No office rate
Choose 23100 for arthrotomy involving the glenohumeral joint, not the AC or SC joint.
On this page
CMS RVU26D · Effective 2026-10-01
23101 in Chico
Office / nonfacility
Not available in this setting
Base rate per service
Facility setting
$448.98
Base rate per service
Amounts below use the non-QP conversion factor for participating physicians. These are base physician payments before claim-level adjustments, not patient costs or total hospital charges.
Orthopedic surgery
About 23101: Acromioclavicular or sternoclavicular arthrotomy
Open AC or SC joint surgery that includes biopsy, reported when the surgeon opens one of these joints for direct access or tissue sampling.
The surgeon opens the acromioclavicular (AC) or sternoclavicular (SC) joint through an incision to access the joint directly; biopsy is included when performed. Orthopedic surgeons commonly perform this procedure in a hospital or ambulatory surgery center when direct examination or tissue sampling is needed, such as evaluating a suspected joint infection or inflammatory process.
Select the code based on the joint and the documented open procedure, not simply the diagnosis. The operative report should identify the AC or SC joint, side, surgical approach, and whether tissue was sampled. The day-before preoperative visit and 90 days of related postoperative care are included in the global period. For multiple procedures in the same session, the highest-valued procedure is paid in full and others at 50%. Bilateral reporting with modifier 50 is paid at 150%. Assistant-at-surgery services are not paid; co-surgeons require supporting documentation, and team surgery is not permitted.
CMS billing rules for 23101
- Global period
- Major surgery with a 90-day global period: the day-before preoperative visit and 90 days of related postoperative care are included.
- Multiple procedures
- Standard multiple procedure reduction: the highest-valued procedure is paid in full and others at 50% when performed in the same session.
- Bilateral procedures
- Bilateral procedure with modifier 50 is paid at 150%.
- Assistant at surgery
- Statutory restriction: assistant at surgery is not paid.
- Co-surgeons
- Co-surgeons paid only with supporting documentation.
- Team surgery
- Team surgery not permitted.
Where the value comes from
- Work RVU5.58 · 42%
- Practice expense (office) RVU6.50 · 49%
- Malpractice RVU1.20 · 9%
49
Medicare services in 2024 · #5362 by national volume
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.
23101 compared with similar codes
Office rates for Chico, from the same CMS release.
No office rate
23106 applies to sternoclavicular arthrotomy with synovectomy; 23101 covers AC or SC arthrotomy that includes biopsy.
No office rate
23120 is partial clavicle resection. It represents bone removal, not opening the AC or SC joint for access or biopsy.
The same code, a different location
How does Chico compare?
23101 across payment areas
Same release and payment basis · bars start at $0
Chico · This locality
Unavailable
Unavailable
No comparable rate is available in this setting.
Unavailable
No comparable rate is available in this setting.
Unavailable
No comparable rate is available in this setting.
Unavailable
No comparable rate is available in this setting.
No comparable rate is available in this setting.
Unavailable
No comparable rate is available in this setting.
Other payment areas listed in California appear first, followed by selected cross-country examples. The chart compares amounts, not distance.
The code’s RVUs stay the same in these comparisons. Geographic adjustments to work, practice expense and malpractice change the dollar amount. A city name alone may not identify the payment area for a service address.
Compare all 108 other payment areas
Merced
California · 23101
Office
Unavailable
Facility
$448.98
No comparable office rate is available.
Modesto
California · 23101
Office
Unavailable
Facility
$448.98
No comparable office rate is available.
Napa
California · 23101
Office
Unavailable
Facility
$504.63
No comparable office rate is available.
Oxnard-Thousand Oaks-Ventura
California · 23101
Office
Unavailable
Facility
$473.19
No comparable office rate is available.
Redding
California · 23101
Office
Unavailable
Facility
$448.98
No comparable office rate is available.
Rest Of California
California · 23101
Office
Unavailable
Facility
$448.98
No comparable office rate is available.
Riverside-San Bernardino-Ontario
California · 23101
Office
Unavailable
Facility
$461.87
No comparable office rate is available.
