Choose 31295 for dilation of the maxillary sinus opening; 31296 is specific to the frontal sinus opening.
On this page
CMS RVU26D · Effective 2026-10-01
31296 in Delaware
Office / nonfacility
$1584.44
Base rate per service
Facility setting
$150.92
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.
Nasal and sinus endoscopy
About 31296: Endoscopic frontal sinus ostium dilation
Report this service for endoscopic dilation of a frontal sinus opening, commonly using a balloon to improve drainage without removing sinus tissue.
An otolaryngologist typically performs this procedure by guiding an endoscope through the nose to the frontal sinus opening and dilating the ostium, often with a balloon catheter. It may be performed in an office or an operating room for a patient with frontal sinus drainage problems. The service is specific to the frontal sinus; dilation of a maxillary or sphenoid sinus is represented by a different site-specific code.
Report 31296 when the documented work is dilation of the frontal sinus ostium. The operative note should identify the treated sinus and side, describe the endoscopic dilation, and support the clinical need. It has a 0-day global period, so same-day preoperative and postoperative care is included. When related endoscopies are performed together, endoscopy family pricing applies. For bilateral treatment, modifier 50 is paid at 150%. An assistant at surgery may be paid; co-surgeons and team surgery are not permitted.
CMS billing rules for 31296
- Global period
- Minor procedure with a 0-day global period: same-day preoperative and postoperative care is included.
- Multiple procedures
- Endoscopy family pricing applies when related endoscopies are performed together.
- Bilateral procedures
- Bilateral procedure with modifier 50 is paid at 150%.
- Assistant at surgery
- Assistant at surgery may be paid.
- Co-surgeons
- Co-surgeons not permitted.
- Team surgery
- Team surgery not permitted.
Where the value comes from
- Work RVU3.02 · 6%
- Practice expense (office) RVU44.55 · 93%
- Malpractice RVU0.43 · 1%
5K
Medicare services in 2024 · #1873 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.
31296 compared with similar codes
Office rates for Delaware, from the same CMS release.
Choose 31297 for dilation of the sphenoid sinus opening; 31296 is specific to the frontal sinus opening.
31298 describes dilation of both frontal and sphenoid sinus openings. Use 31296 when the documented dilation is limited to the frontal sinus.
31276 describes frontal sinus exploration with tissue removal when performed. 31296 represents dilation of the frontal sinus opening, not tissue removal.
The same code, a different location
How does Delaware compare?
31296 across payment areas
Same release and payment basis · bars start at $0
Delaware · This locality
$1584.44
$290.42 higher than Delaware
$1875.18
$290.74 higher than Delaware
$1686.21
$101.77 higher than Delaware
$1629.99
$45.55 higher than Delaware
$1859.17
$274.73 higher than Delaware
$1743.95
$159.51 higher than Delaware
Other payment areas listed in Delaware appear first, followed by selected cross-country examples. The chart compares amounts, not distance.
Across 109 of 109 CMS payment localities with a supported office rate, 31296 ranges from $1386.47 in Arkansas to $2265.38 in San Jose-Sunnyvale-Santa Clara (San Benito Cnty). This is a geographic range, not an average.
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 · 31296
Office
$1411.01
Facility
$141.44
$173.43 lower than Delaware for the office setting.
Arkansas
Arkansas · 31296
Office
$1386.47
Facility
$140.11
$197.97 lower than Delaware for the office setting.
Arizona
Arizona · 31296
Office
$1555.05
Facility
$149.09
$29.39 lower than Delaware for the office setting.
Bakersfield
California · 31296
Office
$1742.39
Facility
$152.17
$157.95 higher than Delaware for the office setting.
Chico
California · 31296
Office
$1741.14
Facility
$150.92
$156.70 higher than Delaware for the office setting.
El Centro
California · 31296
Office
$1741.21
Facility
$150.99
$156.77 higher than Delaware for the office setting.
Fresno
California · 31296
Office
$1741.14
Facility
$150.92
$156.70 higher than Delaware for the office setting.
Hanford-Corcoran
California · 31296
Office
$1741.14
Facility
$150.92
$156.70 higher than Delaware for the office setting.
