMichigan | $672.38 | $65.78 |
| Rest of MichiganMichigan | $635.15 | $61.23 |
| MinnesotaMinnesota | $705.73 | $58.90 |
| Metropolitan Kansas City, MOMissouri | $651.18 | $60.92 |
| Metropolitan St. Louis, MOMissouri | $659.80 | $61.37 |
| Rest of MissouriMissouri | $600.98 | $59.12 |
| MississippiMississippi | $598.92 | $57.69 |
| MontanaMontana | $691.05 | $62.45 |
| North CarolinaNorth Carolina | $645.23 | $58.75 |
| North DakotaNorth Dakota | $687.49 | $58.89 |
| NebraskaNebraska | $637.15 | $56.95 |
| New HampshireNew Hampshire | $717.03 | $62.65 |
| Northern New JerseyNew Jersey | $797.84 | $68.66 |
| Rest of New JerseyNew Jersey | $752.94 | $66.50 |
| New MexicoNew Mexico | $638.19 | $61.76 |
| NevadaNevada | $690.71 | $61.48 |
| NYC suburbs and Long Island, NYNew York | $821.52 | $74.11 |
| Poughkeepsie and northern NYC suburbs, NYNew York | $755.74 | $67.41 |
| Queens, NYNew York | $814.46 | $71.45 |
| Rest of New YorkNew York | $656.70 | $59.52 |
| OhioOhio | $634.42 | $60.50 |
| OklahomaOklahoma | $620.00 | $58.65 |
| Portland, OROregon | $762.39 | $64.01 |
| Rest of OregonOregon | $686.67 | $60.58 |
| Metropolitan Philadelphia, PAPennsylvania | $719.54 | $65.17 |
| Rest of PennsylvaniaPennsylvania | $637.30 | $60.24 |
| Puerto RicoPuerto Rico | $698.14 | $62.62 |
| Rhode IslandRhode Island | $712.55 | $63.21 |
| South CarolinaSouth Carolina | $640.64 | $59.81 |
| TennesseeTennessee | $628.98 | $57.58 |
| Austin, TXTexas | $728.24 | $63.18 |
| Beaumont, TXTexas | $631.99 | $59.96 |
| Brazoria, TXTexas | $684.14 | $61.20 |
| Dallas, TXTexas | $687.90 | $61.81 |
| Fort Worth, TXTexas | $681.47 | $61.66 |
| Galveston, TXTexas | $685.74 | $61.53 |
| Houston, TXTexas | $689.03 | $64.83 |
| Rest of TexasTexas | $657.25 | $60.70 |
| UtahUtah | $651.35 | $60.46 |
| VirginiaVirginia | $678.22 | $60.30 |
| Virgin Islands, VIUnited States Virgin Islands | $698.14 | $62.62 |
| VermontVermont | $681.58 | $59.26 |
| Rest of WashingtonWashington | $724.60 | $62.68 |
| King County, WAWashington | $839.56 | $68.26 |
| WisconsinWisconsin | $659.53 | $57.33 |
| West VirginiaWest Virginia | $608.29 | $62.03 |
| WyomingWyoming | $689.50 | $60.90 |
46604 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.
