CPT code 88360: Tumor IHC scoring, manual quantitative, per antibody2026 Medicare rate & RVUs in Puerto Rico

Manual quantitative or semiquantitative scoring of a tumor immunohistochemical stain, such as ER, PR, HER2, or Ki-67, reported per specimen and single-antibody stain procedure.

CMS RVU26DEffective Oct 1, 2026One payment locality729.1K Medicare services in 2024

In Puerto Rico, Medicare pays $121.24 for 88360 in the office.

$121.24Office (non-facility)
Not available in this settingHospital or facility
+0.8%vs the national office rate ($120.24)

Check a contract rate as a % of Medicare · 88360 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 88360 for the payment locality that covers the ZIP.

On this page 11 sections
  1. Rate in Puerto Rico
  2. What 88360 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 88360 covers

This service includes immunohistochemical staining of tumor tissue and a pathologist's manual quantitative or semiquantitative assessment, rather than a qualitative interpretation alone. Common uses in breast carcinoma include estrogen and progesterone receptor scoring, HER2 membrane scoring on a 0 to 3+ scale, and the Ki-67 proliferation index. Hospital and independent pathology laboratories perform the staining; a pathologist assesses the stained cells at the microscope on a biopsy or resection specimen.

Report one unit for each single-antibody stain procedure scored manually on each separately evaluated specimen. If computer-assisted image analysis performs the quantitation, report 88361 instead. Do not add a qualitative IHC code for the same antibody stain procedure; qualitative stains using other antibodies may be reported separately when supported. Documentation should identify the specimen, antibody, manual scoring method, and result. CMS prices professional and technical components separately: modifier 26 identifies the pathologist's interpretation, modifier TC identifies the staining and other technical work, and the unmodified code represents both components when furnished by one billing entity.

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 Puerto Rico compares for 88360

Across 109 of 109 payment localities, the office rate for 88360 runs from $106.97 in Arkansas to $163.58 in San Benito County, CA. Puerto Rico pays $121.24. The RVUs are the same everywhere; the geographic indexes change the dollars.

88360 in Puerto Rico vs other payment areas
  1. Puerto Rico · this page$121.24
  2. Los Angeles, CA · California$137.96+$16.72
  3. Washington, DC area · District of Columbia$138.17+$16.93
  4. Miami, FL · Florida$125.03+$3.79
  5. Chicago, IL · Illinois$121.76+$0.52
  6. Manhattan, NY · New York$137.29+$16.05
  7. Alaska · Alaska$139.78+$18.54

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

Every other payment area

88360 in every other Medicare payment locality
Payment localityOfficeFacility
AlabamaAlabama$108.47—
ArkansasArkansas$106.97—
ArizonaArizona$117.30—
Bakersfield, CACalifornia$129.33—
Chico, CACalifornia$129.22—
El Centro, CACalifornia$129.23—
Fresno, CACalifornia$129.22—
Hanford, CACalifornia$129.22—

88360 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.

$106.97

$146.40

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

View every state and territory as a table
88360 office rate range by state
State / territoryOffice rate rangeLocalities
AK$139.781
AL$108.471
AR$106.971
AZ$117.301
CA$129.22–$163.5829
CO$126.311
CT$128.011
DC$138.171
DE$119.211
FL$116.54–$125.033
GA$110.45–$121.932
GU$132.551
HI$132.551
IA$112.031
ID$112.541
IL$112.63–$123.434
IN$113.191
KS$111.091
KY$109.991
LA$109.65–$114.912
MA$125.42–$139.132
MD$121.57–$138.173
ME$112.64–$119.172
MI$112.34–$117.492
MN$122.441
MO$107.55–$115.843
MS$107.301
MT$120.241
NC$113.851
ND$119.851
NE$112.761
NH$123.931
NJ$129.87–$136.732
NM$112.751
NV$120.221
NY$115.45–$139.955
OH$112.261
OK$110.271
OR$119.68–$130.712
PA$112.67–$124.642
PR$121.241
RI$123.731
SC$113.161
SD$119.801
TN$111.581
TX$111.93–$125.558
UT$114.661
VA$118.49–$138.172
VI$121.241
VT$118.991
WA$125.31–$142.362
WI$115.921
WV$108.501
WY$120.071

See 88360 in every payment locality

How the 88360 rate is calculated

Each of 88360’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 · 88360

RVUs × geographic indexes × conversion factor

Office or facility?

