What is John Bartnik's specialty?

John Bartnik (NPI 1740211275) is a Medicare-billing provider whose primary specialty is Hematology-Oncology in Saginaw, MI.

Where does John Bartnik practice?

John Bartnik practices in Saginaw, MI, based on the location reported in the CMS Medicare provider datasets for NPI 1740211275.

How much does Medicare pay John Bartnik?

John Bartnik (NPI 1740211275) received approximately $1.2M in total Medicare Part B payments, serving 416 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1740211275

John BartnikM.D.

PRACTICEONCOLOGY HEMATOLOGY ASSOCIATES OF SAGINAW VALLEY PCSee all providers at this practice →

Hematology-OncologySaginaw, MII

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

1,160

Unique beneficiaries

—

Total services

21,247

Distinct HCPCS

Medicare payment

$382K

Peer benchmark

Total Medicare services vs. 228 Hematology-Oncology providers in MI — top quintile (cohort median 844).

PRESCRIBING · PART D · 2024

Total Rx claims

1,226

Beneficiaries

—

Total drug cost

$5.2M

Distinct drugs

Brand share

25.4%

Top prescribed drugs

Anastrozole129 claims

Prochlorperazine Maleate97 claims

Letrozole86 claims

Ondansetron Hcl84 claims

Dexamethasone74 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$996

Payment records

By payment type

Food and Beverage$973

Education$23

Top paying entities

Food and Beverage$973

Education$23

FACILITY AFFILIATIONS

Hospital & Facility Affiliations (5)

Hospital

Hospital

Hospital

Hospital

Hospital

REFERRAL NETWORK

Where John Bartnik'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). 82 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Peter Lassing Diagnostic Radiology · Grand Rapids, MI	140	955
Prakash Varadarajan Hematology-Oncology · Kirkland, WA	122	1,894
Amy Doornbos Physician Assistant · Saginaw, MI	114	1,811
Mobile Medical Response Inc Ambulance Service Provider · Saginaw, MI	108	722
Kristin Nelsen Interventional Cardiology · Grand Rapids, MI	102	781
SCHEURER HOSPITAL	99	1,744
MCLAREN CARO REGION	98	1,424
Chirdeep Bhutani Interventional Radiology · Sacramento, CA	84	537
Mark Ludka Diagnostic Radiology · Saginaw, MI	80	322
Nasser Qadri Interventional Radiology · Fort Wayne, IN	77	552
Gerard Farrar Interventional Radiology · Grand Rapids, MI	74	347
QUEST DIAGNOSTICS INCORPORATED MI	73	384

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