CPT code 88188: Flow cytometry, 9–15 markers2026 Medicare rate & RVUs in Rhode Island
Reports a pathologist’s interpretation of flow cytometry findings when the analysis includes 9–15 markers, commonly for suspected hematologic malignancy.
In Rhode Island, Medicare pays $59.55 for 88188 in the office and $59.55 when it’s performed in a hospital or facility.
Check a contract rate as a % of Medicare · 88188 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 88188 covers
This service is the professional interpretation and written report of flow cytometry findings from a panel of 9–15 markers. A pathologist or other qualified laboratory professional may evaluate results from peripheral blood, bone marrow, lymph node, or fluid specimens when assessing suspected leukemia, lymphoma, or another hematologic disorder. The report interprets the cell populations and marker pattern in the clinical context; it is not the laboratory work that processes and analyzes the specimen.
Select this code according to the number of markers included in the interpretation: 9–15. The record should support the specimen examined, markers assessed, findings, and resulting interpretation. Report the professional service separately from the applicable technical flow cytometry services; the technical portion is covered by separate codes. This code represents interpretation and reporting only.
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 Rhode Island compares for 88188
Across 109 of 109 payment localities, the office rate for 88188 runs from $55.03 in Arkansas to $78.22 in Alaska. Rhode Island pays $59.55. The RVUs are the same everywhere; the geographic indexes change the dollars.
- Rhode Island · this page$59.55
- Los Angeles, CA · California$62.56+$3.01
- Washington, DC area · District of Columbia$63.88+$4.33
- Miami, FL · Florida$62.23+$2.68
- Chicago, IL · Illinois$61.41+$1.86
- Manhattan, NY · New York$64.94+$5.39
- Alaska · Alaska$78.22+$18.67
Other areas in Rhode Island first, then benchmark localities. Bars start at $0.
Every other payment area
| Payment locality | Office | Facility |
|---|---|---|
| AlabamaAlabama | $55.41 | $55.41 |
| ArkansasArkansas | $55.03 | $55.03 |
| ArizonaArizona | $57.62 | $57.62 |
| Bakersfield, CACalifornia | $60.08 | $60.08 |
| Chico, CACalifornia | $59.85 | $59.85 |
| El Centro, CACalifornia | $59.86 | $59.86 |
| Fresno, CACalifornia | $59.85 | $59.85 |
| Hanford, CACalifornia | $59.85 | $59.85 |
| Madera, CACalifornia | $59.85 | $59.85 |
| Merced, CACalifornia | $59.85 | $59.85 |
| Modesto, CACalifornia | $59.85 | $59.85 |
| Napa, CACalifornia | $65.45 | $65.45 |
| Oxnard, CACalifornia | $61.95 | $61.95 |
| Redding, CACalifornia | $59.85 | $59.85 |
| Rest of CaliforniaCalifornia | $59.85 | $59.85 |
| Riverside, CACalifornia | $60.53 | $60.53 |
| Sacramento, CACalifornia | $61.76 | $61.76 |
| Salinas, CACalifornia | $61.49 | $61.49 |
| San Diego, CACalifornia | $62.11 | $62.11 |
| Marin County, CACalifornia | $68.20 | $68.20 |
| San Francisco, CACalifornia | $68.13 | $68.13 |
| San Benito County, CACalifornia | $69.50 | $69.50 |
| Santa Clara County, CACalifornia | $69.22 | $69.22 |
| San Luis Obispo, CACalifornia | $60.60 | $60.60 |
| Santa Cruz, CACalifornia | $62.08 | $62.08 |
| Santa Maria, CACalifornia | $61.50 | $61.50 |
| Santa Rosa, CACalifornia | $62.65 | $62.65 |
| Stockton, CACalifornia | $59.85 | $59.85 |