Sacramento-Roseville-Folsom
California · 23101
Office
Unavailable
Facility
$467.06
No comparable office rate is available.
Salinas
California · 23101
Office
Unavailable
Facility
$465.26
No comparable office rate is available.
San Diego-Chula Vista-Carlsbad
California · 23101
Office
Unavailable
Facility
$473.35
No comparable office rate is available.
San Francisco-Oakland-Berkeley (Marin Cnty)
California · 23101
Office
Unavailable
Facility
$528.60
No comparable office rate is available.
San Francisco-Oakland-Berkeley (San Francisco/San Mateo/Alameda/Contra Costa Cnty)
California · 23101
Office
Unavailable
Facility
$527.24
No comparable office rate is available.
San Jose-Sunnyvale-Santa Clara (San Benito Cnty)
California · 23101
Office
Unavailable
Facility
$541.43
No comparable office rate is available.
San Jose-Sunnyvale-Santa Clara (Santa Clara Cnty)
California · 23101
Office
Unavailable
Facility
$535.86
No comparable office rate is available.
San Luis Obispo-Paso Robles
California · 23101
Office
Unavailable
Facility
$458.31
No comparable office rate is available.
Santa Cruz-Watsonville
California · 23101
Office
Unavailable
Facility
$475.56
No comparable office rate is available.
Santa Maria-Santa Barbara
California · 23101
Office
Unavailable
Facility
$466.22
No comparable office rate is available.
Santa Rosa-Petaluma
California · 23101
Office
Unavailable
Facility
$480.06
No comparable office rate is available.
Stockton
California · 23101
Office
Unavailable
Facility
$448.98
No comparable office rate is available.
Vallejo
California · 23101
Office
Unavailable
Facility
$502.66
No comparable office rate is available.
Visalia
California · 23101
Office
Unavailable
Facility
$448.98
No comparable office rate is available.
Yuba City
California · 23101
Office
Unavailable
Facility
$448.98
No comparable office rate is available.
Dc + Md/Va Suburbs
District of Columbia · 23101
Office
Unavailable
Facility
$496.80
No comparable office rate is available.
Miami
Florida · 23101
Office
Unavailable
Facility
$513.75
No comparable office rate is available.
Chicago
Illinois · 23101
Office
Unavailable
Facility
$497.86
No comparable office rate is available.
Manhattan
New York · 23101
Office
Unavailable
Facility
$514.15
No comparable office rate is available.
Alaska*
Alaska · 23101
Office
Unavailable
Facility
$532.87
No comparable office rate is available.
Alabama
Alabama · 23101
Office
Unavailable
Facility
$399.03
No comparable office rate is available.
Arkansas
Arkansas · 23101
Office
Unavailable
Facility
$393.51
No comparable office rate is available.
Arizona
Arizona · 23101
Office
Unavailable
Facility
$431.06
No comparable office rate is available.
Colorado
Colorado · 23101
Office
Unavailable
Facility
$450.92
No comparable office rate is available.
Connecticut
Connecticut · 23101
Office
Unavailable
Facility
$472.43
No comparable office rate is available.
Delaware
Delaware · 23101
Office
Unavailable
Facility
$437.84
No comparable office rate is available.
Fort Lauderdale
Florida · 23101
Office
Unavailable
Facility
$478.77
No comparable office rate is available.
Rest Of Florida
Florida · 23101
Office
Unavailable
Facility
$454.17
No comparable office rate is available.
Atlanta
Georgia · 23101
Office
Unavailable
Facility
$455.65
No comparable office rate is available.
Rest Of Georgia
Georgia · 23101
Office
Unavailable
Facility
$427.81
No comparable office rate is available.
Hawaii, Guam
Hawaii · 23101
Office
Unavailable
Facility
$456.43
No comparable office rate is available.
Iowa
Iowa · 23101
Office
Unavailable
Facility
$400.94
No comparable office rate is available.
