$593.94
27330 describes an open arthrotomy biopsy. Use the arthroscopy code when the surgeon obtains the synovial sample through an arthroscope.
On this page
CMS RVU26D · Effective 2026-10-01
27330 in Wyoming**
Office / nonfacility
Not available in this setting
Base rate per service
Facility setting
$403.54
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 27330: Open knee joint lining biopsy
Open knee-joint biopsy code for obtaining synovial lining tissue when persistent synovitis or another intra-articular abnormality requires tissue diagnosis.
27330 represents open entry into the knee joint to obtain a sample of the synovial lining for diagnostic evaluation. An orthopedic surgeon may perform it when persistent, unexplained synovitis or another abnormal joint-lining change requires tissue examination, including evaluation for inflammatory or infectious disease. The specimen may be sent for histology or other laboratory analysis. This is an open biopsy, not an arthroscopic sampling procedure or removal of the joint lining.
Report the code when the operative service includes an arthrotomy to take a biopsy; the operative note should identify the knee, the abnormal tissue sampled, and the biopsy performed. The 90-day global period includes the day-before preoperative visit and 90 days of related postoperative care. When multiple procedures are performed in one session, the highest-valued procedure is paid in full and other procedures receive the standard multiple-procedure reduction. For bilateral procedures, modifier 50 is paid at 150%. Assistant-at-surgery payment is restricted, co-surgeon payment requires supporting documentation, and team surgery is not permitted.
CMS billing rules for 27330
- 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 RVU4.98 · 40%
- Practice expense (office) RVU6.31 · 51%
- Malpractice RVU1.07 · 9%
77
Medicare services in 2024 · #5082 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.
27330 compared with similar codes
Office rates for Wyoming**, from the same CMS release.
No office rate
27330 is reported for open tissue sampling. 27331 describes an open knee procedure directed to exploration, drainage, or foreign-body removal.
No office rate
27330 removes a sample for diagnosis; 27334 is for open synovectomy, in which synovial tissue is removed therapeutically.
The same code, a different location
How does Wyoming** compare?
27330 across payment areas
Same release and payment basis · bars start at $0
Wyoming** · This locality
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.
Unavailable
No comparable rate is available in this setting.
Unavailable
No comparable rate is available in this setting.
Other payment areas listed in Wyoming 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
Alabama
Alabama · 27330
Office
Unavailable
Facility
$370.98
No comparable office rate is available.
Arkansas
Arkansas · 27330
Office
Unavailable
Facility
$365.78
No comparable office rate is available.
Arizona
Arizona · 27330
Office
Unavailable
Facility
$401.16
No comparable office rate is available.
Bakersfield
California · 27330
Office
Unavailable
Facility
$422.25
No comparable office rate is available.
Chico
California · 27330
Office
Unavailable
Facility
$419.31
No comparable office rate is available.
El Centro
California · 27330
Office
Unavailable
Facility
$419.49
No comparable office rate is available.
Fresno
California · 27330
Office
Unavailable
Facility
$419.31
No comparable office rate is available.
Hanford-Corcoran
California · 27330
Office
Unavailable
Facility
$419.31
No comparable office rate is available.
Madera
California · 27330
Office
Unavailable
Facility
$419.31
No comparable office rate is available.
Merced
California · 27330
Office
Unavailable
Facility
$419.31
No comparable office rate is available.
Modesto
California · 27330
Office
Unavailable
Facility
$419.31
No comparable office rate is available.
Napa
California · 27330
Office
Unavailable
Facility
$472.75
No comparable office rate is available.
Oxnard-Thousand Oaks-Ventura
California · 27330
Office
Unavailable
Facility
$442.38
No comparable office rate is available.
Redding
California · 27330
Office
Unavailable
Facility
$419.31
No comparable office rate is available.
Rest Of California
California · 27330
Office
Unavailable
Facility
$419.31
No comparable office rate is available.
Riverside-San Bernardino-Ontario
California · 27330
Office
Unavailable
Facility
$430.81
No comparable office rate is available.
Sacramento-Roseville-Folsom
California · 27330
Office
Unavailable
Facility
$436.59
No comparable office rate is available.
Salinas
California · 27330
Office
Unavailable
Facility
$434.92
No comparable office rate is available.
San Diego-Chula Vista-Carlsbad
California · 27330
Office
Unavailable
Facility
$442.77
No comparable office rate is available.
San Francisco-Oakland-Berkeley (Marin Cnty)
California · 27330
Office
Unavailable
Facility
$495.71
No comparable office rate is available.
San Francisco-Oakland-Berkeley (San Francisco/San Mateo/Alameda/Contra Costa Cnty)
California · 27330
Office
Unavailable
Facility
$494.50
No comparable office rate is available.