| Vallejo, CACalifornia | $65.35 | $65.35 |
| Visalia, CACalifornia | $59.85 | $59.85 |
| Yuba City, CACalifornia | $59.85 | $59.85 |
| ColoradoColorado | $59.59 | $59.59 |
| ConnecticutConnecticut | $60.99 | $60.99 |
| DelawareDelaware | $58.24 | $58.24 |
| Fort Lauderdale, FLFlorida | $60.30 | $60.30 |
| Rest of FloridaFlorida | $58.70 | $58.70 |
| Atlanta, GAGeorgia | $59.25 | $59.25 |
| Rest of GeorgiaGeorgia | $56.96 | $56.96 |
| Hawaii, Guam, HIHawaii | $59.99 | $59.99 |
| IowaIowa | $55.77 | $55.77 |
| IdahoIdaho | $56.01 | $56.01 |
| East St. Louis, ILIllinois | $59.09 | $59.09 |
| Rest of IllinoisIllinois | $58.07 | $58.07 |
| Suburban Chicago, ILIllinois | $60.74 | $60.74 |
| IndianaIndiana | $56.15 | $56.15 |
| KansasKansas | $55.79 | $55.79 |
| KentuckyKentucky | $56.35 | $56.35 |
| New Orleans, LALouisiana | $57.70 | $57.70 |
| Rest of LouisianaLouisiana | $56.37 | $56.37 |
| Metropolitan Boston, MAMassachusetts | $63.20 | $63.20 |
| Rest of MassachusettsMassachusetts | $59.59 | $59.59 |
| Baltimore area, MDMaryland | $60.82 | $60.82 |
| Rest of MarylandMaryland | $58.89 | $58.89 |
| Rest of MaineMaine | $56.30 | $56.30 |
| Southern Maine, MEMaine | $57.56 | $57.56 |
| Detroit, MIMichigan | $59.22 | $59.22 |
| Rest of MichiganMichigan | $57.20 | $57.20 |
| MinnesotaMinnesota | $57.54 | $57.54 |
| Metropolitan Kansas City, MOMissouri | $57.35 | $57.35 |
| Metropolitan St. Louis, MOMissouri | $57.62 | $57.62 |
| Rest of MissouriMissouri | $56.00 | $56.00 |
| MississippiMississippi | $55.51 | $55.51 |
| MontanaMontana | $58.45 | $58.45 |
| North CarolinaNorth Carolina | $56.56 | $56.56 |
| North DakotaNorth Dakota | $57.26 | $57.26 |
| NebraskaNebraska | $55.87 | $55.87 |
| New HampshireNew Hampshire | $58.91 | $58.91 |
| Northern New JerseyNew Jersey | $63.83 | $63.83 |
| Rest of New JerseyNew Jersey | $61.81 | $61.81 |
| New MexicoNew Mexico | $57.41 | $57.41 |
| NevadaNevada | $58.13 | $58.13 |
| NYC suburbs and Long Island, NYNew York | $65.95 | $65.95 |
| Poughkeepsie and northern NYC suburbs, NYNew York | $62.28 | $62.28 |
| Queens, NYNew York | $65.00 | $65.00 |
| Rest of New YorkNew York | $56.99 | $56.99 |
| OhioOhio | $56.96 | $56.96 |
| OklahomaOklahoma | $56.15 | $56.15 |
| Portland, OROregon | $60.49 | $60.49 |
| Rest of OregonOregon | $57.79 | $57.79 |
| Metropolitan Philadelphia, PAPennsylvania | $60.25 | $60.25 |
| Rest of PennsylvaniaPennsylvania | $56.92 | $56.92 |
| Puerto RicoPuerto Rico | $58.61 | $58.61 |
| South CarolinaSouth Carolina | $56.83 | $56.83 |
| South DakotaSouth Dakota | $57.12 | $57.12 |
| TennesseeTennessee | $55.94 | $55.94 |
| Austin, TXTexas | $59.31 | $59.31 |
| Beaumont, TXTexas | $56.75 | $56.75 |
| Brazoria, TXTexas | $58.17 | $58.17 |
| Dallas, TXTexas | $58.45 | $58.45 |
| Fort Worth, TXTexas | $58.30 | $58.30 |
| Galveston, TXTexas | $58.30 | $58.30 |
| Houston, TXTexas | $59.40 | $59.40 |
| Rest of TexasTexas | $57.37 | $57.37 |
| UtahUtah | $57.21 | $57.21 |
| VirginiaVirginia | $57.57 | $57.57 |
| Virgin Islands, VIUnited States Virgin Islands | $58.61 | $58.61 |
| VermontVermont | $57.29 | $57.29 |
| Rest of WashingtonWashington | $59.40 | $59.40 |
| King County, WAWashington | $63.98 | $63.98 |
| WisconsinWisconsin | $56.34 | $56.34 |
| West VirginiaWest Virginia | $57.04 | $57.04 |
| WyomingWyoming | $57.93 | $57.93 |
88188 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.