Idaho
Idaho · 23101
Office
Unavailable
Facility
$405.07
No comparable office rate is available.
East St. Louis
Illinois · 23101
Office
Unavailable
Facility
$466.84
No comparable office rate is available.
Rest Of Illinois
Illinois · 23101
Office
Unavailable
Facility
$447.24
No comparable office rate is available.
Suburban Chicago
Illinois · 23101
Office
Unavailable
Facility
$481.67
No comparable office rate is available.
Indiana
Indiana · 23101
Office
Unavailable
Facility
$407.11
No comparable office rate is available.
Kansas
Kansas · 23101
Office
Unavailable
Facility
$402.84
No comparable office rate is available.
Kentucky
Kentucky · 23101
Office
Unavailable
Facility
$416.06
No comparable office rate is available.
New Orleans
Louisiana · 23101
Office
Unavailable
Facility
$436.21
No comparable office rate is available.
Rest Of Louisiana
Louisiana · 23101
Office
Unavailable
Facility
$416.91
No comparable office rate is available.
Metropolitan Boston
Massachusetts · 23101
Office
Unavailable
Facility
$488.92
No comparable office rate is available.
Rest Of Massachusetts
Massachusetts · 23101
Office
Unavailable
Facility
$449.92
No comparable office rate is available.
Baltimore/Surr. Cntys
Maryland · 23101
Office
Unavailable
Facility
$471.89
No comparable office rate is available.
Rest Of Maryland
Maryland · 23101
Office
Unavailable
Facility
$444.75
No comparable office rate is available.
Rest Of Maine
Maine · 23101
Office
Unavailable
Facility
$411.04
No comparable office rate is available.
Southern Maine
Maine · 23101
Office
Unavailable
Facility
$426.82
No comparable office rate is available.
Detroit
Michigan · 23101
Office
Unavailable
Facility
$463.46
No comparable office rate is available.
Rest Of Michigan
Michigan · 23101
Office
Unavailable
Facility
$429.85
No comparable office rate is available.
Minnesota
Minnesota · 23101
Office
Unavailable
Facility
$421.64
No comparable office rate is available.
Metropolitan Kansas City
Missouri · 23101
Office
Unavailable
Facility
$429.40
No comparable office rate is available.
Metropolitan St. Louis
Missouri · 23101
Office
Unavailable
Facility
$433.22
No comparable office rate is available.
Rest Of Missouri
Missouri · 23101
Office
Unavailable
Facility
$412.56
No comparable office rate is available.
Mississippi
Mississippi · 23101
Office
Unavailable
Facility
$402.93
No comparable office rate is available.
Montana**
Montana · 23101
Office
Unavailable
Facility
$443.48
No comparable office rate is available.
North Carolina
North Carolina · 23101
Office
Unavailable
Facility
$414.55
No comparable office rate is available.
North Dakota**
North Dakota · 23101
Office
Unavailable
Facility
$419.76
No comparable office rate is available.
Nebraska
Nebraska · 23101
Office
Unavailable
Facility
$401.92
No comparable office rate is available.
New Hampshire
New Hampshire · 23101
Office
Unavailable
Facility
$447.46
No comparable office rate is available.
Northern Nj
New Jersey · 23101
Office
Unavailable
Facility
$492.77
No comparable office rate is available.
Rest Of New Jersey
New Jersey · 23101
Office
Unavailable
Facility
$474.88
No comparable office rate is available.
New Mexico
New Mexico · 23101
Office
Unavailable
Facility
$433.60
No comparable office rate is available.
Nevada**
Nevada · 23101
Office
Unavailable
Facility
$437.09
No comparable office rate is available.
Nyc Suburbs/Long Island
New York · 23101
Office
Unavailable
Facility
$530.87
No comparable office rate is available.
Poughkpsie/N Nyc Suburbs
New York · 23101
Office
Unavailable
Facility
$480.99
No comparable office rate is available.
Queens
New York · 23101
Office
Unavailable
Facility
$512.72
No comparable office rate is available.
Rest Of New York
New York · 23101
Office
Unavailable
Facility
$420.80
No comparable office rate is available.