$596.27
$865.69
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 | $747.42 | 1 |
| AL | $607.00 | 1 |
| AR | $596.27 | 1 |
| AZ | $670.00 | 1 |
| CA | $751.40–$979.98 | 29 |
| CO | $731.85 | 1 |
| CT | $743.17 | 1 |
| DC | $809.54 | 1 |
| DE | $682.80 | 1 |
| FL | $665.42–$726.97 | 3 |
| GA | $621.84–$702.80 | 2 |
| GU | $777.81 | 1 |
| HI | $777.81 | 1 |
| IA | $632.05 | 1 |
| ID | $635.76 | 1 |
| IL | $637.76–$713.53 | 4 |
| IN | $640.40 | 1 |
| KS | $625.52 | 1 |
| KY | $618.22 | 1 |
| LA | $615.87–$653.43 | 2 |
| MA | $724.92–$818.19 | 2 |
| MD | $698.73–$809.54 | 3 |
| ME | $636.66–$682.98 | 2 |
| MI | $635.15–$672.38 | 2 |
| MN | $705.73 | 1 |
| MO | $600.98–$659.80 | 3 |
| MS | $598.92 | 1 |
| MT | $691.05 | 1 |
| NC | $645.23 | 1 |
| ND | $687.49 | 1 |
| NE | $637.15 | 1 |
| NH | $717.03 | 1 |
| NJ | $752.94–$797.84 | 2 |
| NM | $638.19 | 1 |
| NV | $690.71 | 1 |
| NY | $656.70–$821.52 | 5 |
| OH | $634.42 | 1 |
| OK | $620.00 | 1 |
| OR | $686.67–$762.39 | 2 |
| PA | $637.30–$719.54 | 2 |
| PR | $698.14 | 1 |
| RI | $712.55 | 1 |
| SC | $640.64 | 1 |
| SD | $687.07 | 1 |
| TN | $628.98 | 1 |
| TX | $631.99–$728.24 | 8 |
| UT | $651.35 | 1 |
| VA | $678.22–$809.54 | 2 |
| VI | $698.14 | 1 |
| VT | $681.58 | 1 |
| WA | $724.60–$839.56 | 2 |
| WI | $659.53 | 1 |
| WV | $608.29 | 1 |
| WY | $689.50 | 1 |
How the 46604 rate is calculated
Each of 46604’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 · 46604
RVUs × geographic indexes × conversion factor
Work1.00
1.00 RVUs× 1.000 GPCI
Practice expense19.51
19.51 RVUs× 1.000 GPCI
Malpractice0.18
0.18 RVUs× 1.000 GPCI
Adjusted RVUs
20.6900
Conversion factor
$33.4009
Medicare rate
$691.06
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
The exact South Dakota inputs and CMS source lines
PPRRVU2026_Oct_nonQPP.csv
5,600
- Code
- 46604
- Physician work
- 1.00
- Practice expense
- 19.51
- Malpractice
- 0.18
GPCI2026.csv
94
- Locality
- South Dakota
- Physician work
- 1.000
- Practice expense
- 1.000
- Malpractice
- 0.336
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 1.00 | × 1.000 | 1.0000 |
| Practice expense | 19.51 | × 1.000 | 19.5100 |
| Malpractice | 0.18 | × 0.336 | 0.0605 |
| Total RVUs | 20.5705 | ||
| Conversion factor | × 33.4009 | ||
Office rate, South Dakota$687.07
Office: (1 × 1 + 19.51 × 1 + 0.18 × 0.336) × $33.4009 = $687.07
Facility: (1 × 1 + 0.69 × 1 + 0.18 × 0.336) × $33.4009 = $58.47
Payment rules and modifiers for 46604
The CMS indicators that decide how 46604 is paid alongside other services.
CMS payment indicators · 46604
Anoscopy, with 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 | 3 | Endoscopy family rules apply. |
| 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
46604 without 51 · national office
$691.06
Anoscopy, with dilation
46604-51 · Second procedure: 50%
$345.53
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 46604 has changed in South Dakota
46604 · Office / nonfacility
$687.07
Effective 2026-10-01
The base rate is $98.00 higher than on 2025-10-01, moving from $589.07 to $687.07 (16.6%).
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
$589.07changed to$687.07
- Conversion factor 32.3465 changed to 33.4009
- Work RVU 1.03 changed to 1.00
- Practice expense RVU 17.12 changed to 19.51
- Malpractice RVU 0.16 changed to 0.18
- Malpractice GPCI 0.382 changed to 0.336
Held through RVU26B, RVU26C, RVU26D.
January 1, 2025
RVU25A
$635.75changed to$589.07
- Conversion factor 33.2875 changed to 32.3465
- Practice expense RVU 18.00 changed to 17.12
- Malpractice RVU 0.18 changed to 0.16
Held through RVU25B, RVU25C, RVU25D.
March 9, 2024
RVU24AR
$625.37changed to$635.75
- Conversion factor 32.7442 changed to 33.2875
Held through RVU24B, RVU24C, RVU24D.
January 1, 2024
RVU24A
$667.09changed to$625.37
- Conversion factor 33.8872 changed to 32.7442
- Practice expense RVU 18.59 changed to 18.00
- Malpractice GPCI 0.364 changed to 0.382
January 1, 2023
RVU23A
$720.36changed to$667.09
- Conversion factor 34.6062 changed to 33.8872
- Practice expense RVU 19.72 changed to 18.59
- Malpractice RVU 0.19 changed to 0.18
- Malpractice GPCI 0.347 changed to 0.364
Held through RVU23B, RVU23C, RVU23D.