$55.03
$78.22
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 | $78.22 | 1 |
| AL | $55.41 | 1 |
| AR | $55.03 | 1 |
| AZ | $57.62 | 1 |
| CA | $59.85–$69.50 | 29 |
| CO | $59.59 | 1 |
| CT | $60.99 | 1 |
| DC | $63.88 | 1 |
| DE | $58.24 | 1 |
| FL | $58.70–$62.23 | 3 |
| GA | $56.96–$59.25 | 2 |
| GU | $59.99 | 1 |
| HI | $59.99 | 1 |
| IA | $55.77 | 1 |
| ID | $56.01 | 1 |
| IL | $58.07–$61.41 | 4 |
| IN | $56.15 | 1 |
| KS | $55.79 | 1 |
| KY | $56.35 | 1 |
| LA | $56.37–$57.70 | 2 |
| MA | $59.59–$63.20 | 2 |
| MD | $58.89–$63.88 | 3 |
| ME | $56.30–$57.56 | 2 |
| MI | $57.20–$59.22 | 2 |
| MN | $57.54 | 1 |
| MO | $56.00–$57.62 | 3 |
| MS | $55.51 | 1 |
| MT | $58.45 | 1 |
| NC | $56.56 | 1 |
| ND | $57.26 | 1 |
| NE | $55.87 | 1 |
| NH | $58.91 | 1 |
| NJ | $61.81–$63.83 | 2 |
| NM | $57.41 | 1 |
| NV | $58.13 | 1 |
| NY | $56.99–$65.95 | 5 |
| OH | $56.96 | 1 |
| OK | $56.15 | 1 |
| OR | $57.79–$60.49 | 2 |
| PA | $56.92–$60.25 | 2 |
| PR | $58.61 | 1 |
| RI | $59.55 | 1 |
| SC | $56.83 | 1 |
| SD | $57.12 | 1 |
| TN | $55.94 | 1 |
| TX | $56.75–$59.40 | 8 |
| UT | $57.21 | 1 |
| VA | $57.57–$63.88 | 2 |
| VI | $58.61 | 1 |
| VT | $57.29 | 1 |
| WA | $59.40–$63.98 | 2 |
| WI | $56.34 | 1 |
| WV | $57.04 | 1 |
| WY | $57.93 | 1 |
How the 88188 rate is calculated
Each of 88188’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 · 88188
RVUs × geographic indexes × conversion factor
Work1.17
1.17 RVUs× 1.000 GPCI
Practice expense0.52
0.52 RVUs× 1.000 GPCI
Malpractice0.06
0.06 RVUs× 1.000 GPCI
Adjusted RVUs
1.7500
Conversion factor
$33.4009
Medicare rate
$58.45
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
The exact Rhode Island inputs and CMS source lines
PPRRVU2026_Oct_nonQPP.csv
11,165
- Code
- 88188
- Physician work
- 1.17
- Practice expense
- 0.52
- Malpractice
- 0.06
GPCI2026.csv
92
- Locality
- Rhode Island
- Physician work
- 1.019
- Practice expense
- 1.033
- Malpractice
- 0.892
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 1.17 | × 1.019 | 1.1922 |
| Practice expense | 0.52 | × 1.033 | 0.5372 |
| Malpractice | 0.06 | × 0.892 | 0.0535 |
| Total RVUs | 1.7829 | ||
| Conversion factor | × 33.4009 | ||
Office rate, Rhode Island$59.55
Office: (1.17 × 1.019 + 0.52 × 1.033 + 0.06 × 0.892) × $33.4009 = $59.55
Facility: (1.17 × 1.019 + 0.52 × 1.033 + 0.06 × 0.892) × $33.4009 = $59.55
Payment rules and modifiers for 88188
The CMS indicators that decide how 88188 is paid alongside other services.
