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CPT code 88187: Flow cytometry, 2–8 marker interpretation2026 Medicare rate & RVUs in Iowa

Report 88187 for the professional interpretation and written report of a flow-cytometry study evaluating 2 through 8 markers.

CMS RVU26DEffective Oct 1, 2026One payment locality23.3K Medicare services in 2024

In Iowa, Medicare pays $33.61 for 88187 in the office and $33.61 when it’s performed in a hospital or facility.

$33.61Office (non-facility)
$33.61Hospital or facility
−4.2%vs the national office rate ($35.07)

Check a contract rate as a % of Medicare · 88187 nationwide

Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.

We’ll open 88187 for the payment locality that covers the ZIP.

On this page 11 sections
  1. Rate in Iowa
  2. What 88187 covers
  3. Compared with other areas
  4. Rate map
  5. How it’s calculated
  6. Payment rules
  7. Related codes
  8. Rate history
  9. Where it applies
  10. Billing questions
  11. Sources

What 88187 covers

Code 88187 represents the professional interpretation and written report of a flow-cytometry study evaluating 2 through 8 markers. Hematopathologists commonly perform this work to characterize abnormal cell populations in peripheral blood, bone marrow, lymph-node specimens, or body-cavity fluids when evaluating suspected leukemia, lymphoma, or another hematologic disorder. The service is the analysis and report, not specimen collection or instrument acquisition.

Select the code level based on the number of markers evaluated in the interpretation: 2 through 8 for 88187. The report should identify the specimen, describe the flow-cytometry findings, and support the interpretation and marker count. CMS identifies 88187 as professional-component-only; the technical portion is reported separately using the applicable technical code or codes, such as 88184 for the first marker and 88185 for additional markers.

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 Iowa compares for 88187

Across 109 of 109 payment localities, the office rate for 88187 runs from $33.17 in Arkansas to $47.30 in Alaska. Iowa pays $33.61. The RVUs are the same everywhere; the geographic indexes change the dollars.

88187 in Iowa vs other payment areas
  1. Iowa · this page$33.61
  2. Los Angeles, CA · California$37.55+$3.94
  3. Washington, DC area · District of Columbia$38.27+$4.66
  4. Miami, FL · Florida$37.01+$3.40
  5. Chicago, IL · Illinois$36.59+$2.98
  6. Manhattan, NY · New York$38.82+$5.21
  7. Alaska · Alaska$47.30+$13.69

Other areas in Iowa first, then benchmark localities. Bars start at $0.

Every other payment area

88187 in every other Medicare payment locality
Payment localityOfficeFacility
AlabamaAlabama$33.38$33.38
ArkansasArkansas$33.17$33.17
ArizonaArizona$34.62$34.62
Bakersfield, CACalifornia$36.10$36.10
Chico, CACalifornia$35.98$35.98
El Centro, CACalifornia$35.98$35.98
Fresno, CACalifornia$35.98$35.98
Hanford, CACalifornia$35.98$35.98

88187 rates by state

Office rate range in each state. Select a state to see its payment localities.

MEWIVTNHMTNDMNMINYMARIWAIDWYSDIAILINOHPANJCTORNVUTCONEMOKYWVVAMDDECAAZNMKSOKARTNNCSCDCTXLAMSALGAFLAKHI

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.

$33.17

$47.30

Color shows the midpoint of each state’s locality range.

View every state and territory as a table
88187 office rate range by state
State / territoryOffice rate rangeLocalities
AK$47.301
AL$33.381
AR$33.171
AZ$34.621
CA$35.98–$41.6829
CO$35.781
CT$36.531
DC$38.271
DE$34.971
FL$35.13–$37.013
GA$34.18–$35.502
GU$36.021
HI$36.021
IA$33.611
ID$33.741
IL$34.76–$36.594
IN$33.821
KS$33.611
KY$33.871
LA$33.88–$34.622
MA$35.78–$37.892
MD$35.35–$38.273
ME$33.89–$34.612
MI$34.33–$35.412
MN$34.661
MO$33.66–$34.593
MS$33.421
MT$35.071
NC$34.041
ND$34.481
NE$33.681
NH$35.361
NJ$37.05–$38.262
NM$34.441
NV$34.911
NY$34.27–$39.365
OH$34.211
OK$33.781
OR$34.73–$36.312
PA$34.19–$36.112
PR$35.171
RI$35.751
SC$34.161
SD$34.411
TN$33.701
TX$34.10–$35.598
UT$34.371
VA$34.61–$38.272
VI$35.171
VT$34.481
WA$35.68–$38.362
WI$33.961
WV$34.191
WY$34.811

See 88187 in every payment locality

How the 88187 rate is calculated

Each of 88187’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 · 88187

RVUs × geographic indexes × conversion factor

Office or facility?