Work0.83

0.83 RVUs× 1.000 GPCI

Practice expense2.75

2.75 RVUs× 1.000 GPCI

Malpractice0.02

0.02 RVUs× 1.000 GPCI

Adjusted RVUs

3.6000

Conversion factor

$33.4009

Medicare rate

$120.24

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

The exact Puerto Rico inputs and CMS source lines

PPRRVU2026_Oct_nonQPP.csv

11,275

Code
88360
Physician work
0.83
Practice expense
2.75
Malpractice
0.02

GPCI2026.csv

91

Locality
Puerto Rico
Physician work
1.000
Practice expense
1.011
Malpractice
0.985
Office calculation for 88360 in Puerto Rico
ComponentRVULocality factorAdjusted
Physician work0.83× 1.0000.8300
Practice expense2.75× 1.0112.7802
Malpractice0.02× 0.9850.0197
Total RVUs3.6299
Conversion factor× 33.4009

Office rate, Puerto Rico$121.24

Office: (0.83 × 1 + 2.75 × 1.011 + 0.02 × 0.985) × $33.4009 = $121.24

Open 88360 in the RVU calculator

Payment rules and modifiers for 88360

The CMS indicators that decide how 88360 is paid alongside other services.

CMS payment indicators · 88360

Tumor IHC scoring, manual quantitative, per antibody

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/technical1Diagnostic test with separate professional (26) and technical (TC) components.

What modifiers do to the payment

Modifier 26 · payment effect

With and without the modifier

88360 without 26 · national office

$120.24

Tumor IHC scoring, manual quantitative, per antibody

88360-26 · Professional component

$39.08

Pays only the interpretation and report.

When to use modifier 26

How 88360 has changed in Puerto Rico

88360 · Office / nonfacility

$121.24

Effective 2026-10-01

The base rate is $5.16 higher than on 2025-10-01, moving from $116.08 to $121.24 (4.4%).

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

    $116.08changed to$121.24

    • Conversion factor 32.3465 changed to 33.4009
    • Work RVU 0.85 changed to 0.83
    • Practice expense RVU 2.70 changed to 2.75
    • Practice expense GPCI 1.007 changed to 1.011
    • Malpractice GPCI 0.982 changed to 0.985

    Held through RVU26B, RVU26C, RVU26D.

  2. January 1, 2025

    RVU25A

    $120.79changed to$116.08

    • Conversion factor 33.2875 changed to 32.3465
    • Practice expense RVU 2.74 changed to 2.70

    Held through RVU25B, RVU25C, RVU25D.

  3. March 9, 2024

    RVU24AR

    $118.82changed to$120.79

    • Conversion factor 32.7442 changed to 33.2875

    Held through RVU24B, RVU24C, RVU24D.

  4. January 1, 2024

    RVU24A

    $119.99changed to$118.82

    • Conversion factor 33.8872 changed to 32.7442
    • Practice expense RVU 2.65 changed to 2.74
    • Practice expense GPCI 1.008 changed to 1.007
    • Malpractice GPCI 0.984 changed to 0.982
  5. October 1, 2023

    RVU23D

    $119.28changed to$119.99

    • Practice expense GPCI 1.000 changed to 1.008
    • Malpractice GPCI 1.000 changed to 0.984
  6. January 1, 2023

    RVU23A

    $123.24changed to$119.28

    • Conversion factor 34.6062 changed to 33.8872
    • Practice expense RVU 2.67 changed to 2.65
    • Practice expense GPCI 1.008 changed to 1.000
    • Malpractice GPCI 0.986 changed to 1.000

    Held through RVU23B, RVU23C.

  7. January 1, 2022

    RVU22A

    $125.66changed to$123.24

    • Conversion factor 34.8931 changed to 34.6062
    • Practice expense RVU 2.71 changed to 2.67

    Held through RVU22B, RVU22C, RVU22D.

  8. January 1, 2021

    RVU21A

    $128.16changed to$125.66

    • Conversion factor 36.0896 changed to 34.8931
    • Practice expense RVU 2.66 changed to 2.71
    • Malpractice GPCI 0.988 changed to 0.986

    Held through RVU21B, RVU21C, RVU21D.