January 1, 2022
RVU22A
$734.34changed to$720.36
- Conversion factor 34.8931 changed to 34.6062
- Practice expense RVU 19.96 changed to 19.72
- Malpractice RVU 0.16 changed to 0.19
Held through RVU22B, RVU22C, RVU22D.
January 1, 2021
RVU21A
$681.92changed to$734.34
- Conversion factor 36.0896 changed to 34.8931
- Practice expense RVU 17.81 changed to 19.96
- Malpractice RVU 0.15 changed to 0.16
- Malpractice GPCI 0.368 changed to 0.347
Held through RVU21B, RVU21C, RVU21D.
January 1, 2020
RVU20A
$655.99changed to$681.92
- Conversion factor 36.0391 changed to 36.0896
- Practice expense RVU 17.11 changed to 17.81
- Malpractice RVU 0.16 changed to 0.15
- Malpractice GPCI 0.389 changed to 0.368
Held through RVU20B, RVU20C, RVU20D.
January 1, 2019
RVU19A
$639.07changed to$655.99
- Conversion factor 35.9996 changed to 36.0391
- Practice expense RVU 16.66 changed to 17.11
Held through RVU19B, RVU19C, RVU19D.
January 1, 2018
RVU18AR1
$630.10changed to$639.07
- Conversion factor 35.8887 changed to 35.9996
- Practice expense RVU 16.46 changed to 16.66
- Malpractice RVU 0.17 changed to 0.16
- Malpractice GPCI 0.395 changed to 0.389
Held through RVU18B, RVU18C, RVU18D.
January 1, 2017
RVU17A
$625.79changed to$630.10
- Conversion factor 35.8043 changed to 35.8887
- Practice expense RVU 16.38 changed to 16.46
- Malpractice GPCI 0.400 changed to 0.395
Held through RVU17B, RVU17C, RVU17D.
January 1, 2016
RVU16A
$638.32changed to$625.79
- Conversion factor 35.9335 changed to 35.8043
- Practice expense RVU 16.67 changed to 16.38
- Malpractice RVU 0.16 changed to 0.17
Held through RVU16B, RVU16C, RVU16D.
July 1, 2015
RVU15C
$635.15changed to$638.32
- Conversion factor 35.7547 changed to 35.9335
Held through RVU15D.
January 1, 2015
RVU15A
$624.48changed to$635.15
- Conversion factor 35.8228 changed to 35.7547
- Practice expense RVU 16.34 changed to 16.67
- Malpractice RVU 0.15 changed to 0.16
- Malpractice GPCI 0.416 changed to 0.400
Held through RVU15B.
January 1, 2014
RVU14A
$665.80changed to$624.48
- Conversion factor 34.0230 changed to 35.8228
- Practice expense RVU 18.47 changed to 16.34
- Malpractice RVU 0.16 changed to 0.15
- Malpractice GPCI 0.432 changed to 0.416
Held through RVU14B, RVU14C, RVU14D.
January 1, 2013
RVU13AR
Earliest loaded release: $665.80
Held through RVU13B, RVU13C, RVU13D.
