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CMS RVU26D · Effective 2026-10-01

91034 in Delaware

Office / nonfacility

$200.28

Base rate per service

Facility setting

Not available in this setting

Base rate per service

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.

Gastroenterology

About 91034: Transnasal esophageal pH monitoring

Reports ambulatory esophageal acid monitoring with a transnasal catheter to evaluate reflux and correlate recorded acid events with symptoms.

This service evaluates gastroesophageal reflux by placing a pH-sensing catheter through the nose into the esophagus and recording acid exposure during ambulatory monitoring, commonly over 24 hours. A gastroenterologist or other qualified clinician places the catheter; the study data are analyzed and interpreted to assess acid reflux and its relationship to reported symptoms. It may be used when reflux symptoms persist or when objective acid-exposure data are needed in a reflux evaluation.

Report 91034 for catheter-based pH monitoring, not a wireless capsule study or an impedance-based test. The record should support catheter placement, monitoring, analysis, and interpretation. CMS assigns a 0-day global period, so same-day preoperative and postoperative care is included. Bill the global service without a modifier, or use modifier 26 for interpretation or TC for the technical service. Modifier 50 is inappropriate. Assistant-at-surgery payment requires documented medical necessity; co-surgeons and team surgery are not permitted.

CMS billing rules for 91034

Global period
Minor procedure with a 0-day global period: same-day preoperative and postoperative care is included.
Professional and technical components
Diagnostic test with a professional component (modifier 26, interpretation) and a technical component (modifier TC, equipment and staff); billing without a modifier is the global service.
Bilateral procedures
Bilateral adjustment does not apply; the descriptor or anatomy makes modifier 50 inappropriate.
Assistant at surgery
Assistant at surgery is paid only with documentation of medical necessity.
Co-surgeons
Co-surgeons not permitted.
Team surgery
Team surgery not permitted.

Where the value comes from

  • Work RVU0.95 · 16%
  • Practice expense (office) RVU5.03 · 83%
  • Malpractice RVU0.08 · 1%

2.9K

Medicare services in 2024 · #2195 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.

91034 compared with similar codes

Office rates for Delaware, from the same CMS release.

91035

Reflux testing

Mucosa-attached telemetry electrode

$496.76

Choose 91034 for pH monitoring with a transnasal catheter; choose 91035 when the study uses wireless pH monitoring.

91037

Esophageal impedance

One hour or less

$185.46

91037 describes impedance-based reflux testing. Use 91034 when the performed study is catheter-based pH monitoring without impedance.

91038

Esophageal impedance

More than one hour

$440.94

91038 is an impedance-based reflux test. The presence of impedance in the performed study distinguishes it from 91034.

91030

Acid challenge

Provocative esophageal acid test

$161.07

91030 is an acid-perfusion test that provokes an esophageal response; 91034 records esophageal acid exposure during pH monitoring.

The same code, a different location

How does Delaware compare?

91034 across payment areas

Same release and payment basis · bars start at $0

  1. Delaware · This locality

    $200.28

  2. Los Angeles-Long Beach-Anaheim (Los Angeles/Orange Cnty)

    $233.56

    $33.28 higher than Delaware

  3. Dc + Md/Va Suburbs

    $234.33

    $34.05 higher than Delaware

  4. Miami

    $213.38

    $13.10 higher than Delaware

  5. Chicago

    $206.93

    $6.65 higher than Delaware

  6. Manhattan

    $233.22

    $32.94 higher than Delaware

  7. Alaska*

    $228.00

    $27.72 higher than Delaware

Other payment areas listed in Delaware appear first, followed by selected cross-country examples. The chart compares amounts, not distance.

Across 109 of 109 CMS payment localities with a supported office rate, 91034 ranges from $177.42 in Arkansas to $278.92 in San Jose-Sunnyvale-Santa Clara (San Benito Cnty). This is a geographic range, not an average.

The code’s RVUs stay the same in these comparisons. Geographic adjustments to work, practice expense and malpractice change the dollar amount. A city name alone may not identify the payment area for a service address.

Compare all 108 other payment areas

  • Alabama

    Alabama · 91034

    Office

    $180.25

    Facility

    Unavailable

    $20.03 lower than Delaware for the office setting.

  • Arkansas

    Arkansas · 91034

    Office

    $177.42

    Facility

    Unavailable

    $22.86 lower than Delaware for the office setting.