San Jose-Sunnyvale-Santa Clara (San Benito Cnty)
California · 27330
Office
Unavailable
Facility
$507.71
No comparable office rate is available.
San Jose-Sunnyvale-Santa Clara (Santa Clara Cnty)
California · 27330
Office
Unavailable
Facility
$502.74
No comparable office rate is available.
San Luis Obispo-Paso Robles
California · 27330
Office
Unavailable
Facility
$428.38
No comparable office rate is available.
Santa Cruz-Watsonville
California · 27330
Office
Unavailable
Facility
$445.06
No comparable office rate is available.
Santa Maria-Santa Barbara
California · 27330
Office
Unavailable
Facility
$435.90
No comparable office rate is available.
Santa Rosa-Petaluma
California · 27330
Office
Unavailable
Facility
$449.30
No comparable office rate is available.
Stockton
California · 27330
Office
Unavailable
Facility
$419.31
No comparable office rate is available.
Vallejo
California · 27330
Office
Unavailable
Facility
$471.00
No comparable office rate is available.
Visalia
California · 27330
Office
Unavailable
Facility
$419.31
No comparable office rate is available.
Yuba City
California · 27330
Office
Unavailable
Facility
$419.31
No comparable office rate is available.
Colorado
Colorado · 27330
Office
Unavailable
Facility
$420.49
No comparable office rate is available.
Connecticut
Connecticut · 27330
Office
Unavailable
Facility
$439.90
No comparable office rate is available.
Delaware
Delaware · 27330
Office
Unavailable
Facility
$407.53
No comparable office rate is available.
Fort Lauderdale
Florida · 27330
Office
Unavailable
Facility
$444.45
No comparable office rate is available.
Rest Of Florida
Florida · 27330
Office
Unavailable
Facility
$421.54
No comparable office rate is available.
Atlanta
Georgia · 27330
Office
Unavailable
Facility
$423.89
No comparable office rate is available.
Rest Of Georgia
Georgia · 27330
Office
Unavailable
Facility
$396.93
No comparable office rate is available.
Hawaii, Guam
Hawaii · 27330
Office
Unavailable
Facility
$426.66
No comparable office rate is available.
Iowa
Iowa · 27330
Office
Unavailable
Facility
$373.37
No comparable office rate is available.
Idaho
Idaho · 27330
Office
Unavailable
Facility
$377.14
No comparable office rate is available.
East St. Louis
Illinois · 27330
Office
Unavailable
Facility
$432.21
No comparable office rate is available.
Rest Of Illinois
Illinois · 27330
Office
Unavailable
Facility
$414.62
No comparable office rate is available.
Suburban Chicago
Illinois · 27330
Office
Unavailable
Facility
$447.28
No comparable office rate is available.
Indiana
Indiana · 27330
Office
Unavailable
Facility
$379.08
No comparable office rate is available.
Kansas
Kansas · 27330
Office
Unavailable
Facility
$374.88
No comparable office rate is available.
Kentucky
Kentucky · 27330
Office
Unavailable
Facility
$386.40
No comparable office rate is available.
New Orleans
Louisiana · 27330
Office
Unavailable
Facility
$405.26
No comparable office rate is available.
Rest Of Louisiana
Louisiana · 27330
Office
Unavailable
Facility
$387.10
No comparable office rate is available.
Metropolitan Boston
Massachusetts · 27330
Office
Unavailable
Facility
$456.61
No comparable office rate is available.
Rest Of Massachusetts
Massachusetts · 27330
Office
Unavailable
Facility
$419.41
No comparable office rate is available.
Baltimore/Surr. Cntys
Maryland · 27330
Office
Unavailable
Facility
$439.35
No comparable office rate is available.
Rest Of Maryland
Maryland · 27330
Office
Unavailable
Facility
$414.10
No comparable office rate is available.
Rest Of Maine
Maine · 27330
Office
Unavailable
Facility
$382.47
No comparable office rate is available.
Southern Maine
Maine · 27330
Office
Unavailable
Facility
$397.75
No comparable office rate is available.
Detroit
Michigan · 27330
Office
Unavailable
Facility
$429.98
No comparable office rate is available.
Rest Of Michigan
Michigan · 27330
Office
Unavailable
Facility
$399.11
No comparable office rate is available.
Minnesota
Minnesota · 27330
Office
Unavailable
Facility
$393.79
No comparable office rate is available.
Metropolitan Kansas City
Missouri · 27330
Office
Unavailable
Facility
$399.16
No comparable office rate is available.
Metropolitan St. Louis
Missouri · 27330
Office
Unavailable
Facility
$402.79
No comparable office rate is available.
Rest Of Missouri
Missouri · 27330
Office
Unavailable
Facility
$382.82
No comparable office rate is available.
