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CPT code 43756: Duodenal aspiration, single specimen2026 Medicare rate & RVUs in Chicago, IL

Reports diagnostic passage of a tube into the duodenum to aspirate one specimen of duodenal contents for laboratory evaluation.

CMS RVU26DEffective Oct 1, 2026One payment locality

In Chicago, IL, Medicare pays $307.86 for 43756 in the office and $50.40 when it’s performed in a hospital or facility.

$307.86Office (non-facility)
$50.40Hospital or facility
+1.5%vs the national office rate ($303.28)

Check a contract rate as a % of Medicare · 43756 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 43756 for the payment locality that covers the ZIP.

On this page 11 sections
  1. Rate in Chicago, IL
  2. What 43756 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 43756 covers

A clinician passes an intubation tube into the duodenum and aspirates duodenal contents for diagnostic testing. The service may be performed when a specimen of duodenal fluid is needed for laboratory evaluation; it is distinct from collecting gastric contents or placing a tube for therapeutic use. The code is for one specimen, making specimen count a key distinction from its duodenal sibling code.

Report the service when documentation supports diagnostic duodenal intubation and aspiration of a single specimen. The record should identify the duodenal site, the diagnostic purpose, and the specimen obtained. 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 Chicago, IL compares for 43756

Across 109 of 109 payment localities, the office rate for 43756 runs from $263.25 in Arkansas to $426.89 in San Benito County, CA. Chicago, IL pays $307.86. The RVUs are the same everywhere; the geographic indexes change the dollars.

43756 in Chicago, IL vs other payment areas
  1. Chicago, IL · this page$307.86
  2. East St. Louis, IL · Illinois$283.58−$24.28
  3. Rest of Illinois · Illinois$280.59−$27.27
  4. Suburban Chicago, IL · Illinois$312.71+$4.85
  5. Los Angeles, CA · California$354.01+$46.15
  6. Washington, DC area · District of Columbia$354.01+$46.15
  7. Miami, FL · Florida$318.17+$10.31

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

Every other payment area

43756 in every other Medicare payment locality
Payment localityOfficeFacility
Manhattan, NYNew York$350.95$53.26
AlaskaAlaska$332.69$59.85
AlabamaAlabama$267.78$43.62
ArkansasArkansas$263.25$43.18
ArizonaArizona$294.39$46.15
Bakersfield, CACalifornia$329.33$48.55
Chico, CACalifornia$329.11$48.33
El Centro, CACalifornia$329.12$48.34

43756 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.

$263.25

$378.00

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

View every state and territory as a table
43756 office rate range by state
State / territoryOffice rate rangeLocalities
AK$332.691
AL$267.781
AR$263.251
AZ$294.391
CA$329.11–$426.8929
CO$320.731
CT$325.521
DC$354.011
DE$299.861
FL$292.32–$318.173
GA$273.93–$308.242
GU$340.091
HI$340.091
IA$278.421
ID$279.981
IL$280.59–$312.714
IN$281.941
KS$275.631
KY$272.461
LA$271.45–$287.322
MA$317.83–$357.572
MD$306.65–$354.013
ME$280.33–$299.932
MI$279.58–$295.232
MN$309.641
MO$265.15–$290.043
MS$264.321
MT$303.281
NC$283.951
ND$301.891
NE$280.581
NH$314.301
NJ$329.89–$349.162
NM$280.851
NV$303.171
NY$288.79–$359.035
OH$279.301
OK$273.241
OR$301.48–$333.712
PA$280.53–$315.492
PR$306.281
RI$312.611
SC$281.961
SD$301.731
TN$277.091
TX$278.28–$319.078
UT$286.491
VA$297.90–$354.012
VI$306.281
VT$299.371
WA$317.67–$366.732
WI$290.071
WV$268.151
WY$302.671

See 43756 in every payment locality

How the 43756 rate is calculated

Each of 43756’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 · 43756

RVUs × geographic indexes × conversion factor

Office or facility?