  • Arizona

    Arizona · 91034

    Office

    $196.82

    Facility

    Unavailable

    $3.46 lower than Delaware for the office setting.

  • Bakersfield

    California · 91034

    Office

    $218.10

    Facility

    Unavailable

    $17.82 higher than Delaware for the office setting.

  • Chico

    California · 91034

    Office

    $217.84

    Facility

    Unavailable

    $17.56 higher than Delaware for the office setting.

  • El Centro

    California · 91034

    Office

    $217.85

    Facility

    Unavailable

    $17.57 higher than Delaware for the office setting.

  • Fresno

    California · 91034

    Office

    $217.84

    Facility

    Unavailable

    $17.56 higher than Delaware for the office setting.

  • Hanford-Corcoran

    California · 91034

    Office

    $217.84

    Facility

    Unavailable

    $17.56 higher than Delaware for the office setting.

  • Madera

    California · 91034

    Office

    $217.84

    Facility

    Unavailable

    $17.56 higher than Delaware for the office setting.

  • Merced

    California · 91034

    Office

    $217.84

    Facility

    Unavailable

    $17.56 higher than Delaware for the office setting.

  • Modesto

    California · 91034

    Office

    $217.84

    Facility

    Unavailable

    $17.56 higher than Delaware for the office setting.

  • Napa

    California · 91034

    Office

    $256.52

    Facility

    Unavailable

    $56.24 higher than Delaware for the office setting.

  • Oxnard-Thousand Oaks-Ventura

    California · 91034

    Office

    $232.87

    Facility

    Unavailable

    $32.59 higher than Delaware for the office setting.

  • Redding

    California · 91034

    Office

    $217.84

    Facility

    Unavailable

    $17.56 higher than Delaware for the office setting.

  • Rest Of California

    California · 91034

    Office

    $217.84

    Facility

    Unavailable

    $17.56 higher than Delaware for the office setting.

  • Riverside-San Bernardino-Ontario

    California · 91034

    Office

    $218.72

    Facility

    Unavailable

    $18.44 higher than Delaware for the office setting.

  • Sacramento-Roseville-Folsom

    California · 91034

    Office

    $229.70

    Facility

    Unavailable

    $29.42 higher than Delaware for the office setting.

  • Salinas

    California · 91034

    Office

    $228.87

    Facility

    Unavailable

    $28.59 higher than Delaware for the office setting.

  • San Diego-Chula Vista-Carlsbad

    California · 91034

    Office

    $235.07

    Facility

    Unavailable

    $34.79 higher than Delaware for the office setting.

  • San Francisco-Oakland-Berkeley (Marin Cnty)

    California · 91034

    Office

    $272.86

    Facility

    Unavailable

    $72.58 higher than Delaware for the office setting.

  • San Francisco-Oakland-Berkeley (San Francisco/San Mateo/Alameda/Contra Costa Cnty)

    California · 91034

    Office

    $272.77

    Facility

    Unavailable

    $72.49 higher than Delaware for the office setting.

  • San Jose-Sunnyvale-Santa Clara (San Benito Cnty)

    California · 91034

    Office

    $278.92

    Facility

    Unavailable

    $78.64 higher than Delaware for the office setting.

  • San Jose-Sunnyvale-Santa Clara (Santa Clara Cnty)

    California · 91034

    Office

    $278.55

    Facility

    Unavailable

    $78.27 higher than Delaware for the office setting.

  • San Luis Obispo-Paso Robles

    California · 91034

    Office

    $225.06

    Facility

    Unavailable

    $24.78 higher than Delaware for the office setting.

  • Santa Cruz-Watsonville

    California · 91034

    Office

    $237.96

    Facility

    Unavailable

    $37.68 higher than Delaware for the office setting.

  • Santa Maria-Santa Barbara

    California · 91034

    Office

    $229.95

    Facility

    Unavailable

    $29.67 higher than Delaware for the office setting.

  • Santa Rosa-Petaluma

    California · 91034

    Office

    $240.43

    Facility

    Unavailable

    $40.15 higher than Delaware for the office setting.

  • Stockton

    California · 91034

    Office

    $217.84

    Facility

    Unavailable

    $17.56 higher than Delaware for the office setting.

  • Vallejo

    California · 91034

    Office

    $256.39

    Facility

    Unavailable

    $56.11 higher than Delaware for the office setting.