Mississippi
Mississippi · 27330
Office
Unavailable
Facility
$374.21
No comparable office rate is available.
Montana**
Montana · 27330
Office
Unavailable
Facility
$412.76
No comparable office rate is available.
North Carolina
North Carolina · 27330
Office
Unavailable
Facility
$385.81
No comparable office rate is available.
North Dakota**
North Dakota · 27330
Office
Unavailable
Facility
$391.61
No comparable office rate is available.
Nebraska
Nebraska · 27330
Office
Unavailable
Facility
$374.38
No comparable office rate is available.
New Hampshire
New Hampshire · 27330
Office
Unavailable
Facility
$417.01
No comparable office rate is available.
Northern Nj
New Jersey · 27330
Office
Unavailable
Facility
$459.47
No comparable office rate is available.
Rest Of New Jersey
New Jersey · 27330
Office
Unavailable
Facility
$442.35
No comparable office rate is available.
New Mexico
New Mexico · 27330
Office
Unavailable
Facility
$402.53
No comparable office rate is available.
Nevada**
Nevada · 27330
Office
Unavailable
Facility
$407.08
No comparable office rate is available.
Nyc Suburbs/Long Island
New York · 27330
Office
Unavailable
Facility
$493.94
No comparable office rate is available.
Poughkpsie/N Nyc Suburbs
New York · 27330
Office
Unavailable
Facility
$447.85
No comparable office rate is available.
Queens
New York · 27330
Office
Unavailable
Facility
$477.64
No comparable office rate is available.
Rest Of New York
New York · 27330
Office
Unavailable
Facility
$391.68
No comparable office rate is available.
Ohio
Ohio · 27330
Office
Unavailable
Facility
$394.78
No comparable office rate is available.
Oklahoma
Oklahoma · 27330
Office
Unavailable
Facility
$382.31
No comparable office rate is available.
Portland
Oregon · 27330
Office
Unavailable
Facility
$429.74
No comparable office rate is available.
Rest Of Oregon
Oregon · 27330
Office
Unavailable
Facility
$401.38
No comparable office rate is available.
Metropolitan Philadelphia
Pennsylvania · 27330
Office
Unavailable
Facility
$431.37
No comparable office rate is available.
Rest Of Pennsylvania
Pennsylvania · 27330
Office
Unavailable
Facility
$393.59
No comparable office rate is available.
Puerto Rico
Puerto Rico · 27330
Office
Unavailable
Facility
$414.62
No comparable office rate is available.
Rhode Island
Rhode Island · 27330
Office
Unavailable
Facility
$419.09
No comparable office rate is available.
South Carolina
South Carolina · 27330
Office
Unavailable
Facility
$391.46
No comparable office rate is available.
South Dakota**
South Dakota · 27330
Office
Unavailable
Facility
$389.10
No comparable office rate is available.
Tennessee
Tennessee · 27330
Office
Unavailable
Facility
$377.11
No comparable office rate is available.
Austin
Texas · 27330
Office
Unavailable
Facility
$421.32
No comparable office rate is available.
Beaumont
Texas · 27330
Office
Unavailable
Facility
$391.33
No comparable office rate is available.
Brazoria
Texas · 27330
Office
Unavailable
Facility
$404.41
No comparable office rate is available.
Dallas
Texas · 27330
Office
Unavailable
Facility
$408.41
No comparable office rate is available.
Fort Worth
Texas · 27330
Office
Unavailable
Facility
$406.77
No comparable office rate is available.
Galveston
Texas · 27330
Office
Unavailable
Facility
$406.54
No comparable office rate is available.
Houston
Texas · 27330
Office
Unavailable
Facility
$426.13
No comparable office rate is available.
Rest Of Texas
Texas · 27330
Office
Unavailable
Facility
$398.62
No comparable office rate is available.
Utah
Utah · 27330
Office
Unavailable
Facility
$396.54
No comparable office rate is available.
Virginia
Virginia · 27330
Office
Unavailable
Facility
$398.74
No comparable office rate is available.
Virgin Islands
United States Virgin Islands · 27330
Office
Unavailable
Facility
$414.62
No comparable office rate is available.
Vermont
Vermont · 27330
Office
Unavailable
Facility
$393.07
No comparable office rate is available.
Rest Of Washington
Washington · 27330
Office
Unavailable
Facility
$417.63
No comparable office rate is available.
Seattle (King Cnty)
Washington · 27330
Office
Unavailable
Facility
$462.45
No comparable office rate is available.
Wisconsin
Wisconsin · 27330
Office
Unavailable
Facility
$379.25
No comparable office rate is available.
West Virginia
West Virginia · 27330
Office
Unavailable
Facility
$400.63
No comparable office rate is available.