Work0.72

0.72 RVUs× 1.000 GPCI

Practice expense0.30

0.30 RVUs× 1.000 GPCI

Malpractice0.03

0.03 RVUs× 1.000 GPCI

Adjusted RVUs

1.0500

Conversion factor

$33.4009

Medicare rate

$35.07

Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.

The exact Iowa inputs and CMS source lines

PPRRVU2026_Oct_nonQPP.csv

11,164

Code
88187
Physician work
0.72
Practice expense
0.30
Malpractice
0.03

GPCI2026.csv

53

Locality
Iowa
Physician work
1.000
Practice expense
0.915
Malpractice
0.397
Office calculation for 88187 in Iowa
ComponentRVULocality factorAdjusted
Physician work0.72× 1.0000.7200
Practice expense0.30× 0.9150.2745
Malpractice0.03× 0.3970.0119
Total RVUs1.0064
Conversion factor× 33.4009

Office rate, Iowa$33.61

Office: (0.72 × 1 + 0.3 × 0.915 + 0.03 × 0.397) × $33.4009 = $33.61

Facility: (0.72 × 1 + 0.3 × 0.915 + 0.03 × 0.397) × $33.4009 = $33.61

Open 88187 in the RVU calculator

Payment rules and modifiers for 88187

The CMS indicators that decide how 88187 is paid alongside other services.

CMS payment indicators · 88187

Flow cytometry, 2–8 marker interpretation

RuleCMS valueWhat it means
Global periodXXXThe global surgery concept doesn’t apply.
Multiple procedures0No multiple-procedure reduction.
Bilateral (modifier 50)0The 150% bilateral adjustment doesn’t apply.
Assistant at surgery (80/81/82/AS)0Not paid without supporting documentation.
Co-surgeons (62)0Not permitted.
Team surgery (66)0Not permitted.
Professional/technical2Professional component only.

Codes related to 88187

Related codes aren’t interchangeable: bill the code that matches the service performed.

Codes related to 88187
CodeHow it relatesOffice range, Iowa
Often billed with
88184Flow cytometry, first marker, technical componentTechnical portion for the first marker, commonly reported with the professional interpretation.$73.92
88185Flow cytometry add-on, technical work, each additional markerTechnical portion for additional markers, reported as applicable with the professional interpretation.$21.09
Same family
88188Flow cytometry, 9–15 markersProfessional interpretation level for studies evaluating 9 through 15 markers.$55.77
88189Flow cytometry, 16 or more markersProfessional interpretation level for studies evaluating 16 or more markers.$75.93

How 88187 has changed in Iowa

88187 · Office / nonfacility

$33.61

Effective 2026-10-01

The base rate is $0.67 higher than on 2025-10-01, moving from $32.94 to $33.61 (2.0%).

It is unchanged from the immediately preceding available release, effective 2026-07-01.

Base rate by release · bars start at $0 · select a bar to compare

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

  1. January 1, 2026

    RVU26A

    $32.94changed to$33.61

    • Conversion factor 32.3465 changed to 33.4009
    • Work RVU 0.74 changed to 0.72
    • Practice expense RVU 0.29 changed to 0.30
    • Practice expense GPCI 0.913 changed to 0.915
    • Malpractice GPCI 0.457 changed to 0.397

    Held through RVU26B, RVU26C, RVU26D.

  2. January 1, 2025

    RVU25A

    $33.60changed to$32.94

    • Conversion factor 33.2875 changed to 32.3465
    • Practice expense RVU 0.28 changed to 0.29

    Held through RVU25B, RVU25C, RVU25D.

  3. March 9, 2024

    RVU24AR

    $33.05changed to$33.60

    • Conversion factor 32.7442 changed to 33.2875

    Held through RVU24B, RVU24C, RVU24D.