CMS payment indicators · 88188
Flow cytometry, 9–15 markers
| Rule | CMS value | What it means |
|---|---|---|
| Global period | XXX | The global surgery concept doesn’t apply. |
| Multiple procedures | 0 | No multiple-procedure reduction. |
| Bilateral (modifier 50) | 0 | The 150% bilateral adjustment doesn’t apply. |
| Assistant at surgery (80/81/82/AS) | 0 | Not paid without supporting documentation. |
| Co-surgeons (62) | 0 | Not permitted. |
| Team surgery (66) | 0 | Not permitted. |
| Professional/technical | 2 | Professional component only. |
How 88188 has changed in Rhode Island
88188 · Office / nonfacility
$59.55
Effective 2026-10-01
The base rate is $0.09 lower than on 2025-10-01, moving from $59.64 to $59.55 (0.2%).
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
$59.64changed to$59.55
- Conversion factor 32.3465 changed to 33.4009
- Work RVU 1.20 changed to 1.17
- Practice expense RVU 0.55 changed to 0.52
- Malpractice RVU 0.05 changed to 0.06
- Work GPCI 1.025 changed to 1.019
- Practice expense GPCI 1.039 changed to 1.033
- Malpractice GPCI 0.849 changed to 0.892
Held through RVU26B, RVU26C, RVU26D.
January 1, 2025
RVU25A
$61.66changed to$59.64
- Conversion factor 33.2875 changed to 32.3465
- Malpractice RVU 0.06 changed to 0.05
Held through RVU25B, RVU25C, RVU25D.
March 9, 2024
RVU24AR
$60.66changed to$61.66
- Conversion factor 32.7442 changed to 33.2875
Held through RVU24B, RVU24C, RVU24D.
January 1, 2024
RVU24A
$63.27changed to$60.66
- Conversion factor 33.8872 changed to 32.7442
- Practice expense RVU 0.56 changed to 0.55
- Work GPCI 1.023 changed to 1.025
- Practice expense GPCI 1.044 changed to 1.039
- Malpractice GPCI 0.915 changed to 0.849
January 1, 2023
RVU23A
$64.70changed to$63.27
- Conversion factor 34.6062 changed to 33.8872
- Practice expense RVU 0.54 changed to 0.56
- Malpractice RVU 0.08 changed to 0.06
- Work GPCI 1.021 changed to 1.023
- Practice expense GPCI 1.048 changed to 1.044
- Malpractice GPCI 0.981 changed to 0.915
Held through RVU23B, RVU23C, RVU23D.
January 1, 2022
RVU22A
$64.57changed to$64.70
- Conversion factor 34.8931 changed to 34.6062
- Practice expense RVU 0.55 changed to 0.54
- Malpractice RVU 0.05 changed to 0.08
Held through RVU22B, RVU22C, RVU22D.
January 1, 2021
RVU21A
$68.07changed to$64.57
- Conversion factor 36.0896 changed to 34.8931
- Practice expense RVU 0.57 changed to 0.55
- Malpractice RVU 0.06 changed to 0.05
- Work GPCI 1.024 changed to 1.021
- Practice expense GPCI 1.049 changed to 1.048
- Malpractice GPCI 0.990 changed to 0.981
Held through RVU21B, RVU21C, RVU21D.