See how rates vary across the country
27330 · 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?
Wyoming** is a Medicare payment area. Our Census mapping connects it to 205 cities and communities in Wyoming, 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 27330 in Wyoming**. This uses the base rate on this page, so the locality and release stay consistent.
Reference amount per service
$443.89
$403.54 × 110% = $443.89
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 27330 in Wyoming**.
PPRRVU2026_Oct_nonQPP.csv
2,841
- Code
- 27330
- Physician work
- 4.98
- Practice expense
- 6.31
- Malpractice
- 1.07
GPCI2026.csv
112
- Locality
- Wyoming**
- Physician work
- 1.000
- Practice expense
- 1.000
- Malpractice
- 0.740
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 4.98 | × 1.000 | 4.9800 |
| Practice expense | 6.31 | × 1.000 | 6.3100 |
| Malpractice | 1.07 | × 0.740 | 0.7918 |
| Total RVUs | 12.0818 | ||
| Conversion factor | × 33.4009 | ||
Facility rate, Wyoming**$403.54
Open 27330 in the RVU calculator →
Explore RVUs, geographic factors and the full formula
Facility
| Component | RVU | Local GPCI |
|---|---|---|
| Work | 4.98 | 1 |
| Practice expense | 6.31 | 1 |
| Malpractice | 1.07 | 0.74 |
(4.98 × 1 + 6.31 × 1 + 1.07 × 0.74) × $33.4009 = $403.54
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
27330 · 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 | $403.54 | RVU26D |
| 2026-07-01 | Not available in this setting | $403.54 | RVU26C |
| 2026-04-01 | Not available in this setting | $403.54 | RVU26B |
| 2026-01-01 | Not available in this setting | $403.54 | RVU26A |
| 2025-10-01 | Not available in this setting | $415.28 | RVU25D |
| 2025-07-01 | Not available in this setting | $415.28 | RVU25C |
| 2025-04-01 | Not available in this setting | $415.28 | RVU25B |
| 2025-01-01 | Not available in this setting | $415.28 | RVU25A |
27330 billing questions
When should 27330 be chosen instead of an arthroscopic knee biopsy?
Use 27330 for an open arthrotomy performed to sample the knee lining. When the biopsy is obtained arthroscopically, consider the applicable arthroscopy code, such as 29870.
Does 27330 include the pathology examination?
The code represents obtaining the tissue through the open procedure. Histologic examination is a separate laboratory service when performed and reportable by the pathology provider.
What documentation supports reporting 27330?
Document the knee side, the reason tissue diagnosis was needed, the synovial or other intra-articular tissue sampled, and the open biopsy performed.
Can 27330 be reported bilaterally?
For a bilateral procedure, CMS pays 150% when modifier 50 is reported. The operative documentation should support biopsy of both knees.
How does the global period affect postoperative visits?
27330 has a 90-day global period. The day-before preoperative visit and 90 days of related postoperative care are included.
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.
2,83827327,,Exc thigh/knee les sc < 3 cm,A,,3.86,11.42,,4.52,,0.87,16.15,9.25,0,090,0.10,0.69,0.21,2,1,1,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
2,83927328,,Exc thigh/knee tum deep <5cm,A,,8.63,7.08,NA,7.08,,1.96,17.67,17.67,0,090,0.10,0.69,0.21,2,1,1,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
2,84027329,,Resect thigh/knee tum < 5 cm,A,,15.33,10.11,NA,10.11,,3.48,28.92,28.92,0,090,0.10,0.69,0.21,2,1,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
2,84127330,,Biopsy knee joint lining,A,,4.98,6.31,NA,6.31,,1.07,12.36,12.36,0,090,0.10,0.69,0.21,2,1,1,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
2,84227331,,Explore/treat knee joint,A,,5.87,6.66,NA,6.66,,1.23,13.76,13.76,0,090,0.10,0.69,0.21,2,1,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
2,84327332,,Removal of knee cartilage,A,,8.25,8.41,NA,8.41,,1.75,18.41,18.41,0,090,0.10,0.69,0.21,2,1,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
2,84427333,,Removal of knee cartilage,A,,7.36,7.98,NA,7.98,,1.56,16.90,16.90,0,090,0.10,0.69,0.21,2,1,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
10902402,WA,99,REST OF WASHINGTON,1.013,1.053,0.761
11011402,WV,16,WEST VIRGINIA,1.000,0.869,1.431
11106302,WI,00,WISCONSIN,1.000,0.958,0.308
11203602,WY,21,WYOMING**,1.000,1.000,0.740
113"MAC Assignments as of November 22, 2023",,,,,,
114,,,,,,
115*Work GPCI reflects a 1.5 floor in Alaska established by the MIPPA.,,,,,,