Madera
California · 31296
Office
$1741.14
Facility
$150.92
$156.70 higher than Delaware for the office setting.
Merced
California · 31296
Office
$1741.14
Facility
$150.92
$156.70 higher than Delaware for the office setting.
Modesto
California · 31296
Office
$1741.14
Facility
$150.92
$156.70 higher than Delaware for the office setting.
Napa
California · 31296
Office
$2075.72
Facility
$163.39
$491.28 higher than Delaware for the office setting.
Oxnard-Thousand Oaks-Ventura
California · 31296
Office
$1871.47
Facility
$156.47
$287.03 higher than Delaware for the office setting.
Redding
California · 31296
Office
$1741.14
Facility
$150.92
$156.70 higher than Delaware for the office setting.
Rest Of California
California · 31296
Office
$1741.14
Facility
$150.92
$156.70 higher than Delaware for the office setting.
Riverside-San Bernardino-Ontario
California · 31296
Office
$1745.80
Facility
$155.57
$161.36 higher than Delaware for the office setting.
Sacramento-Roseville-Folsom
California · 31296
Office
$1842.76
Facility
$155.32
$258.32 higher than Delaware for the office setting.
Salinas
California · 31296
Office
$1836.30
Facility
$154.67
$251.86 higher than Delaware for the office setting.
San Diego-Chula Vista-Carlsbad
California · 31296
Office
$1891.34
Facility
$156.02
$306.90 higher than Delaware for the office setting.
San Francisco-Oakland-Berkeley (Marin Cnty)
California · 31296
Office
$2215.14
Facility
$169.32
$630.70 higher than Delaware for the office setting.
San Francisco-Oakland-Berkeley (San Francisco/San Mateo/Alameda/Contra Costa Cnty)
California · 31296
Office
$2214.65
Facility
$168.83
$630.21 higher than Delaware for the office setting.
San Jose-Sunnyvale-Santa Clara (San Benito Cnty)
California · 31296
Office
$2265.38
Facility
$173.13
$680.94 higher than Delaware for the office setting.
San Jose-Sunnyvale-Santa Clara (Santa Clara Cnty)
California · 31296
Office
$2263.38
Facility
$171.13
$678.94 higher than Delaware for the office setting.
San Luis Obispo-Paso Robles
California · 31296
Office
$1805.13
Facility
$152.51
$220.69 higher than Delaware for the office setting.
Santa Cruz-Watsonville
California · 31296
Office
$1918.62
Facility
$155.73
$334.18 higher than Delaware for the office setting.
Santa Maria-Santa Barbara
California · 31296
Office
$1846.41
Facility
$154.62
$261.97 higher than Delaware for the office setting.
Santa Rosa-Petaluma
California · 31296
Office
$1938.87
Facility
$157.12
$354.43 higher than Delaware for the office setting.
Stockton
California · 31296
Office
$1741.14
Facility
$150.92
$156.70 higher than Delaware for the office setting.
Vallejo
California · 31296
Office
$2075.02
Facility
$162.68
$490.58 higher than Delaware for the office setting.
Visalia
California · 31296
Office
$1741.14
Facility
$150.92
$156.70 higher than Delaware for the office setting.
Yuba City
California · 31296
Office
$1741.14
Facility
$150.92
$156.70 higher than Delaware for the office setting.
Colorado
Colorado · 31296
Office
$1696.54
Facility
$152.75
$112.10 higher than Delaware for the office setting.
Connecticut
Connecticut · 31296
Office
$1722.85
Facility
$160.20
$138.41 higher than Delaware for the office setting.
Fort Lauderdale
Florida · 31296
Office
$1634.19
Facility
$164.39
$49.75 higher than Delaware for the office setting.
Rest Of Florida
Florida · 31296
Office
$1545.00
Facility
$157.90
$39.44 lower than Delaware for the office setting.
Atlanta
Georgia · 31296
Office
$1630.24
Facility
$156.09
$45.80 higher than Delaware for the office setting.
Rest Of Georgia
Georgia · 31296
Office
$1445.30
Facility
$151.06
$139.14 lower than Delaware for the office setting.
