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CPT code 43757: Duodenal aspiration, multiple specimens2026 Medicare rate & RVUs in Metropolitan Boston, MA

Reports diagnostic collection of multiple aspirate specimens from the duodenum by intubation, such as sampling contents for laboratory analysis.

CMS RVU26DEffective Oct 1, 2026One payment locality31 Medicare services in 2024

In Metropolitan Boston, MA, Medicare pays $479.24 for 43757 in the office and $76.04 when it’s performed in a hospital or facility.

$479.24Office (non-facility)
$76.04Hospital or facility
+17.5%vs the national office rate ($407.82)

Check a contract rate as a % of Medicare · 43757 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 43757 for the payment locality that covers the ZIP.

On this page 11 sections
  1. Rate in Metropolitan Boston, MA
  2. What 43757 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 43757 covers

A clinician advances an intubation tube into the duodenum and collects multiple aspirate specimens for diagnostic testing. Gastroenterologists and other physicians performing gastrointestinal diagnostic procedures may use this service when duodenal contents need laboratory assessment, including evaluation for suspected small-intestinal bacterial overgrowth. The service involves aspiration of duodenal contents rather than tissue sampling by biopsy.

Select this code when the documented procedure collects multiple diagnostic specimens from the duodenum; a single-specimen collection is represented by 43756. The record should identify the duodenal sampling site, diagnostic purpose, and collection of multiple specimens. CMS assigns a 0-day global period, so same-day preoperative and postoperative care is included. An assistant at surgery may be paid; co-surgeons and team surgery are not permitted. Modifier 50 is inappropriate for this service.

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 Metropolitan Boston, MA compares for 43757

Across 109 of 109 payment localities, the office rate for 43757 runs from $354.51 in Arkansas to $570.21 in San Benito County, CA. Metropolitan Boston, MA pays $479.24. The RVUs are the same everywhere; the geographic indexes change the dollars.

43757 in Metropolitan Boston, MA vs other payment areas
  1. Metropolitan Boston, MA · this page$479.24
  2. Rest of Massachusetts · Massachusetts$426.72−$52.52
  3. Los Angeles, CA · California$474.20−$5.04
  4. Washington, DC area · District of Columbia$475.02−$4.22
  5. Miami, FL · Florida$429.82−$49.42
  6. Chicago, IL · Illinois$415.98−$63.26
  7. Manhattan, NY · New York$471.85−$7.39

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

Every other payment area

43757 in every other Medicare payment locality
Payment localityOfficeFacility
AlaskaAlaska$449.80$90.17
AlabamaAlabama$360.54$65.06
ArkansasArkansas$354.51$64.44
ArizonaArizona$395.93$68.71
Bakersfield, CACalifornia$441.54$71.43
Chico, CACalifornia$441.11$71.01
El Centro, CACalifornia$441.14$71.03
Fresno, CACalifornia$441.11$71.01

43757 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.

$354.51

$505.66

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

View every state and territory as a table
43757 office rate range by state
State / territoryOffice rate rangeLocalities
AK$449.801
AL$360.541
AR$354.511
AZ$395.931
CA$441.11–$570.2129
CO$430.471
CT$437.511
DC$475.021
DE$403.211
FL$394.25–$429.823
GA$369.62–$414.682
GU$455.461
HI$455.461
IA$374.231
ID$376.401
IL$378.96–$421.504
IN$378.991
KS$370.751
KY$367.241
LA$365.99–$387.102
MA$426.72–$479.242
MD$412.20–$475.023
ME$377.09–$402.842
MI$376.93–$398.362
MN$415.031
MO$357.74–$390.463
MS$356.281
MT$407.821
NC$381.881
ND$405.051
NE$377.041
NH$422.091
NJ$443.23–$468.662
NM$378.711
NV$407.411
NY$388.33–$482.895
OH$376.361
OK$368.041
OR$404.99–$447.472
PA$377.88–$424.312
PR$411.741
RI$420.051
SC$379.611
SD$404.721
TN$372.711
TX$374.91–$428.378
UT$385.621
VA$400.30–$475.022
VI$411.741
VT$401.891
WA$426.43–$491.212
WI$389.381
WV$362.411
WY$406.611

See 43757 in every payment locality

How the 43757 rate is calculated

Each of 43757’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 · 43757

RVUs × geographic indexes × conversion factor

Office or facility?