  • Visalia

    California · 91034

    Office

    $217.84

    Facility

    Unavailable

    $17.56 higher than Delaware for the office setting.

  • Yuba City

    California · 91034

    Office

    $217.84

    Facility

    Unavailable

    $17.56 higher than Delaware for the office setting.

  • Colorado

    Colorado · 91034

    Office

    $212.96

    Facility

    Unavailable

    $12.68 higher than Delaware for the office setting.

  • Connecticut

    Connecticut · 91034

    Office

    $216.54

    Facility

    Unavailable

    $16.26 higher than Delaware for the office setting.

  • Fort Lauderdale

    Florida · 91034

    Office

    $206.75

    Facility

    Unavailable

    $6.47 higher than Delaware for the office setting.

  • Rest Of Florida

    Florida · 91034

    Office

    $196.36

    Facility

    Unavailable

    $3.92 lower than Delaware for the office setting.

  • Atlanta

    Georgia · 91034

    Office

    $205.73

    Facility

    Unavailable

    $5.45 higher than Delaware for the office setting.

  • Rest Of Georgia

    Georgia · 91034

    Office

    $184.78

    Facility

    Unavailable

    $15.50 lower than Delaware for the office setting.

  • Hawaii, Guam

    Hawaii · 91034

    Office

    $224.30

    Facility

    Unavailable

    $24.02 higher than Delaware for the office setting.

  • Iowa

    Iowa · 91034

    Office

    $186.52

    Facility

    Unavailable

    $13.76 lower than Delaware for the office setting.

  • Idaho

    Idaho · 91034

    Office

    $187.56

    Facility

    Unavailable

    $12.72 lower than Delaware for the office setting.

  • East St. Louis

    Illinois · 91034

    Office

    $191.68

    Facility

    Unavailable

    $8.60 lower than Delaware for the office setting.

  • Rest Of Illinois

    Illinois · 91034

    Office

    $189.30

    Facility

    Unavailable

    $10.98 lower than Delaware for the office setting.

  • Suburban Chicago

    Illinois · 91034

    Office

    $209.23

    Facility

    Unavailable

    $8.95 higher than Delaware for the office setting.

  • Indiana

    Indiana · 91034

    Office

    $188.77

    Facility

    Unavailable

    $11.51 lower than Delaware for the office setting.

  • Kansas

    Kansas · 91034

    Office

    $184.96

    Facility

    Unavailable

    $15.32 lower than Delaware for the office setting.

  • Kentucky

    Kentucky · 91034

    Office

    $183.53

    Facility

    Unavailable

    $16.75 lower than Delaware for the office setting.

  • New Orleans

    Louisiana · 91034

    Office

    $192.86

    Facility

    Unavailable

    $7.42 lower than Delaware for the office setting.

  • Rest Of Louisiana

    Louisiana · 91034

    Office

    $182.98

    Facility

    Unavailable

    $17.30 lower than Delaware for the office setting.

  • Metropolitan Boston

    Massachusetts · 91034

    Office

    $236.01

    Facility

    Unavailable

    $35.73 higher than Delaware for the office setting.

  • Rest Of Massachusetts

    Massachusetts · 91034

    Office

    $211.28

    Facility

    Unavailable

    $11.00 higher than Delaware for the office setting.

  • Baltimore/Surr. Cntys

    Maryland · 91034

    Office

    $215.81

    Facility

    Unavailable

    $15.53 higher than Delaware for the office setting.

  • Rest Of Maryland

    Maryland · 91034

    Office

    $204.52

    Facility

    Unavailable

    $4.24 higher than Delaware for the office setting.

  • Rest Of Maine

    Maine · 91034

    Office

    $187.96

    Facility

    Unavailable

    $12.32 lower than Delaware for the office setting.

  • Southern Maine

    Maine · 91034

    Office

    $199.91

    Facility

    Unavailable

    $0.37 lower than Delaware for the office setting.

  • Detroit

    Michigan · 91034

    Office

    $198.36

    Facility

    Unavailable

    $1.92 lower than Delaware for the office setting.

  • Rest Of Michigan

    Michigan · 91034

    Office

    $188.14

    Facility

    Unavailable

    $12.14 lower than Delaware for the office setting.

  • Minnesota

    Minnesota · 91034

    Office

    $205.40

    Facility

    Unavailable

    $5.12 higher than Delaware for the office setting.