Hawaii, Guam
Hawaii · 31296
Office
$1801.05
Facility
$151.34
$216.61 higher than Delaware for the office setting.
Iowa
Iowa · 31296
Office
$1468.10
Facility
$140.50
$116.34 lower than Delaware for the office setting.
Idaho
Idaho · 31296
Office
$1476.63
Facility
$141.77
$107.81 lower than Delaware for the office setting.
East St. Louis
Illinois · 31296
Office
$1498.77
Facility
$163.91
$85.67 lower than Delaware for the office setting.
Rest Of Illinois
Illinois · 31296
Office
$1481.87
Facility
$157.17
$102.57 lower than Delaware for the office setting.
Suburban Chicago
Illinois · 31296
Office
$1655.21
Facility
$165.10
$70.77 higher than Delaware for the office setting.
Indiana
Indiana · 31296
Office
$1487.24
Facility
$142.22
$97.20 lower than Delaware for the office setting.
Kansas
Kansas · 31296
Office
$1453.27
Facility
$141.63
$131.17 lower than Delaware for the office setting.
Kentucky
Kentucky · 31296
Office
$1436.85
Facility
$146.97
$147.59 lower than Delaware for the office setting.
New Orleans
Louisiana · 31296
Office
$1517.40
Facility
$152.07
$67.04 lower than Delaware for the office setting.
Rest Of Louisiana
Louisiana · 31296
Office
$1431.52
Facility
$147.44
$152.92 lower than Delaware for the office setting.
Metropolitan Boston
Massachusetts · 31296
Office
$1894.47
Facility
$162.06
$310.03 higher than Delaware for the office setting.
Rest Of Massachusetts
Massachusetts · 31296
Office
$1680.81
Facility
$152.97
$96.37 higher than Delaware for the office setting.
Baltimore/Surr. Cntys
Maryland · 31296
Office
$1716.89
Facility
$160.03
$132.45 higher than Delaware for the office setting.
Rest Of Maryland
Maryland · 31296
Office
$1620.93
Facility
$152.58
$36.49 higher than Delaware for the office setting.
Rest Of Maine
Maine · 31296
Office
$1478.77
Facility
$143.91
$105.67 lower than Delaware for the office setting.
Southern Maine
Maine · 31296
Office
$1584.55
Facility
$146.67
$0.11 higher than Delaware for the office setting.
Detroit
Michigan · 31296
Office
$1561.02
Facility
$160.86
$23.42 lower than Delaware for the office setting.
Rest Of Michigan
Michigan · 31296
Office
$1475.64
Facility
$150.94
$108.80 lower than Delaware for the office setting.
Minnesota
Minnesota · 31296
Office
$1636.28
Facility
$143.27
$51.84 higher than Delaware for the office setting.
Metropolitan Kansas City
Missouri · 31296
Office
$1512.14
Facility
$149.72
$72.30 lower than Delaware for the office setting.
Metropolitan St. Louis
Missouri · 31296
Office
$1531.85
Facility
$150.56
$52.59 lower than Delaware for the office setting.
Rest Of Missouri
Missouri · 31296
Office
$1397.52
Facility
$146.82
$186.92 lower than Delaware for the office setting.
Mississippi
Mississippi · 31296
Office
$1392.66
Facility
$143.41
$191.78 lower than Delaware for the office setting.
Montana**
Montana · 31296
Office
$1603.21
Facility
$152.28
$18.77 higher than Delaware for the office setting.
North Carolina
North Carolina · 31296
Office
$1498.36
Facility
$144.64
$86.08 lower than Delaware for the office setting.
North Dakota**
North Dakota · 31296
Office
$1594.71
Facility
$143.78
$10.27 higher than Delaware for the office setting.
Nebraska
Nebraska · 31296
Office
$1479.73
Facility
$140.52
$104.71 lower than Delaware for the office setting.
New Hampshire
New Hampshire · 31296
Office
$1662.46
Facility
$152.03
$78.02 higher than Delaware for the office setting.
