John K. Bartnik, M.D.
Hematology & Oncology Physician · Saginaw, MI
John K. Bartnik, M.D. is a hematology & oncology physician with a practice address in Saginaw, Michigan, and NPI 1740211275, issued on Jul 5, 2006. Check the license (Michigan JB062933, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- John K. Bartnik
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- JB062933 MI
Self-reported in NPPES; status is on the state search - Practice location
- 5400 Mackinaw RD., Saginaw, MI 48604
- Phone
- (989) 791-2330
- Enumerated
- Jul 5, 2006
- Record last updated
- Mar 26, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (989) 791-2329
- Medicaid ID
- 4222419 MI
- Medicare enrollment
- Enrolled (PECOS I20091201000196); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 340 in Michigan → Look up another NPI →
Verify John K. Bartnik in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license JB062933Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
61% more Medicare Part D claims than the average hematology & oncology physician in 2024
1,410 Medicare Part D claims for 303 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 25% of claims. 26 claims were for opioids.
Most prescribed
- Anastrozole129 claims
- Prochlorperazine Maleate97 claims
- Letrozole86 claims
- Ondansetron Hcl84 claims
- Dexamethasone74 claims
- Revlimid57 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $714.79
29 payments; by number, the most common kind was food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 8,560 providers of this specialty with any payment received $7,481.41 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Oncology Hematology Associates OF Saginaw Valley, P.C.Saginaw, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John K. Bartnik among 340 hematology & oncology physician records in Michigan
John K. Bartnik, M.D. is one of 340 hematology & oncology physician records with a practice address in Michigan. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 14% of them.
- NPI issued2006 · 14% of these records are older, 59% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1983 · median 2004 among the 206 with a school on file
- Record last updated2021 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in Michigan
There are 340 hematology & oncology physician records in Michigan.
All 340 in Michigan → Every provider in Saginaw → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Ernie Balcueva, M.D.Saginaw, MI 486041154365252
- Syed Hassan, M.D.Saginaw, MI 486041992748701
- John Hughes, M.D.Saginaw, MI 486041437200920
- Laiba Khaliq, DOSaginaw, MI 486041437770120
- Bei Liu, MD, PHDSaginaw, MI 486041508887829
- Ahmed Abdel-Maksoud, MDMidland, MI 486401295917086
- Daniel Danso, MDMidland, MI 486401386639680
- Sharon Levandowski, MDMidland, MI 486401144244500
Common questions
What is John K. Bartnik, M.D.'s NPI number?
John K. Bartnik, M.D.'s National Provider Identifier (NPI) is 1740211275, issued on Jul 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John K. Bartnik, M.D. located?
The NPPES record lists a practice address at 5400 Mackinaw RD., Saginaw, MI, 48604. Phone: (989) 791-2330. Providers update this record themselves, so call before visiting.
How can I verify John K. Bartnik, M.D.'s license?
NPPES lists Michigan license number JB062933, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John K. Bartnik, M.D. prescribe under Medicare Part D?
In 2024, John K. Bartnik, M.D. had 1,410 Medicare Part D claims for 303 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is John K. Bartnik, M.D.'s MIPS final score?
The 2023 MIPS final score is 100 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.