  • Metropolitan Kansas City

    Missouri · 91034

    Office

    $192.10

    Facility

    Unavailable

    $8.18 lower than Delaware for the office setting.

  • Metropolitan St. Louis

    Missouri · 91034

    Office

    $194.35

    Facility

    Unavailable

    $5.93 lower than Delaware for the office setting.

  • Rest Of Missouri

    Missouri · 91034

    Office

    $179.16

    Facility

    Unavailable

    $21.12 lower than Delaware for the office setting.

  • Mississippi

    Mississippi · 91034

    Office

    $178.36

    Facility

    Unavailable

    $21.92 lower than Delaware for the office setting.

  • Montana**

    Montana · 91034

    Office

    $202.40

    Facility

    Unavailable

    $2.12 higher than Delaware for the office setting.

  • North Carolina

    North Carolina · 91034

    Office

    $190.19

    Facility

    Unavailable

    $10.09 lower than Delaware for the office setting.

  • North Dakota**

    North Dakota · 91034

    Office

    $200.82

    Facility

    Unavailable

    $0.54 higher than Delaware for the office setting.

  • Nebraska

    Nebraska · 91034

    Office

    $187.81

    Facility

    Unavailable

    $12.47 lower than Delaware for the office setting.

  • New Hampshire

    New Hampshire · 91034

    Office

    $208.96

    Facility

    Unavailable

    $8.68 higher than Delaware for the office setting.

  • Northern Nj

    New Jersey · 91034

    Office

    $231.47

    Facility

    Unavailable

    $31.19 higher than Delaware for the office setting.

  • Rest Of New Jersey

    New Jersey · 91034

    Office

    $219.39

    Facility

    Unavailable

    $19.11 higher than Delaware for the office setting.

  • New Mexico

    New Mexico · 91034

    Office

    $189.00

    Facility

    Unavailable

    $11.28 lower than Delaware for the office setting.

  • Nevada**

    Nevada · 91034

    Office

    $202.13

    Facility

    Unavailable

    $1.85 higher than Delaware for the office setting.

  • Nyc Suburbs/Long Island

    New York · 91034

    Office

    $238.48

    Facility

    Unavailable

    $38.20 higher than Delaware for the office setting.

  • Poughkpsie/N Nyc Suburbs

    New York · 91034

    Office

    $220.36

    Facility

    Unavailable

    $20.08 higher than Delaware for the office setting.

  • Queens

    New York · 91034

    Office

    $236.20

    Facility

    Unavailable

    $35.92 higher than Delaware for the office setting.

  • Rest Of New York

    New York · 91034

    Office

    $193.22

    Facility

    Unavailable

    $7.06 lower than Delaware for the office setting.

  • Ohio

    Ohio · 91034

    Office

    $187.81

    Facility

    Unavailable

    $12.47 lower than Delaware for the office setting.

  • Oklahoma

    Oklahoma · 91034

    Office

    $183.84

    Facility

    Unavailable

    $16.44 lower than Delaware for the office setting.

  • Portland

    Oregon · 91034

    Office

    $220.88

    Facility

    Unavailable

    $20.60 higher than Delaware for the office setting.

  • Rest Of Oregon

    Oregon · 91034

    Office

    $200.94

    Facility

    Unavailable

    $0.66 higher than Delaware for the office setting.

  • Metropolitan Philadelphia

    Pennsylvania · 91034

    Office

    $210.38

    Facility

    Unavailable

    $10.10 higher than Delaware for the office setting.

  • Rest Of Pennsylvania

    Pennsylvania · 91034

    Office

    $188.49

    Facility

    Unavailable

    $11.79 lower than Delaware for the office setting.

  • Puerto Rico

    Puerto Rico · 91034

    Office

    $204.22

    Facility

    Unavailable

    $3.94 higher than Delaware for the office setting.

  • Rhode Island

    Rhode Island · 91034

    Office

    $208.27

    Facility

    Unavailable

    $7.99 higher than Delaware for the office setting.

  • South Carolina

    South Carolina · 91034

    Office

    $189.24

    Facility

    Unavailable

    $11.04 lower than Delaware for the office setting.

  • South Dakota**

    South Dakota · 91034

    Office

    $200.64

    Facility

    Unavailable

    $0.36 higher than Delaware for the office setting.

  • Tennessee

    Tennessee · 91034

    Office

    $185.88

    Facility

    Unavailable

    $14.40 lower than Delaware for the office setting.

