What is Keith Obstein's specialty?

Keith Obstein (NPI 1528122595) is a Medicare-billing provider whose primary specialty is Gastroenterology in Nashville, TN.

Where does Keith Obstein practice?

Keith Obstein practices in Nashville, TN, based on the location reported in the CMS Medicare provider datasets for NPI 1528122595.

How much does Medicare pay Keith Obstein?

Keith Obstein (NPI 1528122595) received approximately $27K in total Medicare Part B payments, serving 146 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1528122595

Keith ObsteinMD, MPH

PRACTICEVANDERBILT UNIVERSITYSee all providers at this practice →

GastroenterologyNashville, TNI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

168

Unique beneficiaries

—

Total services

175

Distinct HCPCS

Medicare payment

$19K

Peer benchmark

Total Medicare services vs. 258 Gastroenterology providers in TN — bottom quintile (cohort median 809).

PRESCRIBING · PART D · 2024

Total Rx claims

287

Beneficiaries

—

Total drug cost

$22K

Distinct drugs

Brand share

54.7%

Top prescribed drugs

Peg3350/Sod Sulf,bicarb,cl/Kcl79 claims

Omeprazole65 claims

Peg3350/Sod Sulf,bicarb,cl/Kcl43 claims

Pantoprazole Sodium29 claims

Esomeprazole Magnesium14 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

No data available for this provider in 2025.

REFERRAL NETWORK

Where Keith Obstein'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). 5 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
VANDERBILT UNIVERSITY MEDICAL CENTER	147	548
Meera Chandrashekar Anesthesiology · Nashville, TN	16	30
Chanjuan Shi Pathology · Nashville, TN	15	30
MCDONALD, EDWARD	13	26
Adam Guttentag Diagnostic Radiology · Nashville, TN	12	19

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