$33.82
Both report professional interpretation of flow cytometry; choose 88187 for the lower marker range and 88189 for 16 or more markers.
On this page
CMS RVU26D · Effective 2026-10-01
88189 Flow cytometry Medicare reimbursement rates in Indiana
Reports the professional interpretation of a flow cytometry study using 16 or more markers, commonly for immunophenotyping blood, marrow, tissue, or fluid specimens. Compare 88189 office and facility rates across CMS payment localities in Indiana.
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.
What does Medicare pay for 88189 in Indiana?
Indiana has 1 payment locality in this comparison. Use the service location to choose the applicable amount. These are the supported base rates for the payment area shown below, using the same CMS release.
Office / nonfacility
$76.40
1 of 1 localities have a supported rate.
Payment area: Indiana
One mapped payment locality.
Facility setting
$76.40
1 of 1 localities have a supported rate.
Payment area: Indiana
One mapped payment locality.
These are locality ranges, not averages or address-specific quotes. A facility-setting amount covers the physician service; it does not include a hospital’s separate bill. Choose a locality below to inspect its calculation, compare other payment areas, or price a percentage of Medicare.
Laboratory pathology
About 88189: Flow cytometry interpretation, 16 or more markers
Reports the professional interpretation of a flow cytometry study using 16 or more markers, commonly for immunophenotyping blood, marrow, tissue, or fluid specimens.
A pathologist or other qualified physician interprets flow cytometry findings from a study using 16 or more markers and prepares the interpretive report. These studies commonly support evaluation of suspected hematologic malignancies, such as leukemia or lymphoma, using specimens such as peripheral blood, bone marrow, lymph node tissue, or body fluids. The interpretation assesses the marker findings as a whole rather than billing for the laboratory work that processes and analyzes the specimen.
Select this level according to the number of markers in the study: 88189 is for 16 or more, while 88187 and 88188 cover lower marker ranges. The record should support the marker count and include the signed interpretation and report. This is a professional-component-only code; separate code or codes cover the technical portion. The technical services may include 88184 for the first marker and 88185 for additional markers, as appropriate.
CMS billing rules for 88189
- Professional and technical components
- Professional-component-only code: interpretation and report; a separate code covers the technical portion.
Where the value comes from
- Work RVU1.66 · 70%
- Practice expense (office) RVU0.64 · 27%
- Malpractice RVU0.07 · 3%
265.5K
Medicare services in 2024 · #334 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.
88189 compared with similar codes
Office rates for Indiana, from the same CMS release.
$56.15
88188 applies to 9 through 15 markers. Use 88189 when the study reaches 16 markers or more.
$74.94
88184 represents technical work for the first marker, not the physician's interpretation and report represented by 88189.
$21.36
88185 represents technical work for additional markers. It does not replace the professional interpretation code when that work is performed.
Compare 88189 by payment locality
Find the payment area for your service address, then open its rate page for calculation inputs, release history and the percentage-of-Medicare tool. A city may cross payment-area boundaries; the ZIP lookup above helps resolve the location.
1 of 1 payment localities
Indiana →
Office / nonfacility
$76.40
Facility
$76.40
Need rates for a whole code list?
Fee-sheet and API access are in early access. Tell us which codes and locations your team needs.
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 88189 in Indiana.
PPRRVU2026_Oct_nonQPP.csv
11,166
- Code
- 88189
- Physician work
- 1.66
- Practice expense
- 0.64
- Malpractice
- 0.07
GPCI2026.csv
52
- Locality
- Indiana
- Physician work
- 1.000
- Practice expense
- 0.927
- Malpractice
- 0.486
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 1.66 | × 1.000 | 1.6600 |
| Practice expense | 0.64 | × 0.927 | 0.5933 |
| Malpractice | 0.07 | × 0.486 | 0.0340 |
| Total RVUs | 2.2873 | ||
| Conversion factor | × 33.4009 | ||
Office / nonfacility rate, Indiana$76.40
Explore RVUs, geographic factors and the full formula
Office / nonfacility
| Component | RVU | Local GPCI |
|---|---|---|
| Work | 1.66 | 1 |
| Practice expense | 0.64 | 0.927 |
| Malpractice | 0.07 | 0.486 |
(1.66 × 1 + 0.64 × 0.927 + 0.07 × 0.486) × $33.4009 = $76.40
Facility
| Component | RVU | Local GPCI |
|---|---|---|
| Work | 1.66 | 1 |
| Practice expense | 0.64 | 0.927 |
| Malpractice | 0.07 | 0.486 |
(1.66 × 1 + 0.64 × 0.927 + 0.07 × 0.486) × $33.4009 = $76.40
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.
88189 billing questions
When should 88189 be selected instead of 88188?
Use 88189 when the flow cytometry study includes 16 or more markers. Code 88188 is for the lower range of 9 through 15 markers.
Does 88189 include the laboratory's technical work?
No. It represents the professional interpretation and report; separate code or codes cover the technical portion.
Which codes may represent the technical portion?
Code 88184 covers the technical work for the first marker, and 88185 covers additional markers, as appropriate to the study.
What documentation supports reporting 88189?
Keep the flow cytometry report, the marker count supporting the 16-or-more level, and the signed professional interpretation.
Should modifier 26 be appended to 88189?
No. 88189 is already a professional-component-only 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 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.
11,16388185,,Flowcytometry/tc add-on,A,,0.00,0.69,,0.69,NA,0.00,0.69,0.69,3,ZZZ,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
11,16488187,,Flowcytometry/read 2-8,A,,0.72,0.30,,0.30,,0.03,1.05,1.05,2,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
11,16588188,,Flowcytometry/read 9-15,A,,1.17,0.52,,0.52,,0.06,1.75,1.75,2,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
11,16688189,,Flowcytometry/read 16 & >,A,,1.66,0.64,,0.64,,0.07,2.37,2.37,2,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
11,16788199,,Unlisted cytopathology px,C,,0.00,0.00,,0.00,NA,0.00,0.00,0.00,1,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
11,16888199,26,Unlisted cytopathology px,C,,0.00,0.00,,0.00,,0.00,0.00,0.00,1,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
11,16988199,TC,Unlisted cytopathology px,C,,0.00,0.00,,0.00,NA,0.00,0.00,0.00,1,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
4906102,IL,12,EAST ST. LOUIS,1.000,0.920,2.014
5006102,IL,15,SUBURBAN CHICAGO,1.007,1.027,1.772
5106102,IL,99,REST OF ILLINOIS,1.000,0.913,1.563
5208102,IN,00,INDIANA,1.000,0.927,0.486
5305102,IA,00,IOWA,1.000,0.915,0.397
5405202,KS,00,KANSAS,1.000,0.904,0.504
5515102,KY,00,KENTUCKY,1.000,0.889,0.915