January 1, 2020
RVU20A
$68.14changed to$68.07
- Conversion factor 36.0391 changed to 36.0896
- Work GPCI 1.027 changed to 1.024
- Practice expense GPCI 1.050 changed to 1.049
- Malpractice GPCI 0.999 changed to 0.990
Held through RVU20B, RVU20C, RVU20D.
January 1, 2019
RVU19A
$68.83changed to$68.14
- Conversion factor 35.9996 changed to 36.0391
- Practice expense RVU 0.59 changed to 0.57
Held through RVU19B, RVU19C, RVU19D.
January 1, 2018
RVU18AR1
$77.75changed to$68.83
- Conversion factor 35.8887 changed to 35.9996
- Practice expense RVU 0.84 changed to 0.59
- Work GPCI 1.025 changed to 1.027
- Practice expense GPCI 1.052 changed to 1.050
- Malpractice GPCI 0.879 changed to 0.999
Held through RVU18B, RVU18C, RVU18D.
January 1, 2017
RVU17A
$95.20changed to$77.75
- Conversion factor 35.8043 changed to 35.8887
- Work RVU 1.69 changed to 1.20
- Practice expense RVU 0.82 changed to 0.84
- Malpractice RVU 0.09 changed to 0.06
- Work GPCI 1.022 changed to 1.025
- Practice expense GPCI 1.053 changed to 1.052
- Malpractice GPCI 0.759 changed to 0.879
Held through RVU17B, RVU17C, RVU17D.
January 1, 2016
RVU16A
$94.41changed to$95.20
- Conversion factor 35.9335 changed to 35.8043
- Practice expense RVU 0.79 changed to 0.82
Held through RVU16B, RVU16C, RVU16D.
July 1, 2015
RVU15C
$93.94changed to$94.41
- Conversion factor 35.7547 changed to 35.9335
Held through RVU15D.
January 1, 2015
RVU15A
$92.77changed to$93.94
- Conversion factor 35.8228 changed to 35.7547
- Practice expense RVU 0.73 changed to 0.79
- Malpractice RVU 0.10 changed to 0.09
- Work GPCI 1.020 changed to 1.022
- Malpractice GPCI 0.973 changed to 0.759
Held through RVU15B.
January 1, 2014
RVU14A
No ratechanged to$92.77
Held through RVU14B, RVU14C, RVU14D.
January 1, 2013
RVU13AR
Earliest loaded release: No rate
Held through RVU13B, RVU13C, RVU13D.
| Effective from | Office | Facility | CMS release |
|---|---|---|---|
| 2026-10-01 | $59.55 | $59.55 | RVU26D |
| 2026-07-01 | $59.55 | $59.55 | RVU26C |
| 2026-04-01 | $59.55 | $59.55 | RVU26B |
| 2026-01-01 | $59.55 | $59.55 | RVU26A |
| 2025-10-01 | $59.64 | $59.64 | RVU25D |
| 2025-07-01 | $59.64 | $59.64 | RVU25C |
| 2025-04-01 | $59.64 | $59.64 | RVU25B |
| 2025-01-01 | $59.64 | $59.64 | RVU25A |
| 2024-10-01 | $61.66 | $61.66 | RVU24D |
| 2024-07-01 | $61.66 | $61.66 | RVU24C |
| 2024-04-01 | $61.66 | $61.66 | RVU24B |
| 2024-03-09 | $61.66 | $61.66 | RVU24AR |
| 2024-01-01 | $60.66 | $60.66 | RVU24A |
| 2023-10-01 | $63.27 | $63.27 | RVU23D |
| 2023-07-01 | $63.27 | $63.27 | RVU23C |
| 2023-04-01 | $63.27 | $63.27 | RVU23B |
| 2023-01-01 | $63.27 | $63.27 | RVU23A |
| 2022-10-01 | $64.70 | $64.70 | RVU22D |
| 2022-07-01 | $64.70 | $64.70 | RVU22C |
| 2022-04-01 | $64.70 | $64.70 | RVU22B |
| 2022-01-01 | $64.70 | $64.70 | RVU22A |
| 2021-10-01 | $64.57 | $64.57 | RVU21D |
| 2021-07-01 | $64.57 | $64.57 | RVU21C |
| 2021-04-01 | $64.57 | $64.57 | RVU21B |
| 2021-01-01 | $64.57 | $64.57 | RVU21A |