Work1.23

1.23 RVUs× 1.000 GPCI

Practice expense10.84

10.84 RVUs× 1.000 GPCI

Malpractice0.14

0.14 RVUs× 1.000 GPCI

Adjusted RVUs

12.2100

Conversion factor

$33.4009

Medicare rate

$407.82

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

The exact Metropolitan Boston, MA inputs and CMS source lines

PPRRVU2026_Oct_nonQPP.csv

5,288

Code
43757
Physician work
1.23
Practice expense
10.84
Malpractice
0.14

GPCI2026.csv

62

Locality
Metropolitan Boston, MA
Physician work
1.041
Practice expense
1.194
Malpractice
0.890
Office calculation for 43757 in Metropolitan Boston, MA
ComponentRVULocality factorAdjusted
Physician work1.23× 1.0411.2804
Practice expense10.84× 1.19412.9430
Malpractice0.14× 0.8900.1246
Total RVUs14.3480
Conversion factor× 33.4009

Office rate, Metropolitan Boston, MA$479.24

Office: (1.23 × 1.041 + 10.84 × 1.194 + 0.14 × 0.89) × $33.4009 = $479.24

Facility: (1.23 × 1.041 + 0.73 × 1.194 + 0.14 × 0.89) × $33.4009 = $76.04

Open 43757 in the RVU calculator

Payment rules and modifiers for 43757

The CMS indicators that decide how 43757 is paid alongside other services.

CMS payment indicators · 43757

Duodenal aspiration, multiple specimens

RuleCMS valueWhat it means
Global period000Same-day global: pre- and post-op care on the day of the procedure is included.
Multiple procedures0No multiple-procedure reduction.
Bilateral (modifier 50)0The 150% bilateral adjustment doesn’t apply.
Assistant at surgery (80/81/82/AS)2Paid.
Co-surgeons (62)0Not permitted.
Team surgery (66)0Not permitted.
Professional/technical0Physician service: no professional/technical split.

What modifiers do to the payment

Modifier 80 · payment effect

With and without the modifier

43757 without 80 · national office

$407.82

Duodenal aspiration, multiple specimens

43757-80 · Assistant: 16%

$65.25

A physician assistant at surgery is paid 16% of the surgeon’s fee schedule amount.

When to use modifier 80

Codes related to 43757

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

Codes related to 43757
CodeHow it relatesOffice range, Metropolitan Boston, MA
Same family
43756Duodenal aspiration, single specimenDiagnostic duodenal aspiration for a single specimen.$357.57
43755Gastric aspiration, multiple diagnostic specimensDiagnostic aspiration for multiple specimens, with the stomach as the sampling site.$262.38
43754Gastric aspiration, single specimenTherapeutic gastric intubation and aspiration rather than diagnostic duodenal sampling.$401.82

How 43757 has changed in Metropolitan Boston, MA

43757 · Office / nonfacility

$479.24

Effective 2026-10-01

The base rate is $74.00 higher than on 2025-10-01, moving from $405.24 to $479.24 (18.3%).

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

    $405.24changed to$479.24

    • Conversion factor 32.3465 changed to 33.4009
    • Work RVU 1.26 changed to 1.23
    • Practice expense RVU 9.25 changed to 10.84
    • Malpractice RVU 0.16 changed to 0.14
    • Work GPCI 1.042 changed to 1.041
    • Practice expense GPCI 1.197 changed to 1.194
    • Malpractice GPCI 0.894 changed to 0.890

    Held through RVU26B, RVU26C, RVU26D.

  2. January 1, 2025

    RVU25A

    $433.87changed to$405.24

    • Conversion factor 33.2875 changed to 32.3465
    • Practice expense RVU 9.68 changed to 9.25
    • Malpractice RVU 0.15 changed to 0.16

    Held through RVU25B, RVU25C, RVU25D.

  3. March 9, 2024

    RVU24AR

    $426.79changed to$433.87

    • Conversion factor 32.7442 changed to 33.2875

    Held through RVU24B, RVU24C, RVU24D.