Work0.75

0.75 RVUs× 1.000 GPCI

Practice expense8.26

8.26 RVUs× 1.000 GPCI

Malpractice0.07

0.07 RVUs× 1.000 GPCI

Adjusted RVUs

9.0800

Conversion factor

$33.4009

Medicare rate

$303.28

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

The exact Chicago, IL inputs and CMS source lines

PPRRVU2026_Oct_nonQPP.csv

5,287

Code
43756
Physician work
0.75
Practice expense
8.26
Malpractice
0.07

GPCI2026.csv

48

Locality
Chicago, IL
Physician work
1.007
Practice expense
1.005
Malpractice
2.295
Office calculation for 43756 in Chicago, IL
ComponentRVULocality factorAdjusted
Physician work0.75× 1.0070.7552
Practice expense8.26× 1.0058.3013
Malpractice0.07× 2.2950.1607
Total RVUs9.2172
Conversion factor× 33.4009

Office rate, Chicago, IL$307.86

Office: (0.75 × 1.007 + 8.26 × 1.005 + 0.07 × 2.295) × $33.4009 = $307.86

Facility: (0.75 × 1.007 + 0.59 × 1.005 + 0.07 × 2.295) × $33.4009 = $50.40

Open 43756 in the RVU calculator

Payment rules and modifiers for 43756

The CMS indicators that decide how 43756 is paid alongside other services.

CMS payment indicators · 43756

Duodenal aspiration, single specimen

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

43756 without 80 · national office

$303.28

Duodenal aspiration, single specimen

43756-80 · Assistant: 16%

$48.52

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

When to use modifier 80

Codes related to 43756

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

Codes related to 43756
CodeHow it relatesOffice range, Chicago, IL
Same family
43757Duodenal aspiration, multiple specimensDiagnostic duodenal aspiration when multiple specimens are obtained.$415.98
Used instead
43754Gastric aspiration, single specimenDiagnostic aspiration of a gastric specimen rather than a duodenal specimen.$345.82
43755Gastric aspiration, multiple diagnostic specimensDiagnostic aspiration of multiple gastric specimens.$229.52
43753Gastric aspiration, therapeutic decompressionTherapeutic gastric intubation with aspiration, rather than diagnostic duodenal sampling.No office rate
43752Gastric tube placement, nasal or oral routeNasal or oral gastric tube placement without this diagnostic duodenal aspiration service.No office rate

How 43756 has changed in Chicago, IL

43756 · Office / nonfacility

$307.86

Effective 2026-10-01

The base rate is $43.61 higher than on 2025-10-01, moving from $264.25 to $307.86 (16.5%).

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

    $264.25changed to$307.86

    • Conversion factor 32.3465 changed to 33.4009
    • Work RVU 0.77 changed to 0.75
    • Practice expense RVU 7.07 changed to 8.26
    • Malpractice RVU 0.08 changed to 0.07
    • Practice expense GPCI 1.023 changed to 1.005
    • Malpractice GPCI 2.018 changed to 2.295

    Held through RVU26B, RVU26C, RVU26D.

  2. January 1, 2025

    RVU25A

    $283.85changed to$264.25

    • Conversion factor 33.2875 changed to 32.3465
    • Practice expense RVU 7.40 changed to 7.07
    • Malpractice RVU 0.09 changed to 0.08

    Held through RVU25B, RVU25C, RVU25D.

  3. March 9, 2024

    RVU24AR

    $279.22changed to$283.85

    • Conversion factor 32.7442 changed to 33.2875

    Held through RVU24B, RVU24C, RVU24D.

  4. January 1, 2024

    RVU24A

    $295.81changed to$279.22

    • Conversion factor 33.8872 changed to 32.7442
    • Practice expense RVU 7.51 changed to 7.40
    • Malpractice RVU 0.10 changed to 0.09
    • Work GPCI 1.009 changed to 1.007
    • Practice expense GPCI 1.033 changed to 1.023
    • Malpractice GPCI 1.945 changed to 2.018

  5. January 1, 2023

    RVU23A

    $314.93changed to$295.81

    • Conversion factor 34.6062 changed to 33.8872
    • Practice expense RVU 7.81 changed to 7.51
    • Malpractice RVU 0.09 changed to 0.10
    • Work GPCI 1.011 changed to 1.009
    • Practice expense GPCI 1.044 changed to 1.033
    • Malpractice GPCI 1.871 changed to 1.945

    Held through RVU23B, RVU23C, RVU23D.