| 2020-10-01 | $68.07 | $68.07 | RVU20D |
| 2020-07-01 | $68.07 | $68.07 | RVU20C |
| 2020-04-01 | $68.07 | $68.07 | RVU20B |
| 2020-01-01 | $68.07 | $68.07 | RVU20A |
| 2019-10-01 | $68.14 | $68.14 | RVU19D |
| 2019-07-01 | $68.14 | $68.14 | RVU19C |
| 2019-04-01 | $68.14 | $68.14 | RVU19B |
| 2019-01-01 | $68.14 | $68.14 | RVU19A |
| 2018-10-01 | $68.83 | $68.83 | RVU18D |
| 2018-07-01 | $68.83 | $68.83 | RVU18C |
| 2018-04-01 | $68.83 | $68.83 | RVU18B |
| 2018-01-01 | $68.83 | $68.83 | RVU18AR1 |
| 2017-10-01 | $77.75 | $77.75 | RVU17D |
| 2017-07-01 | $77.75 | $77.75 | RVU17C |
| 2017-04-01 | $77.75 | $77.75 | RVU17B |
| 2017-01-01 | $77.75 | $77.75 | RVU17A |
| 2016-10-01 | $95.20 | $95.20 | RVU16D |
| 2016-07-01 | $95.20 | $95.20 | RVU16C |
| 2016-04-01 | $95.20 | $95.20 | RVU16B |
| 2016-01-01 | $95.20 | $95.20 | RVU16A |
| 2015-10-01 | $94.41 | $94.41 | RVU15D |
| 2015-07-01 | $94.41 | $94.41 | RVU15C |
| 2015-04-01 | $93.94 | $93.94 | RVU15B |
| 2015-01-01 | $93.94 | $93.94 | RVU15A |
| 2014-10-01 | $92.77 | $92.77 | RVU14D |
| 2014-07-01 | $92.77 | $92.77 | RVU14C |
| 2014-04-01 | $92.77 | $92.77 | RVU14B |
| 2014-01-01 | $92.77 | $92.77 | RVU14A |
| 2013-10-01 | Rate data unavailable | Rate data unavailable | RVU13D |
| 2013-07-01 | Rate data unavailable | Rate data unavailable | RVU13C |
| 2013-04-01 | Rate data unavailable | Rate data unavailable | RVU13B |
| 2013-01-01 | Rate data unavailable | Rate data unavailable | RVU13AR |
Where the Rhode Island rate applies
Rhode Island is a Medicare payment area, not a city. Our Census mapping connects it to 36 cities and communities in Rhode Island. Some span more than one payment area; confirm with the service ZIP.
- Ashaway
- Bradford
- Carolina
- Central Falls
- Charlestown
- Chepachet
- Clayville
- Cranston
88188 billing questions
How is 88188 selected over 88187 or 88189?
Choose 88188 when the interpretation covers 9–15 markers. The neighboring interpretation codes represent 2–8 markers and 16 or more markers, respectively.
Does 88188 include specimen processing and flow analysis?
No. It covers the professional interpretation and report; separate codes represent the technical flow cytometry work.
Should modifier 26 be appended?
No. 88188 is a professional-component-only code for interpretation and reporting.
Is 88188 reported once per marker?
No. Select the interpretation code based on the total marker count; 88188 represents a 9–15-marker analysis, not an individual marker.
What documentation supports reporting 88188?
Document the specimen, the markers assessed, the interpreted findings, and the report. The documentation should support that the interpreted panel falls within the 9–15-marker range.
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
Fee sheets · Coming soon
Put 88188 and the rest of your codes on one sheet
Your codes at your locality, with payer contracts beside Medicare.
Join the waitlist