Northern Nj
New Jersey · 31296
Office
$1848.66
Facility
$165.57
$264.22 higher than Delaware for the office setting.
Rest Of New Jersey
New Jersey · 31296
Office
$1745.57
Facility
$161.15
$161.13 higher than Delaware for the office setting.
New Mexico
New Mexico · 31296
Office
$1482.63
Facility
$152.12
$101.81 lower than Delaware for the office setting.
Nevada**
Nevada · 31296
Office
$1602.33
Facility
$149.95
$17.89 higher than Delaware for the office setting.
Nyc Suburbs/Long Island
New York · 31296
Office
$1903.24
Facility
$178.08
$318.80 higher than Delaware for the office setting.
Poughkpsie/N Nyc Suburbs
New York · 31296
Office
$1752.16
Facility
$163.39
$167.72 higher than Delaware for the office setting.
Queens
New York · 31296
Office
$1886.86
Facility
$171.86
$302.42 higher than Delaware for the office setting.
Rest Of New York
New York · 31296
Office
$1524.58
Facility
$146.19
$59.86 lower than Delaware for the office setting.
Ohio
Ohio · 31296
Office
$1473.90
Facility
$149.20
$110.54 lower than Delaware for the office setting.
Oklahoma
Oklahoma · 31296
Office
$1440.82
Facility
$145.14
$143.62 lower than Delaware for the office setting.
Portland
Oregon · 31296
Office
$1766.35
Facility
$154.36
$181.91 higher than Delaware for the office setting.
Rest Of Oregon
Oregon · 31296
Office
$1593.03
Facility
$147.89
$8.59 higher than Delaware for the office setting.
Metropolitan Philadelphia
Pennsylvania · 31296
Office
$1668.84
Facility
$158.42
$84.40 higher than Delaware for the office setting.
Rest Of Pennsylvania
Pennsylvania · 31296
Office
$1480.44
Facility
$148.48
$104.00 lower than Delaware for the office setting.
Puerto Rico
Puerto Rico · 31296
Office
$1619.40
Facility
$152.50
$34.96 higher than Delaware for the office setting.
Rhode Island
Rhode Island · 31296
Office
$1652.71
Facility
$153.90
$68.27 higher than Delaware for the office setting.
South Carolina
South Carolina · 31296
Office
$1488.00
Facility
$147.34
$96.44 lower than Delaware for the office setting.
South Dakota**
South Dakota · 31296
Office
$1593.71
Facility
$142.77
$9.27 higher than Delaware for the office setting.
Tennessee
Tennessee · 31296
Office
$1461.18
Facility
$142.28
$123.26 lower than Delaware for the office setting.
Austin
Texas · 31296
Office
$1688.11
Facility
$153.02
$103.67 higher than Delaware for the office setting.
Beaumont
Texas · 31296
Office
$1468.30
Facility
$147.95
$116.14 lower than Delaware for the office setting.
Brazoria
Texas · 31296
Office
$1587.50
Facility
$149.62
$3.06 higher than Delaware for the office setting.
Dallas
Texas · 31296
Office
$1596.16
Facility
$151.03
$11.72 higher than Delaware for the office setting.
Fort Worth
Texas · 31296
Office
$1581.47
Facility
$150.84
$2.97 lower than Delaware for the office setting.
Galveston
Texas · 31296
Office
$1591.16
Facility
$150.39
$6.72 higher than Delaware for the office setting.
Houston
Texas · 31296
Office
$1599.03
Facility
$158.26
$14.59 higher than Delaware for the office setting.
Rest Of Texas
Texas · 31296
Office
$1525.96
Facility
$149.02
$58.48 lower than Delaware for the office setting.
Utah
Utah · 31296
Office
$1512.50
Facility
$148.62
$71.94 lower than Delaware for the office setting.
Virginia
Virginia · 31296
Office
$1573.72
Facility
$147.46
$10.72 lower than Delaware for the office setting.
Virgin Islands
United States Virgin Islands · 31296
Office
$1619.40
Facility
$152.50
$34.96 higher than Delaware for the office setting.
Vermont
Vermont · 31296
Office
$1581.27
Facility
$144.84
$3.17 lower than Delaware for the office setting.