Ohio
Ohio · 23101
Office
Unavailable
Facility
$425.00
No comparable office rate is available.
Oklahoma
Oklahoma · 23101
Office
Unavailable
Facility
$411.40
No comparable office rate is available.
Portland
Oregon · 23101
Office
Unavailable
Facility
$460.38
No comparable office rate is available.
Rest Of Oregon
Oregon · 23101
Office
Unavailable
Facility
$430.79
No comparable office rate is available.
Metropolitan Philadelphia
Pennsylvania · 23101
Office
Unavailable
Facility
$463.56
No comparable office rate is available.
Rest Of Pennsylvania
Pennsylvania · 23101
Office
Unavailable
Facility
$423.56
No comparable office rate is available.
Puerto Rico
Puerto Rico · 23101
Office
Unavailable
Facility
$445.35
No comparable office rate is available.
Rhode Island
Rhode Island · 23101
Office
Unavailable
Facility
$449.94
No comparable office rate is available.
South Carolina
South Carolina · 23101
Office
Unavailable
Facility
$421.05
No comparable office rate is available.
South Dakota**
South Dakota · 23101
Office
Unavailable
Facility
$416.95
No comparable office rate is available.
Tennessee
Tennessee · 23101
Office
Unavailable
Facility
$405.25
No comparable office rate is available.
Austin
Texas · 23101
Office
Unavailable
Facility
$451.96
No comparable office rate is available.
Beaumont
Texas · 23101
Office
Unavailable
Facility
$421.18
No comparable office rate is available.
Brazoria
Texas · 23101
Office
Unavailable
Facility
$434.28
No comparable office rate is available.
Dallas
Texas · 23101
Office
Unavailable
Facility
$438.68
No comparable office rate is available.
Fort Worth
Texas · 23101
Office
Unavailable
Facility
$437.03
No comparable office rate is available.
Galveston
Texas · 23101
Office
Unavailable
Facility
$436.64
No comparable office rate is available.
Houston
Texas · 23101
Office
Unavailable
Facility
$458.61
No comparable office rate is available.
Rest Of Texas
Texas · 23101
Office
Unavailable
Facility
$428.60
No comparable office rate is available.
Utah
Utah · 23101
Office
Unavailable
Facility
$426.45
No comparable office rate is available.
Virginia
Virginia · 23101
Office
Unavailable
Facility
$428.09
No comparable office rate is available.
Virgin Islands
United States Virgin Islands · 23101
Office
Unavailable
Facility
$445.35
No comparable office rate is available.
Vermont
Vermont · 23101
Office
Unavailable
Facility
$421.59
No comparable office rate is available.
Rest Of Washington
Washington · 23101
Office
Unavailable
Facility
$447.91
No comparable office rate is available.
Seattle (King Cnty)
Washington · 23101
Office
Unavailable
Facility
$494.83
No comparable office rate is available.
Wisconsin
Wisconsin · 23101
Office
Unavailable
Facility
$406.71
No comparable office rate is available.
West Virginia
West Virginia · 23101
Office
Unavailable
Facility
$432.40
No comparable office rate is available.
Wyoming**
Wyoming · 23101
Office
Unavailable
Facility
$433.14
No comparable office rate is available.
See how rates vary across the country
23101 · Office / nonfacility · Non-QP. Choose a state to explore its payment localities. A range means the amount varies within that state.
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.