  4. January 1, 2024

    RVU24A

    $33.69changed to$33.05

    • Conversion factor 33.8872 changed to 32.7442
    • Practice expense RVU 0.26 changed to 0.28
    • Malpractice RVU 0.04 changed to 0.03
    • Practice expense GPCI 0.910 changed to 0.913
    • Malpractice GPCI 0.441 changed to 0.457

  5. January 1, 2023

    RVU23A

    $34.36changed to$33.69

    • Conversion factor 34.6062 changed to 33.8872
    • Practice expense GPCI 0.907 changed to 0.910
    • Malpractice GPCI 0.425 changed to 0.441

    Held through RVU23B, RVU23C, RVU23D.

  6. January 1, 2022

    RVU22A

    $34.96changed to$34.36

    • Conversion factor 34.8931 changed to 34.6062
    • Practice expense RVU 0.27 changed to 0.26

    Held through RVU22B, RVU22C, RVU22D.

  7. January 1, 2021

    RVU21A

    $37.29changed to$34.96

    • Conversion factor 36.0896 changed to 34.8931
    • Practice expense RVU 0.30 changed to 0.27
    • Malpractice RVU 0.05 changed to 0.04
    • Malpractice GPCI 0.424 changed to 0.425

    Held through RVU21B, RVU21C, RVU21D.

  8. January 1, 2020

    RVU20A

    $37.26changed to$37.29

    • Conversion factor 36.0391 changed to 36.0896
    • Practice expense RVU 0.31 changed to 0.30
    • Malpractice RVU 0.03 changed to 0.05
    • Malpractice GPCI 0.423 changed to 0.424

    Held through RVU20B, RVU20C, RVU20D.

  9. January 1, 2019

    RVU19A

    $45.53changed to$37.26

    • Conversion factor 35.9996 changed to 36.0391
    • Practice expense RVU 0.56 changed to 0.31
    • Malpractice RVU 0.04 changed to 0.03

    Held through RVU19B, RVU19C, RVU19D.

  10. January 1, 2018

    RVU18AR1

    $55.38changed to$45.53

    • Conversion factor 35.8887 changed to 35.9996
    • Practice expense RVU 0.87 changed to 0.56
    • Practice expense GPCI 0.902 changed to 0.907
    • Malpractice GPCI 0.458 changed to 0.423

    Held through RVU18B, RVU18C, RVU18D.

  11. January 1, 2017

    RVU17A

    $69.50changed to$55.38

    • Conversion factor 35.8043 changed to 35.8887
    • Work RVU 1.36 changed to 0.74
    • Practice expense RVU 0.61 changed to 0.87
    • Malpractice RVU 0.07 changed to 0.04
    • Practice expense GPCI 0.896 changed to 0.902
    • Malpractice GPCI 0.493 changed to 0.458

    Held through RVU17B, RVU17C, RVU17D.

  12. January 1, 2016

    RVU16A

    $69.25changed to$69.50

    • Conversion factor 35.9335 changed to 35.8043
    • Practice expense RVU 0.60 changed to 0.61
    • Malpractice RVU 0.06 changed to 0.07

    Held through RVU16B, RVU16C, RVU16D.

  13. July 1, 2015

    RVU15C

    $68.91changed to$69.25

    • Conversion factor 35.7547 changed to 35.9335

    Held through RVU15D.

  14. January 1, 2015

    RVU15A

    $67.97changed to$68.91

    • Conversion factor 35.8228 changed to 35.7547
    • Practice expense RVU 0.56 changed to 0.60
    • Malpractice RVU 0.08 changed to 0.06
    • Practice expense GPCI 0.892 changed to 0.896
    • Malpractice GPCI 0.475 changed to 0.493

    Held through RVU15B.

  15. January 1, 2014

    RVU14A

    $65.02changed to$67.97

    • Conversion factor 34.0230 changed to 35.8228
    • Practice expense RVU 0.58 changed to 0.56
    • Practice expense GPCI 0.887 changed to 0.892
    • Malpractice GPCI 0.456 changed to 0.475

    Held through RVU14B, RVU14C, RVU14D.

  16. January 1, 2013

    RVU13AR

    Earliest loaded release: $65.02

    Held through RVU13B, RVU13C, RVU13D.