Rest Of Washington
Washington · 31296
Office
$1679.99
Facility
$152.15
$95.55 higher than Delaware for the office setting.
Seattle (King Cnty)
Washington · 31296
Office
$1943.44
Facility
$163.14
$359.00 higher than Delaware for the office setting.
Wisconsin
Wisconsin · 31296
Office
$1530.81
Facility
$140.81
$53.63 lower than Delaware for the office setting.
West Virginia
West Virginia · 31296
Office
$1414.50
Facility
$153.64
$169.94 lower than Delaware for the office setting.
Wyoming**
Wyoming · 31296
Office
$1599.51
Facility
$148.57
$15.07 higher than Delaware for the office setting.
See how rates vary across the country
31296 · 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.
$1,386.47
$2,003.26
Color shows the midpoint of each state’s locality range.
View all state and territory rates as a table
| State / territory | Rate range | Localities |
|---|---|---|
| AK | $1,743.95 | 1 |
| AL | $1,411.01 | 1 |
| AR | $1,386.47 | 1 |
| AZ | $1,555.05 | 1 |
| CA | $1,741.14–$2,265.38 | 29 |
| CO | $1,696.54 | 1 |
| CT | $1,722.85 | 1 |
| DC | $1,875.18 | 1 |
| DE | $1,584.44 | 1 |
| FL | $1,545.00–$1,686.21 | 3 |
| GA | $1,445.30–$1,630.24 | 2 |
| GU | $1,801.05 | 1 |
| HI | $1,801.05 | 1 |
| IA | $1,468.10 | 1 |
| ID | $1,476.63 | 1 |
| IL | $1,481.87–$1,655.21 | 4 |
| IN | $1,487.24 | 1 |
| KS | $1,453.27 | 1 |
| KY | $1,436.85 | 1 |
| LA | $1,431.52–$1,517.40 | 2 |
| MA | $1,680.81–$1,894.47 | 2 |
| MD | $1,620.93–$1,875.18 | 3 |
| ME | $1,478.77–$1,584.55 | 2 |
| MI | $1,475.64–$1,561.02 | 2 |
| MN | $1,636.28 | 1 |
| MO | $1,397.52–$1,531.85 | 3 |
| MS | $1,392.66 | 1 |
| MT | $1,603.21 | 1 |
| NC | $1,498.36 | 1 |
| ND | $1,594.71 | 1 |
| NE | $1,479.73 | 1 |
| NH | $1,662.46 | 1 |
| NJ | $1,745.57–$1,848.66 | 2 |
| NM | $1,482.63 | 1 |
| NV | $1,602.33 | 1 |
| NY | $1,524.58–$1,903.24 | 5 |
| OH | $1,473.90 | 1 |
| OK | $1,440.82 | 1 |
| OR | $1,593.03–$1,766.35 | 2 |
| PA | $1,480.44–$1,668.84 | 2 |
| PR | $1,619.40 | 1 |
| RI | $1,652.71 | 1 |
| SC | $1,488.00 | 1 |
| SD | $1,593.71 | 1 |
| TN | $1,461.18 | 1 |
| TX | $1,468.30–$1,688.11 | 8 |
| UT | $1,512.50 | 1 |
| VA | $1,573.72–$1,875.18 | 2 |
| VI | $1,619.40 | 1 |
| VT | $1,581.27 | 1 |
| WA | $1,679.99–$1,943.44 | 2 |
| WI | $1,530.81 | 1 |
| WV | $1,414.50 | 1 |
| WY | $1,599.51 | 1 |
Where does this rate apply?
Delaware is a Medicare payment area. Our Census mapping connects it to 79 cities and communities in Delaware, 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.
Why are the office and facility amounts different?
For 31296 in Delaware, the physician’s office rate is $1584.44 and the facility-setting rate is $150.92: a difference of $1433.52.
The calculation uses a different practice-expense RVU for each setting. Both amounts here are physician fee-schedule amounts. The facility figure does not include a hospital’s separate charges, so this comparison does not tell you the total cost of receiving care in each setting.