  4. January 1, 2024

    RVU24A

    $448.95changed to$426.79

    • Conversion factor 33.8872 changed to 32.7442
    • Practice expense RVU 9.82 changed to 9.68
    • Malpractice RVU 0.17 changed to 0.15
    • Work GPCI 1.045 changed to 1.042
    • Practice expense GPCI 1.200 changed to 1.197
    • Malpractice GPCI 0.868 changed to 0.894

  5. January 1, 2023

    RVU23A

    $474.29changed to$448.95

    • Conversion factor 34.6062 changed to 33.8872
    • Practice expense RVU 10.21 changed to 9.82
    • Malpractice RVU 0.12 changed to 0.17
    • Work GPCI 1.049 changed to 1.045
    • Practice expense GPCI 1.203 changed to 1.200
    • Malpractice GPCI 0.842 changed to 0.868

    Held through RVU23B, RVU23C, RVU23D.

  6. January 1, 2022

    RVU22A

    $464.54changed to$474.29

    • Conversion factor 34.8931 changed to 34.6062
    • Practice expense RVU 9.87 changed to 10.21
    • Malpractice RVU 0.14 changed to 0.12

    Held through RVU22B, RVU22C, RVU22D.

  7. January 1, 2021

    RVU21A

    $411.57changed to$464.54

    • Conversion factor 36.0896 changed to 34.8931
    • Practice expense RVU 8.37 changed to 9.87
    • Malpractice RVU 0.13 changed to 0.14
    • Work GPCI 1.041 changed to 1.049
    • Practice expense GPCI 1.191 changed to 1.203
    • Malpractice GPCI 0.952 changed to 0.842

    Held through RVU21B, RVU21C, RVU21D.

  8. January 1, 2020

    RVU20A

    $378.50changed to$411.57

    • Conversion factor 36.0391 changed to 36.0896
    • Practice expense RVU 7.66 changed to 8.37
    • Malpractice RVU 0.16 changed to 0.13
    • Work GPCI 1.033 changed to 1.041
    • Practice expense GPCI 1.179 changed to 1.191
    • Malpractice GPCI 1.061 changed to 0.952

    Held through RVU20B, RVU20C, RVU20D.

  9. January 1, 2019

    RVU19A

    $347.95changed to$378.50

    • Conversion factor 35.9996 changed to 36.0391
    • Practice expense RVU 6.95 changed to 7.66

    Held through RVU19B, RVU19C, RVU19D.

  10. January 1, 2018

    RVU18AR1

    $338.62changed to$347.95

    • Conversion factor 35.8887 changed to 35.9996
    • Practice expense RVU 6.84 changed to 6.95
    • Work GPCI 1.025 changed to 1.033
    • Practice expense GPCI 1.171 changed to 1.179
    • Malpractice GPCI 0.839 changed to 1.061

    Held through RVU18B, RVU18C, RVU18D.

  11. January 1, 2017

    RVU17A

    $333.82changed to$338.62

    • Conversion factor 35.8043 changed to 35.8887
    • Practice expense RVU 6.83 changed to 6.84
    • Work GPCI 1.017 changed to 1.025
    • Practice expense GPCI 1.163 changed to 1.171
    • Malpractice GPCI 0.617 changed to 0.839

    Held through RVU17B, RVU17C, RVU17D.

  12. January 1, 2016

    RVU16A

    $341.74changed to$333.82

    • Conversion factor 35.9335 changed to 35.8043
    • Practice expense RVU 6.98 changed to 6.83
    • Malpractice RVU 0.18 changed to 0.16

    Held through RVU16B, RVU16C, RVU16D.

  13. July 1, 2015

    RVU15C

    $340.04changed to$341.74

    • Conversion factor 35.7547 changed to 35.9335

    Held through RVU15D.

  14. January 1, 2015

    RVU15A

    $339.83changed to$340.04

    • Conversion factor 35.8228 changed to 35.7547
    • Practice expense RVU 7.05 changed to 6.98
    • Malpractice RVU 0.08 changed to 0.18
    • Work GPCI 1.016 changed to 1.017
    • Practice expense GPCI 1.156 changed to 1.163
    • Malpractice GPCI 0.704 changed to 0.617

    Held through RVU15B.

  15. January 1, 2014

    RVU14A

    No ratechanged to$339.83

    Held through RVU14B, RVU14C, RVU14D.

  16. January 1, 2013

    RVU13AR

    Earliest loaded release: No rate

    Held through RVU13B, RVU13C, RVU13D.

