What is John Vainder's specialty?

John Vainder (NPI 1508858226) is a Medicare-billing provider whose primary specialty is Gastroenterology in Evanston, IL.

Where does John Vainder practice?

John Vainder practices in Evanston, IL, based on the location reported in the CMS Medicare provider datasets for NPI 1508858226.

How much does Medicare pay John Vainder?

John Vainder (NPI 1508858226) received approximately $61K in total Medicare Part B payments, serving 342 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1508858226

John VainderMD

GastroenterologyEvanston, ILI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

493

Unique beneficiaries

—

Total services

591

Distinct HCPCS

Medicare payment

$53K

Peer benchmark

Total Medicare services vs. 606 Gastroenterology providers in IL — above median (cohort median 726).

PRESCRIBING · PART D · 2024

Total Rx claims

522

Beneficiaries

—

Total drug cost

$40K

Distinct drugs

Brand share

32.0%

Top prescribed drugs

Famotidine176 claims

Pantoprazole Sodium102 claims

Peg3350/Sod Sulf,bicarb,cl/Kcl81 claims

Peg3350/Sod Sulf,bicarb,cl/Kcl29 claims

Sodium, Potassium,mag Sulfates27 claims

QUALITY · MIPS · 2024

Final MIPS score

84.2

Quality

67.7

Cost

80.6

Improvement activities

40.0

Promoting interop.

99.0

Payment adjustment

0.39%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

No data available for this provider in 2025.

REFERRAL NETWORK

Where John Vainder's patients come from & go

Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 40 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
PRESENCE CHICAGO HOSPITALS NETWORK	364	938
Harsh Gupta Gastroenterology · Evanston, IL	108	216
Vishnu Gaiha Cardiology · Evanston, IL	104	205
Janis Atkinson Pathology · Evanston, IL	94	186
ENDEAVOR HEALTH CLINICAL OPERATIONS	69	191
City Of Chicago Ambulance Service Provider · Chicago, IL	52	91
Walter Glaws Gastroenterology · Gurnee, IL	49	92
NITITHAM, KAROON	46	104
Dorota Filipiuk Pathology · Evanston, IL	41	80
Judy Joseph Internal Medicine · Chicago, IL	38	198
Brian Huettl Emergency Medicine · Milwaukee, WI	38	65
DECIMO, AMANDA	36	83

Refers patients to

Outbound — where patients go next

No outbound pairs above the suppression threshold.

Source: CMS Physician Shared Patient Patterns (30-day window, Medicare FFS). Direction = a beneficiary seen by the first provider, then the second, within 30 days; a proxy for referral, not a documented referral. Pairs with fewer than 11 shared beneficiaries are suppressed.

CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore

OIG/SAM exclusion screening, sanctions history

Healthparse Signals

Monitor this provider for changes — dated NPI change events