  • Austin

    Texas · 91034

    Office

    $211.91

    Facility

    Unavailable

    $11.63 higher than Delaware for the office setting.

  • Beaumont

    Texas · 91034

    Office

    $187.10

    Facility

    Unavailable

    $13.18 lower than Delaware for the office setting.

  • Brazoria

    Texas · 91034

    Office

    $200.56

    Facility

    Unavailable

    $0.28 higher than Delaware for the office setting.

  • Dallas

    Texas · 91034

    Office

    $201.64

    Facility

    Unavailable

    $1.36 higher than Delaware for the office setting.

  • Fort Worth

    Texas · 91034

    Office

    $200.00

    Facility

    Unavailable

    $0.28 lower than Delaware for the office setting.

  • Galveston

    Texas · 91034

    Office

    $201.03

    Facility

    Unavailable

    $0.75 higher than Delaware for the office setting.

  • Houston

    Texas · 91034

    Office

    $202.49

    Facility

    Unavailable

    $2.21 higher than Delaware for the office setting.

  • Rest Of Texas

    Texas · 91034

    Office

    $193.58

    Facility

    Unavailable

    $6.70 lower than Delaware for the office setting.

  • Utah

    Utah · 91034

    Office

    $192.06

    Facility

    Unavailable

    $8.22 lower than Delaware for the office setting.

  • Virginia

    Virginia · 91034

    Office

    $198.77

    Facility

    Unavailable

    $1.51 lower than Delaware for the office setting.

  • Virgin Islands

    United States Virgin Islands · 91034

    Office

    $204.22

    Facility

    Unavailable

    $3.94 higher than Delaware for the office setting.

  • Vermont

    Vermont · 91034

    Office

    $199.41

    Facility

    Unavailable

    $0.87 lower than Delaware for the office setting.

  • Rest Of Washington

    Washington · 91034

    Office

    $211.09

    Facility

    Unavailable

    $10.81 higher than Delaware for the office setting.

  • Seattle (King Cnty)

    Washington · 91034

    Office

    $241.64

    Facility

    Unavailable

    $41.36 higher than Delaware for the office setting.

  • Wisconsin

    Wisconsin · 91034

    Office

    $193.50

    Facility

    Unavailable

    $6.78 lower than Delaware for the office setting.

  • West Virginia

    West Virginia · 91034

    Office

    $181.55

    Facility

    Unavailable

    $18.73 lower than Delaware for the office setting.

  • Wyoming**

    Wyoming · 91034

    Office

    $201.71

    Facility

    Unavailable

    $1.43 higher than Delaware for the office setting.

See how rates vary across the country

91034 · Office / nonfacility · Non-QP. Choose a state to explore its payment localities. A range means the amount varies within that state.

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.

$177.42

$248.38

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

View all state and territory rates as a table
State / territoryRate rangeLocalities
AK$228.001
AL$180.251
AR$177.421
AZ$196.821
CA$217.84–$278.9229
CO$212.961
CT$216.541
DC$234.331
DE$200.281
FL$196.36–$213.383
GA$184.78–$205.732
GU$224.301
HI$224.301
IA$186.521
ID$187.561
IL$189.30–$209.234
IN$188.771
KS$184.961
KY$183.531
LA$182.98–$192.862
MA$211.28–$236.012
MD$204.52–$234.333
ME$187.96–$199.912
MI$188.14–$198.362
MN$205.401
MO$179.16–$194.353
MS$178.361
MT$202.401
NC$190.191
ND$200.821
NE$187.811
NH$208.961
NJ$219.39–$231.472
NM$189.001
NV$202.131
NY$193.22–$238.485
OH$187.811
OK$183.841
OR$200.94–$220.882
PA$188.49–$210.382
PR$204.221
RI$208.271
SC$189.241
SD$200.641
TN$185.881
TX$187.10–$211.918
UT$192.061
VA$198.77–$234.332
VI$204.221
VT$199.411
WA$211.09–$241.642
WI$193.501
WV$181.551
WY$201.711

Explore 91034 on the national rate map →

Where does this rate apply?

Delaware is a Medicare payment area. Our Census mapping connects it to 79 cities and communities in Delaware, including the examples shown here.

Some communities span more than one payment area. Follow a city link to compare all of its mapped areas, or check the service-location ZIP above for an address-level starting point.

Browse all communities in Delaware →

Use this rate

What is a percentage of Medicare worth?