Rates in every CMS release
Effective fromOfficeFacilityCMS release
2026-10-01$33.61$33.61RVU26D
2026-07-01$33.61$33.61RVU26C
2026-04-01$33.61$33.61RVU26B
2026-01-01$33.61$33.61RVU26A
2025-10-01$32.94$32.94RVU25D
2025-07-01$32.94$32.94RVU25C
2025-04-01$32.94$32.94RVU25B
2025-01-01$32.94$32.94RVU25A
2024-10-01$33.60$33.60RVU24D
2024-07-01$33.60$33.60RVU24C
2024-04-01$33.60$33.60RVU24B
2024-03-09$33.60$33.60RVU24AR
2024-01-01$33.05$33.05RVU24A
2023-10-01$33.69$33.69RVU23D
2023-07-01$33.69$33.69RVU23C
2023-04-01$33.69$33.69RVU23B
2023-01-01$33.69$33.69RVU23A
2022-10-01$34.36$34.36RVU22D
2022-07-01$34.36$34.36RVU22C
2022-04-01$34.36$34.36RVU22B
2022-01-01$34.36$34.36RVU22A
2021-10-01$34.96$34.96RVU21D
2021-07-01$34.96$34.96RVU21C
2021-04-01$34.96$34.96RVU21B
2021-01-01$34.96$34.96RVU21A
2020-10-01$37.29$37.29RVU20D
2020-07-01$37.29$37.29RVU20C
2020-04-01$37.29$37.29RVU20B
2020-01-01$37.29$37.29RVU20A
2019-10-01$37.26$37.26RVU19D
2019-07-01$37.26$37.26RVU19C
2019-04-01$37.26$37.26RVU19B
2019-01-01$37.26$37.26RVU19A
2018-10-01$45.53$45.53RVU18D
2018-07-01$45.53$45.53RVU18C
2018-04-01$45.53$45.53RVU18B
2018-01-01$45.53$45.53RVU18AR1
2017-10-01$55.38$55.38RVU17D
2017-07-01$55.38$55.38RVU17C
2017-04-01$55.38$55.38RVU17B
2017-01-01$55.38$55.38RVU17A
2016-10-01$69.50$69.50RVU16D
2016-07-01$69.50$69.50RVU16C
2016-04-01$69.50$69.50RVU16B
2016-01-01$69.50$69.50RVU16A
2015-10-01$69.25$69.25RVU15D
2015-07-01$69.25$69.25RVU15C
2015-04-01$68.91$68.91RVU15B
2015-01-01$68.91$68.91RVU15A
2014-10-01$67.97$67.97RVU14D
2014-07-01$67.97$67.97RVU14C
2014-04-01$67.97$67.97RVU14B
2014-01-01$67.97$67.97RVU14A
2013-10-01$65.02$65.02RVU13D
2013-07-01$65.02$65.02RVU13C
2013-04-01$65.02$65.02RVU13B
2013-01-01$65.02$65.02RVU13AR

Price 88187 for an earlier date of service

Where the Iowa rate applies

Iowa is a Medicare payment area, not a city. Our Census mapping connects it to 1026 cities and communities in Iowa. Some span more than one payment area; confirm with the service ZIP.

  • Ackley
  • Ackworth
  • Adair
  • Adel
  • Afton
  • Agency
  • Ainsworth
  • Akron

Browse all communities in Iowa

88187 billing questions

How does 88187 differ from 88188?

88187 applies when the interpretation evaluates 2 through 8 markers. Use 88188 for an interpretation involving 9 through 15 markers.

How does 88187 differ from 88189?

88189 is the higher marker-count interpretation level, for 16 or more markers. Choose among these interpretation codes according to the marker count documented for the study.

Does 88187 include the technical flow-cytometry work?

No. 88187 represents the professional interpretation and report; the technical portion is separately coded, typically with 88184 and any applicable units of 88185.

Should modifier 26 be appended to 88187?

CMS identifies 88187 as a professional-component-only code, so the code itself represents the interpretation and report. Do not add modifier 26 solely to identify that component.

What documentation supports reporting 88187?

Document the specimen, markers evaluated, flow-cytometry findings, and the professional interpretation. The record should support that the interpretation falls within the 2-through-8-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
RVUs for 88187PPRRVU2026_Oct_nonQPP.csv, line 11,164 (RVU26D)
Geographic factors for IowaGPCI2026.csv, line 53 (RVU26D)

Open CMS sourceHow we calculate rates

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