View all state and territory rates as a table
| State / territory | Rate range | Localities |
|---|---|---|
| AK | No published base rate | 1 |
| AL | No published base rate | 1 |
| AR | No published base rate | 1 |
| AZ | No published base rate | 1 |
| CA | No published base rate | 29 |
| CO | No published base rate | 1 |
| CT | No published base rate | 1 |
| DC | No published base rate | 1 |
| DE | No published base rate | 1 |
| FL | No published base rate | 3 |
| GA | No published base rate | 2 |
| GU | No published base rate | 1 |
| HI | No published base rate | 1 |
| IA | No published base rate | 1 |
| ID | No published base rate | 1 |
| IL | No published base rate | 4 |
| IN | No published base rate | 1 |
| KS | No published base rate | 1 |
| KY | No published base rate | 1 |
| LA | No published base rate | 2 |
| MA | No published base rate | 2 |
| MD | No published base rate | 3 |
| ME | No published base rate | 2 |
| MI | No published base rate | 2 |
| MN | No published base rate | 1 |
| MO | No published base rate | 3 |
| MS | No published base rate | 1 |
| MT | No published base rate | 1 |
| NC | No published base rate | 1 |
| ND | No published base rate | 1 |
| NE | No published base rate | 1 |
| NH | No published base rate | 1 |
| NJ | No published base rate | 2 |
| NM | No published base rate | 1 |
| NV | No published base rate | 1 |
| NY | No published base rate | 5 |
| OH | No published base rate | 1 |
| OK | No published base rate | 1 |
| OR | No published base rate | 2 |
| PA | No published base rate | 2 |
| PR | No published base rate | 1 |
| RI | No published base rate | 1 |
| SC | No published base rate | 1 |
| SD | No published base rate | 1 |
| TN | No published base rate | 1 |
| TX | No published base rate | 8 |
| UT | No published base rate | 1 |
| VA | No published base rate | 2 |
| VI | No published base rate | 1 |
| VT | No published base rate | 1 |
| WA | No published base rate | 2 |
| WI | No published base rate | 1 |
| WV | No published base rate | 1 |
| WY | No published base rate | 1 |
Where does this rate apply?
Chico is a Medicare payment area. Our Census mapping connects it to 30 cities and communities in California, including the examples shown here.
Some communities span more than one payment area. Follow a city link to compare all of its mapped areas, or check the service-location ZIP above for an address-level starting point.
Use this rate
What is a percentage of Medicare worth?
Turn a percentage into dollars for 23101 in Chico. This uses the base rate on this page, so the locality and release stay consistent.
Reference amount per service
$493.88
$448.98 × 110% = $493.88
A contract may specify another Medicare year or additional adjustments. This is percentage arithmetic on the displayed base rate, not a claim adjudication.
Working with a whole code list?
Compare an offer across your annual code mix, including an older Medicare schedule or flat per-code rates.
How this local rate is calculated
Each RVU component is multiplied by its own geographic practice cost index (GPCI). The three adjusted components are added, then multiplied by the conversion factor. These are the inputs used for 23101 in Chico.
PPRRVU2026_Oct_nonQPP.csv
2,164
- Code
- 23101
- Physician work
- 5.58
- Practice expense
- 6.50
- Malpractice
- 1.20
GPCI2026.csv
9
- Locality
- Chico
- Physician work
- 1.017
- Practice expense
- 1.096
- Malpractice
- 0.536
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 5.58 | × 1.017 | 5.6749 |
| Practice expense | 6.50 | × 1.096 | 7.1240 |
| Malpractice | 1.20 | × 0.536 | 0.6432 |
| Total RVUs | 13.4421 | ||
| Conversion factor | × 33.4009 | ||
Facility rate, Chico$448.98
Open 23101 in the RVU calculator →
Explore RVUs, geographic factors and the full formula
Facility
| Component | RVU | Local GPCI |
|---|---|---|
| Work | 5.58 | 1.017 |
| Practice expense | 6.5 | 1.096 |
| Malpractice | 1.2 | 0.536 |
(5.58 × 1.017 + 6.5 × 1.096 + 1.2 × 0.536) × $33.4009 = $448.98
The office and facility calculations use their respective practice-expense RVUs. The facility amount here is the physician fee, not a separate hospital or facility bill.
How this rate has changed
23101 · Office / nonfacility
Rate unavailable
Effective 2026-10-01
A rate is unavailable in one of these releases, so a change cannot be calculated.
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
Explore release dates and calculate this code in an earlier period →
Each row uses the accepted CMS release effective on that date and the same contractor and locality identifiers. Missing rates stay visible. Historical boundaries may differ; verify the service address for an older claim.