  6. January 1, 2022

    RVU22A

    $306.25changed to$314.93

    • Conversion factor 34.8931 changed to 34.6062
    • Practice expense RVU 7.50 changed to 7.81

    Held through RVU22B, RVU22C, RVU22D.

  7. January 1, 2021

    RVU21A

    $268.56changed to$306.25

    • Conversion factor 36.0896 changed to 34.8931
    • Practice expense RVU 6.25 changed to 7.50
    • Work GPCI 1.009 changed to 1.011
    • Practice expense GPCI 1.039 changed to 1.044
    • Malpractice GPCI 1.898 changed to 1.871

    Held through RVU21B, RVU21C, RVU21D.

  8. January 1, 2020

    RVU20A

    $245.45changed to$268.56

    • Conversion factor 36.0391 changed to 36.0896
    • Practice expense RVU 5.65 changed to 6.25
    • Malpractice RVU 0.10 changed to 0.09
    • Work GPCI 1.008 changed to 1.009
    • Practice expense GPCI 1.034 changed to 1.039
    • Malpractice GPCI 1.925 changed to 1.898

    Held through RVU20B, RVU20C, RVU20D.

  9. January 1, 2019

    RVU19A

    $222.48changed to$245.45

    • Conversion factor 35.9996 changed to 36.0391
    • Practice expense RVU 5.04 changed to 5.65

    Held through RVU19B, RVU19C, RVU19D.

  10. January 1, 2018

    RVU18AR1

    $216.11changed to$222.48

    • Conversion factor 35.8887 changed to 35.9996
    • Practice expense RVU 4.87 changed to 5.04
    • Work GPCI 1.012 changed to 1.008
    • Practice expense GPCI 1.036 changed to 1.034
    • Malpractice GPCI 1.972 changed to 1.925

    Held through RVU18B, RVU18C, RVU18D.

  11. January 1, 2017

    RVU17A

    $219.77changed to$216.11

    • Conversion factor 35.8043 changed to 35.8887
    • Practice expense RVU 4.97 changed to 4.87
    • Work GPCI 1.016 changed to 1.012
    • Practice expense GPCI 1.037 changed to 1.036
    • Malpractice GPCI 2.019 changed to 1.972

    Held through RVU17B, RVU17C, RVU17D.

  12. January 1, 2016

    RVU16A

    $222.78changed to$219.77

    • Conversion factor 35.9335 changed to 35.8043
    • Practice expense RVU 5.01 changed to 4.97
    • Malpractice RVU 0.11 changed to 0.10

    Held through RVU16B, RVU16C, RVU16D.

  13. July 1, 2015

    RVU15C

    $221.67changed to$222.78

    • Conversion factor 35.7547 changed to 35.9335

    Held through RVU15D.

  14. January 1, 2015

    RVU15A

    $224.87changed to$221.67

    • Conversion factor 35.8228 changed to 35.7547
    • Practice expense RVU 5.16 changed to 5.01
    • Malpractice RVU 0.05 changed to 0.11
    • Work GPCI 1.023 changed to 1.016
    • Practice expense GPCI 1.044 changed to 1.037
    • Malpractice GPCI 2.048 changed to 2.019

    Held through RVU15B.

  15. January 1, 2014

    RVU14A

    $244.35changed to$224.87

    • Conversion factor 34.0230 changed to 35.8228
    • Practice expense RVU 5.98 changed to 5.16
    • Work GPCI 1.030 changed to 1.023
    • Practice expense GPCI 1.051 changed to 1.044
    • Malpractice GPCI 2.077 changed to 2.048

    Held through RVU14B, RVU14C, RVU14D.

  16. October 1, 2013

    RVU13D

    No ratechanged to$244.35

  17. January 1, 2013

    RVU13AR

    Earliest loaded release: No rate

    Held through RVU13B, RVU13C.