  9. January 1, 2020

    RVU20A

    $130.42changed to$128.16

    • Conversion factor 36.0391 changed to 36.0896
    • Practice expense RVU 2.72 changed to 2.66
    • Malpractice RVU 0.03 changed to 0.02
    • Practice expense GPCI 1.007 changed to 1.008
    • Malpractice GPCI 0.990 changed to 0.988

    Held through RVU20B, RVU20C, RVU20D.

  10. January 1, 2019

    RVU19A

    $137.16changed to$130.42

    • Conversion factor 35.9996 changed to 36.0391
    • Practice expense RVU 2.91 changed to 2.72

    Held through RVU19B, RVU19C, RVU19D.

  11. January 1, 2018

    RVU18AR1

    $127.11changed to$137.16

    • Conversion factor 35.8887 changed to 35.9996
    • Work RVU 1.10 changed to 0.85
    • Practice expense RVU 2.83 changed to 2.91
    • Practice expense GPCI 0.856 changed to 1.007
    • Malpractice GPCI 0.642 changed to 0.990

    Held through RVU18B, RVU18C, RVU18D.

  12. January 1, 2017

    RVU17A

    $97.00changed to$127.11

    • Conversion factor 35.8043 changed to 35.8887
    • Practice expense RVU 2.27 changed to 2.83
    • Practice expense GPCI 0.705 changed to 0.856
    • Malpractice GPCI 0.293 changed to 0.642

    Held through RVU17B, RVU17C, RVU17D.

  13. January 1, 2016

    RVU16A

    $107.63changed to$97.00

    • Conversion factor 35.9335 changed to 35.8043
    • Practice expense RVU 2.68 changed to 2.27
    • Malpractice RVU 0.02 changed to 0.03

    Held through RVU16B, RVU16C, RVU16D.

  14. July 1, 2015

    RVU15C

    $107.09changed to$107.63

    • Conversion factor 35.7547 changed to 35.9335

    Held through RVU15D.

  15. January 1, 2015

    RVU15A

    $101.52changed to$107.09

    • Conversion factor 35.8228 changed to 35.7547
    • Practice expense RVU 2.49 changed to 2.68
    • Malpractice RVU 0.04 changed to 0.02
    • Practice expense GPCI 0.692 changed to 0.705
    • Malpractice GPCI 0.271 changed to 0.293

    Held through RVU15B.

  16. January 1, 2014

    RVU14A

    $97.74changed to$101.52

    • Conversion factor 34.0230 changed to 35.8228
    • Practice expense RVU 2.60 changed to 2.49
    • Practice expense GPCI 0.678 changed to 0.692
    • Malpractice GPCI 0.249 changed to 0.271

    Held through RVU14B, RVU14C, RVU14D.

  17. January 1, 2013

    RVU13AR

    Earliest loaded release: $97.74

    Held through RVU13B, RVU13C, RVU13D.