Rates in every CMS release
Effective fromOfficeFacilityCMS release
2026-10-01$479.24$76.04RVU26D
2026-07-01$479.24$76.04RVU26C
2026-04-01$479.24$76.04RVU26B
2026-01-01$479.24$76.04RVU26A
2025-10-01$405.24$81.17RVU25D
2025-07-01$405.24$81.17RVU25C
2025-04-01$405.24$81.17RVU25B
2025-01-01$405.24$81.17RVU25A
2024-10-01$433.87$83.23RVU24D
2024-07-01$433.87$83.23RVU24C
2024-04-01$433.87$83.23RVU24B
2024-03-09$433.87$83.23RVU24AR
2024-01-01$426.79$81.87RVU24A
2023-10-01$448.95$84.18RVU23D
2023-07-01$448.95$84.18RVU23C
2023-04-01$448.95$84.18RVU23B
2023-01-01$448.95$84.18RVU23A
2022-10-01$474.29$84.62RVU22D
2022-07-01$474.29$84.62RVU22C
2022-04-01$474.29$84.62RVU22B
2022-01-01$474.29$84.62RVU22A
2021-10-01$464.54$85.07RVU21D
2021-07-01$464.54$85.07RVU21C
2021-04-01$464.54$85.07RVU21B
2021-01-01$464.54$85.07RVU21A
2020-10-01$411.57$86.62RVU20D
2020-07-01$411.57$86.62RVU20C
2020-04-01$411.57$86.62RVU20B
2020-01-01$411.57$86.62RVU20A
2019-10-01$378.50$87.44RVU19D
2019-07-01$378.50$87.44RVU19C
2019-04-01$378.50$87.44RVU19B
2019-01-01$378.50$87.44RVU19A
2018-10-01$347.95$88.20RVU18D
2018-07-01$347.95$88.20RVU18C
2018-04-01$347.95$88.20RVU18B
2018-01-01$347.95$88.20RVU18AR1
2017-10-01$338.62$86.05RVU17D
2017-07-01$338.62$86.05RVU17C
2017-04-01$338.62$86.05RVU17B
2017-01-01$338.62$86.05RVU17A
2016-10-01$333.82$83.98RVU16D
2016-07-01$333.82$83.98RVU16C
2016-04-01$333.82$83.98RVU16B
2016-01-01$333.82$83.98RVU16A
2015-10-01$341.74$85.98RVU15D
2015-07-01$341.74$85.98RVU15C
2015-04-01$340.04$85.55RVU15B
2015-01-01$340.04$85.55RVU15A
2014-10-01$339.83$83.90RVU14D
2014-07-01$339.83$83.90RVU14C
2014-04-01$339.83$83.90RVU14B
2014-01-01$339.83$83.90RVU14A
2013-10-01Rate data unavailableRate data unavailableRVU13D
2013-07-01Rate data unavailableRate data unavailableRVU13C
2013-04-01Rate data unavailableRate data unavailableRVU13B
2013-01-01Rate data unavailableRate data unavailableRVU13AR

Price 43757 for an earlier date of service

Where the Metropolitan Boston, MA rate applies

Metropolitan Boston, MA is a Medicare payment area, not a city. Our Census mapping connects it to 60 cities and communities in Massachusetts. Some span more than one payment area; confirm with the service ZIP.

  • Boston
  • Arlington
  • Ayer
  • Bellingham
  • Belmont
  • Braintree Town
  • Brookline
  • Burlington

Browse all communities in Massachusetts

43757 billing questions

How does this differ from 43756?

Both describe diagnostic duodenal aspiration. Use 43757 for multiple specimens and 43756 for a single specimen.

Can each specimen be billed as a separate unit?

The multiple-specimen code represents the diagnostic collection of multiple specimens. Document the collection clearly rather than counting each specimen as a separate service.

How does this differ from 43755?

Code 43755 is for diagnostic aspiration from the stomach. Code 43757 is for multiple diagnostic specimens collected from the duodenum.

Is same-day preoperative or postoperative care included?

Yes. The 0-day global period includes same-day preoperative and postoperative care.

Can an assistant or co-surgeon be reported?

CMS allows payment for an assistant at surgery. Co-surgeons and team surgery are not permitted for this 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 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 43757PPRRVU2026_Oct_nonQPP.csv, line 5,288 (RVU26D)
Geographic factors for Metropolitan Boston, MAGPCI2026.csv, line 62 (RVU26D)

Open CMS sourceHow we calculate rates

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