| Effective from | Office | Facility | CMS release |
|---|---|---|---|
| 2026-10-01 | $687.07 | $58.47 | RVU26D |
| 2026-07-01 | $687.07 | $58.47 | RVU26C |
| 2026-04-01 | $687.07 | $58.47 | RVU26B |
| 2026-01-01 | $687.07 | $58.47 | RVU26A |
| 2025-10-01 | $589.07 | $60.85 | RVU25D |
| 2025-07-01 | $589.07 | $60.85 | RVU25C |
| 2025-04-01 | $589.07 | $60.85 | RVU25B |
| 2025-01-01 | $589.07 | $60.85 | RVU25A |
| 2024-10-01 | $635.75 | $62.21 | RVU24D |
| 2024-07-01 | $635.75 | $62.21 | RVU24C |
| 2024-04-01 | $635.75 | $62.21 | RVU24B |
| 2024-03-09 | $635.75 | $62.21 | RVU24AR |
| 2024-01-01 | $625.37 | $61.19 | RVU24A |
| 2023-10-01 | $667.09 | $62.54 | RVU23D |
| 2023-07-01 | $667.09 | $62.54 | RVU23C |
| 2023-04-01 | $667.09 | $62.54 | RVU23B |
| 2023-01-01 | $667.09 | $62.54 | RVU23A |
| 2022-10-01 | $720.36 | $63.53 | RVU22D |
| 2022-07-01 | $720.36 | $63.53 | RVU22C |
| 2022-04-01 | $720.36 | $63.53 | RVU22B |
| 2022-01-01 | $720.36 | $63.53 | RVU22A |
| 2021-10-01 | $734.34 | $63.00 | RVU21D |
| 2021-07-01 | $734.34 | $63.00 | RVU21C |
| 2021-04-01 | $734.34 | $63.00 | RVU21B |
| 2021-01-01 | $734.34 | $63.00 | RVU21A |
| 2020-10-01 | $681.92 | $64.79 | RVU20D |
| 2020-07-01 | $681.92 | $64.79 | RVU20C |
| 2020-04-01 | $681.92 | $64.79 | RVU20B |
| 2020-01-01 | $681.92 | $64.79 | RVU20A |
| 2019-10-01 | $655.99 | $64.95 | RVU19D |
| 2019-07-01 | $655.99 | $64.95 | RVU19C |
| 2019-04-01 | $655.99 | $64.95 | RVU19B |
| 2019-01-01 | $655.99 | $64.95 | RVU19A |
| 2018-10-01 | $639.07 | $65.60 | RVU18D |
| 2018-07-01 | $639.07 | $65.60 | RVU18C |
| 2018-04-01 | $639.07 | $65.60 | RVU18B |
| 2018-01-01 | $639.07 | $65.60 | RVU18AR1 |
| 2017-10-01 | $630.10 | $65.57 | RVU17D |
| 2017-07-01 | $630.10 | $65.57 | RVU17C |
| 2017-04-01 | $630.10 | $65.57 | RVU17B |
| 2017-01-01 | $630.10 | $65.57 | RVU17A |
| 2016-10-01 | $625.79 | $65.09 | RVU16D |
| 2016-07-01 | $625.79 | $65.09 | RVU16C |
| 2016-04-01 | $625.79 | $65.09 | RVU16B |
| 2016-01-01 | $625.79 | $65.09 | RVU16A |
| 2015-10-01 | $638.32 | $65.54 | RVU15D |
| 2015-07-01 | $638.32 | $65.54 | RVU15C |
| 2015-04-01 | $635.15 | $65.22 | RVU15B |
| 2015-01-01 | $635.15 | $65.22 | RVU15A |
| 2014-10-01 | $624.48 | $65.28 | RVU14D |
| 2014-07-01 | $624.48 | $65.28 | RVU14C |
| 2014-04-01 | $624.48 | $65.28 | RVU14B |
| 2014-01-01 | $624.48 | $65.28 | RVU14A |
| 2013-10-01 | $665.80 | $64.61 | RVU13D |
| 2013-07-01 | $665.80 | $64.61 | RVU13C |
| 2013-04-01 | $665.80 | $64.61 | RVU13B |
| 2013-01-01 | $665.80 | $64.61 | RVU13AR |
Where the South Dakota rate applies
South Dakota is a Medicare payment area, not a city. Our Census mapping connects it to 485 cities and communities in South Dakota. Some span more than one payment area; confirm with the service ZIP.
- Aberdeen
- Agar
- Agency Village
- Akaska
- Albee
- Alcester
- Alexandria
- Allen
46604 billing questions
When should I report this instead of diagnostic anoscopy?
Report this code when the clinician performs dilation of a narrowed anal canal during anoscopy. A diagnostic examination without dilation points to 46600.
Can I report a biopsy separately when dilation is performed?
This code represents anoscopy with dilation, not biopsy. If the clinician also takes a biopsy, document the additional work and apply the applicable coding and endoscopy family pricing rules.
Should I append modifier 50?
No. Medicare's bilateral adjustment does not apply, and modifier 50 is inappropriate for this code.
Is same-day evaluation and management work included?
The code has a 0-day global period, which includes same-day preoperative and postoperative care.
Can an assistant or co-surgeon be billed?
Medicare does not pay an assistant-at-surgery claim for this service. Co-surgeon and team-surgery billing are not permitted.
What documentation supports reporting dilation?
Document the anal canal narrowing and the dilation actually performed, including the method used. An anoscopic examination alone does not support this code.
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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