Use this rate
What is a percentage of Medicare worth?
Turn a percentage into dollars for 31296 in Delaware. This uses the base rate on this page, so the locality and release stay consistent.
Reference amount per service
$1742.88
$1584.44 × 110% = $1742.88
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 31296 in Delaware.
PPRRVU2026_Oct_nonQPP.csv
3,551
- Code
- 31296
- Physician work
- 3.02
- Practice expense
- 44.55
- Malpractice
- 0.43
GPCI2026.csv
40
- Locality
- Delaware
- Physician work
- 1.005
- Practice expense
- 0.988
- Malpractice
- 0.899
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 3.02 | × 1.005 | 3.0351 |
| Practice expense | 44.55 | × 0.988 | 44.0154 |
| Malpractice | 0.43 | × 0.899 | 0.3866 |
| Total RVUs | 47.4371 | ||
| Conversion factor | × 33.4009 | ||
Office / nonfacility rate, Delaware$1584.44
Open 31296 in the RVU calculator →
Explore RVUs, geographic factors and the full formula
Office / nonfacility
| Component | RVU | Local GPCI |
|---|---|---|
| Work | 3.02 | 1.005 |
| Practice expense | 44.55 | 0.988 |
| Malpractice | 0.43 | 0.899 |
(3.02 × 1.005 + 44.55 × 0.988 + 0.43 × 0.899) × $33.4009 = $1584.44
Facility
| Component | RVU | Local GPCI |
|---|---|---|
| Work | 3.02 | 1.005 |
| Practice expense | 1.11 | 0.988 |
| Malpractice | 0.43 | 0.899 |
(3.02 × 1.005 + 1.11 × 0.988 + 0.43 × 0.899) × $33.4009 = $150.92
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
31296 · Office / nonfacility
$1584.44
Effective 2026-10-01
The base rate is $48.31 higher than on 2025-10-01, moving from $1536.13 to $1584.44 (3.1%).
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
$1536.13changed to$1584.44
- Conversion factor 32.3465 changed to 33.4009
- Work RVU 3.10 changed to 3.02
- Practice expense RVU 44.27 changed to 44.55
- Malpractice RVU 0.47 changed to 0.43
- Work GPCI 1.009 changed to 1.005
- Practice expense GPCI 0.992 changed to 0.988
- Malpractice GPCI 0.949 changed to 0.899
Held through RVU26B, RVU26C, RVU26D.
January 1, 2025
RVU25A
Earliest loaded release: $1536.13
Held through RVU25B, RVU25C, RVU25D.
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 | $1584.44 | $150.92 | RVU26D |
| 2026-07-01 | $1584.44 | $150.92 | RVU26C |
| 2026-04-01 | $1584.44 | $150.92 | RVU26B |
| 2026-01-01 | $1584.44 | $150.92 | RVU26A |
| 2025-10-01 | $1536.13 | $174.65 | RVU25D |
| 2025-07-01 | $1536.13 | $174.65 | RVU25C |
| 2025-04-01 | $1536.13 | $174.65 | RVU25B |
| 2025-01-01 | $1536.13 | $174.65 | RVU25A |
31296 billing questions
How is 31296 different from 31295 or 31297?
31296 is for dilation of the frontal sinus ostium. Codes 31295 and 31297 describe dilation at the maxillary and sphenoid sinuses, respectively.
When is modifier 50 appropriate?
Use modifier 50 when the frontal sinus dilation is performed bilaterally. CMS identifies bilateral payment at 150%.
Can 31296 be reported with another sinus endoscopy code?
Related endoscopies performed together are subject to endoscopy family pricing. The operative documentation should establish the distinct work and sinus sites treated.
Does the code include same-day postoperative care?
Yes. The 0-day global period includes same-day preoperative and postoperative care.
Can an assistant or co-surgeon be reported?
An assistant at surgery may be paid for this procedure. Co-surgeons and team surgery are not permitted under the CMS rules provided.
What should the operative note identify?
Document the frontal sinus side treated, the endoscopic dilation performed, and the clinical reason for opening the ostium. Distinguish dilation from procedures involving tissue removal.
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.