Rates in every CMS release
Effective fromOfficeFacilityCMS release
2026-10-01$307.86$50.40RVU26D
2026-07-01$307.86$50.40RVU26C
2026-04-01$307.86$50.40RVU26B
2026-01-01$307.86$50.40RVU26A
2025-10-01$264.25$52.14RVU25D
2025-07-01$264.25$52.14RVU25C
2025-04-01$264.25$52.14RVU25B
2025-01-01$264.25$52.14RVU25A
2024-10-01$283.85$54.33RVU24D
2024-07-01$283.85$54.33RVU24C
2024-04-01$283.85$54.33RVU24B
2024-03-09$283.85$54.33RVU24AR
2024-01-01$279.22$53.44RVU24A
2023-10-01$295.81$55.32RVU23D
2023-07-01$295.81$55.32RVU23C
2023-04-01$295.81$55.32RVU23B
2023-01-01$295.81$55.32RVU23A
2022-10-01$314.93$55.53RVU22D
2022-07-01$314.93$55.53RVU22C
2022-04-01$314.93$55.53RVU22B
2022-01-01$314.93$55.53RVU22A
2021-10-01$306.25$55.62RVU21D
2021-07-01$306.25$55.62RVU21C
2021-04-01$306.25$55.62RVU21B
2021-01-01$306.25$55.62RVU21A
2020-10-01$268.56$56.70RVU20D
2020-07-01$268.56$56.70RVU20C
2020-04-01$268.56$56.70RVU20B
2020-01-01$268.56$56.70RVU20A
2019-10-01$245.45$57.64RVU19D
2019-07-01$245.45$57.64RVU19C
2019-04-01$245.45$57.64RVU19B
2019-01-01$245.45$57.64RVU19A
2018-10-01$222.48$57.95RVU18D
2018-07-01$222.48$57.95RVU18C
2018-04-01$222.48$57.95RVU18B
2018-01-01$222.48$57.95RVU18AR1
2017-10-01$216.11$57.35RVU17D
2017-07-01$216.11$57.35RVU17C
2017-04-01$216.11$57.35RVU17B
2017-01-01$216.11$57.35RVU17A
2016-10-01$219.77$57.89RVU16D
2016-07-01$219.77$57.89RVU16C
2016-04-01$219.77$57.89RVU16B
2016-01-01$219.77$57.89RVU16A
2015-10-01$222.78$59.57RVU15D
2015-07-01$222.78$59.57RVU15C
2015-04-01$221.67$59.27RVU15B
2015-01-01$221.67$59.27RVU15A
2014-10-01$224.87$55.82RVU14D
2014-07-01$224.87$55.82RVU14C
2014-04-01$224.87$55.82RVU14B
2014-01-01$224.87$55.82RVU14A
2013-10-01$244.35$56.62RVU13D
2013-07-01Rate data unavailableRate data unavailableRVU13C
2013-04-01Rate data unavailableRate data unavailableRVU13B
2013-01-01Rate data unavailableRate data unavailableRVU13AR

Price 43756 for an earlier date of service

Where the Chicago, IL rate applies

Chicago, IL is a Medicare payment area, not a city. Our Census mapping connects it to 137 cities and communities in Illinois. Some span more than one payment area; confirm with the service ZIP.

Browse all communities in Illinois

43756 billing questions

When should 43756 be chosen over 43757?

Use 43756 for aspiration of one diagnostic duodenal specimen. The related 43757 code is for multiple specimens.

How does this differ from gastric intubation codes?

43756 involves diagnostic intubation and aspiration in the duodenum. Codes 43754 and 43755 concern gastric specimens, with the specimen count distinguishing those codes.

Can tube placement be billed separately?

The intubation and aspiration are part of this diagnostic service. Do not separately report a tube-placement service for the same intubation.

What documentation supports reporting 43756?

Document that the tube reached the duodenum, that aspiration was performed for diagnostic evaluation, and that one specimen was obtained.

Can modifier 50 be used, or can co-surgeons be reported?

Modifier 50 is inappropriate for this service. CMS does not permit co-surgeons or team surgery; an assistant at surgery may be paid.

What care is included in the global period?

The service has a 0-day global period, which includes same-day preoperative and postoperative care.

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 43756PPRRVU2026_Oct_nonQPP.csv, line 5,287 (RVU26D)
Geographic factors for Chicago, ILGPCI2026.csv, line 48 (RVU26D)

Open CMS sourceHow we calculate rates

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