Inspect every release and its CMS source
| Effective from | Office / nonfacility | Facility | CMS release |
|---|---|---|---|
| 2026-10-01 | Not available in this setting | $448.98 | RVU26D |
| 2026-07-01 | Not available in this setting | $448.98 | RVU26C |
| 2026-04-01 | Not available in this setting | $448.98 | RVU26B |
| 2026-01-01 | Not available in this setting | $448.98 | RVU26A |
| 2025-10-01 | Not available in this setting | $465.65 | RVU25D |
| 2025-07-01 | Not available in this setting | $465.65 | RVU25C |
| 2025-04-01 | Not available in this setting | $465.65 | RVU25B |
| 2025-01-01 | Not available in this setting | $465.65 | RVU25A |
23101 billing questions
How is 23101 distinguished from 23100?
23101 is for an open AC or SC joint procedure that includes biopsy; 23100 is for the glenohumeral joint. The operative note should make the joint site clear.
Can the biopsy be reported separately?
Biopsy is included when performed through the arthrotomy reported with 23101. Do not report the same joint tissue sampling as a separate biopsy service.
When is 23106 a closer fit?
23106 describes sternoclavicular arthrotomy with synovectomy. Use the code matching the documented procedure rather than treating a synovectomy as a biopsy.
How is bilateral surgery reported?
When the procedure is performed on both sides, report modifier 50; CMS pays the bilateral procedure at 150%.
Can an assistant-at-surgery claim be submitted?
CMS does not pay an assistant at surgery for this code under the statutory restriction.
What documentation supports 23101?
Document the AC or SC joint, laterality, open approach, and the work performed, including any biopsy. The operative report should distinguish this joint procedure from glenohumeral surgery or clavicle resection.
Where these rates come from
FeeBase calculates base physician payments from CMS work, practice-expense, and malpractice RVUs, adjusted by each locality’s geographic indices and the applicable conversion factor. Unavailable or separately priced services are labeled rather than assigned a made-up amount.
Source: RVU26D. Effective 2026-10-01 through the day before 2027-01-01.
2,16123077,,Rad rescj tum shoulder<5 cm,A,,17.22,10.33,NA,10.33,,3.93,31.48,31.48,0,090,0.10,0.69,0.21,2,1,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
2,16223078,,Rad rescj tum shoulder 5cm/>,A,,21.99,12.68,NA,12.68,,5.02,39.69,39.69,0,090,0.10,0.69,0.21,2,1,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
2,16323100,,Arthrotomy glenhumrl jt w/bx,A,,6.05,7.37,NA,7.37,,1.29,14.71,14.71,0,090,0.10,0.69,0.21,2,1,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
2,16423101,,Arthrt acrmclv/strnclav jt,A,,5.58,6.50,NA,6.50,,1.20,13.28,13.28,0,090,0.10,0.69,0.21,2,1,1,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
2,16523105,,Arthrotomy glenohumeral jt,A,,8.27,8.13,NA,8.13,,1.72,18.12,18.12,0,090,0.10,0.69,0.21,2,1,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
2,16623106,,Arthrotomy strnclav joint,A,,5.98,7.35,NA,7.35,,1.28,14.61,14.61,0,090,0.10,0.69,0.21,2,1,1,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
2,16723107,,Arthrt glenhumrl jt w/expl,A,,8.65,8.30,NA,8.30,,1.80,18.75,18.75,0,090,0.10,0.69,0.21,2,1,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
603102,AZ,00,ARIZONA,1.000,0.969,0.856
707102,AR,13,ARKANSAS,1.000,0.859,0.515
801112,CA,54,BAKERSFIELD,1.019,1.096,0.609
901112,CA,55,CHICO,1.017,1.096,0.536
1001182,CA,71,EL CENTRO,1.017,1.096,0.541
1101112,CA,56,FRESNO,1.017,1.096,0.536
1201112,CA,57,HANFORD-CORCORAN,1.017,1.096,0.536