Turn a percentage into dollars for 91034 in Delaware. This uses the base rate on this page, so the locality and release stay consistent.

Reference amount per service

$220.31

$200.28 × 110% = $220.31

A contract may specify another Medicare year or additional adjustments. This is percentage arithmetic on the displayed base rate, not a claim adjudication.

Working with a whole code list?

Compare an offer across your annual code mix, including an older Medicare schedule or flat per-code rates.

Compare your contract offer →

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 91034 in Delaware.

PPRRVU2026_Oct_nonQPP.csv

11,603

Code
91034
Physician work
0.95
Practice expense
5.03
Malpractice
0.08

GPCI2026.csv

40

Locality
Delaware
Physician work
1.005
Practice expense
0.988
Malpractice
0.899
Office / nonfacility calculation for 91034 in Delaware
ComponentRVULocality factorAdjusted
Physician work0.95× 1.0050.9547
Practice expense5.03× 0.9884.9696
Malpractice0.08× 0.8990.0719
Total RVUs5.9963
Conversion factor× 33.4009

Office / nonfacility rate, Delaware$200.28

Open 91034 in the RVU calculator →

Explore RVUs, geographic factors and the full formula

Office / nonfacility

Office / nonfacility calculation inputs
ComponentRVULocal GPCI
Work0.951.005
Practice expense5.030.988
Malpractice0.080.899

(0.95 × 1.005 + 5.03 × 0.988 + 0.08 × 0.899) × $33.4009 = $200.28

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.

How this rate has changed

91034 · Office / nonfacility

$200.28

Effective 2026-10-01

The base rate is $20.15 higher than on 2025-10-01, moving from $180.13 to $200.28 (11.2%).

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

    $180.13changed to$200.28

    • Conversion factor 32.3465 changed to 33.4009
    • Work RVU 0.97 changed to 0.95
    • Practice expense RVU 4.56 changed to 5.03
    • Malpractice RVU 0.07 changed to 0.08
    • Work GPCI 1.009 changed to 1.005
    • Practice expense GPCI 0.992 changed to 0.988
    • Malpractice GPCI 0.949 changed to 0.899

    Held through RVU26B, RVU26C, RVU26D.

  2. January 1, 2025

    RVU25A

    Earliest loaded release: $180.13

    Held through RVU25B, RVU25C, RVU25D.

Explore release dates and calculate this code in an earlier period →

Each row uses the accepted CMS release effective on that date and the same contractor and locality identifiers. Missing rates stay visible. Historical boundaries may differ; verify the service address for an older claim.

Inspect every release and its CMS source
Effective fromOffice / nonfacilityFacilityCMS release
2026-10-01$200.28Not available in this settingRVU26D
2026-07-01$200.28Not available in this settingRVU26C
2026-04-01$200.28Not available in this settingRVU26B
2026-01-01$200.28Not available in this settingRVU26A
2025-10-01$180.13Not available in this settingRVU25D
2025-07-01$180.13Not available in this settingRVU25C
2025-04-01$180.13Not available in this settingRVU25B
2025-01-01$180.13Not available in this settingRVU25A

91034 billing questions

How does 91034 differ from 91035?

91034 is for pH monitoring with a transnasal catheter. 91035 is the wireless pH-monitoring method.

Can the interpretation be billed separately?

Yes. Modifier 26 identifies the professional interpretation; TC identifies the technical service. Without either modifier, the claim represents the global service.

What should the record support?

Document the catheter-based monitoring, recorded study data, analysis, and interpretation. The report should identify the findings relevant to esophageal acid exposure and reflux symptoms.

Should modifier 50 be appended?

No. CMS identifies modifier 50 as inappropriate for this service.

How does 91034 differ from impedance reflux testing?

91034 reports catheter-based pH monitoring. Codes 91037 and 91038 describe impedance-based reflux testing, so code selection follows the test actually performed.

Are same-day care and surgical-team services separately payable?

Same-day preoperative and postoperative care is included in the 0-day global period. Assistant-at-surgery payment requires documented medical necessity, while co-surgeons and team surgery are not permitted.

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.

RVUs for 91034PPRRVU2026_Oct_nonQPP.csv, line 11,603 (RVU26D)
Geographic factors for DelawareGPCI2026.csv, line 40 (RVU26D)
Open CMS sourceHow this rate is calculatedBuild a fee sheet