Rates in every CMS release
Effective fromOfficeFacilityCMS release
2026-10-01$121.24Not available in this settingRVU26D
2026-07-01$121.24Not available in this settingRVU26C
2026-04-01$121.24Not available in this settingRVU26B
2026-01-01$121.24Not available in this settingRVU26A
2025-10-01$116.08Not available in this settingRVU25D
2025-07-01$116.08Not available in this settingRVU25C
2025-04-01$116.08Not available in this settingRVU25B
2025-01-01$116.08Not available in this settingRVU25A
2024-10-01$120.79Not available in this settingRVU24D
2024-07-01$120.79Not available in this settingRVU24C
2024-04-01$120.79Not available in this settingRVU24B
2024-03-09$120.79Not available in this settingRVU24AR
2024-01-01$118.82Not available in this settingRVU24A
2023-10-01$119.99Not available in this settingRVU23D
2023-07-01$119.28Not available in this settingRVU23C
2023-04-01$119.28Not available in this settingRVU23B
2023-01-01$119.28Not available in this settingRVU23A
2022-10-01$123.24Not available in this settingRVU22D
2022-07-01$123.24Not available in this settingRVU22C
2022-04-01$123.24Not available in this settingRVU22B
2022-01-01$123.24Not available in this settingRVU22A
2021-10-01$125.66Not available in this settingRVU21D
2021-07-01$125.66Not available in this settingRVU21C
2021-04-01$125.66Not available in this settingRVU21B
2021-01-01$125.66Not available in this settingRVU21A
2020-10-01$128.16Not available in this settingRVU20D
2020-07-01$128.16Not available in this settingRVU20C
2020-04-01$128.16Not available in this settingRVU20B
2020-01-01$128.16Not available in this settingRVU20A
2019-10-01$130.42Not available in this settingRVU19D
2019-07-01$130.42Not available in this settingRVU19C
2019-04-01$130.42Not available in this settingRVU19B
2019-01-01$130.42Not available in this settingRVU19A
2018-10-01$137.16Not available in this settingRVU18D
2018-07-01$137.16Not available in this settingRVU18C
2018-04-01$137.16Not available in this settingRVU18B
2018-01-01$137.16Not available in this settingRVU18AR1
2017-10-01$127.11Not available in this settingRVU17D
2017-07-01$127.11Not available in this settingRVU17C
2017-04-01$127.11Not available in this settingRVU17B
2017-01-01$127.11Not available in this settingRVU17A
2016-10-01$97.00Not available in this settingRVU16D
2016-07-01$97.00Not available in this settingRVU16C
2016-04-01$97.00Not available in this settingRVU16B
2016-01-01$97.00Not available in this settingRVU16A
2015-10-01$107.63Not available in this settingRVU15D
2015-07-01$107.63Not available in this settingRVU15C
2015-04-01$107.09Not available in this settingRVU15B
2015-01-01$107.09Not available in this settingRVU15A
2014-10-01$101.52Not available in this settingRVU14D
2014-07-01$101.52Not available in this settingRVU14C
2014-04-01$101.52Not available in this settingRVU14B
2014-01-01$101.52Not available in this settingRVU14A
2013-10-01$97.74Not available in this settingRVU13D
2013-07-01$97.74Not available in this settingRVU13C
2013-04-01$97.74Not available in this settingRVU13B
2013-01-01$97.74Not available in this settingRVU13AR

Price 88360 for an earlier date of service

Where the Puerto Rico rate applies

Puerto Rico is a Medicare payment area, not a city. Our Census mapping connects it to 292 cities and communities in Puerto Rico. Some span more than one payment area; confirm with the service ZIP.

  • Aceitunas
  • Adjuntas
  • Aguada
  • Aguadilla
  • Aguas Buenas
  • Aguas Claras
  • Aguilita
  • Aibonito

Browse all communities in Puerto Rico

88360 billing questions

When is 88360 reported instead of 88342?

Use 88360 for documented manual quantitative or semiquantitative tumor IHC assessment, such as an ER percentage or HER2 0 to 3+ score. Use 88342 for the first single-antibody IHC stain procedure on a specimen when the work is a qualitative assessment.

How many units are reported for an ER, PR, and HER2 panel on one breast biopsy?

Report three units if each single-antibody stain procedure is manually scored on that specimen. Count a second separately evaluated specimen separately when those stains are also performed and scored on it.

Can 88342 or 88341 be billed with 88360 for the same antibody?

Do not add a qualitative IHC code for the same antibody stain procedure on the same specimen. Qualitative stains for different antibodies may be reported separately when supported.

What if image analysis software is used to score the stain?

Report 88361 instead of 88360 when computer-assisted image analysis performs the quantitative or semiquantitative assessment. Do not report both for the same stain procedure on the same specimen.

Which modifier does a hospital-based pathologist use?

When the hospital performs the technical work and the pathologist bills only for interpretation, the pathologist reports 88360 with modifier 26. Modifier TC identifies a separately billed technical component; an entity furnishing and billing both components reports the global service without either modifier.

What documentation supports 88360?

The report should identify the specimen and antibody, document manual quantitative or semiquantitative assessment, and give the score or measured result, such as the percentage of positive tumor nuclei.

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 88360PPRRVU2026_Oct_nonQPP.csv, line 11,275 (RVU26D)
Geographic factors for Puerto RicoGPCI2026.csv, line 91 (RVU26D)

Open CMS sourceHow we calculate rates

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