Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

John K Bartnik, MD

Individual provider Hematology & Oncology Physician · NPI 1740211275

John K Bartnik, MD is a Hematology/Oncology in Saginaw, Michigan. Qualified in 1983, 43 years ago. Practices with Oncology Hematology Associates of Saginaw Valley, PC, a 4-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Michigan.

Years since qualifying
43
Licensed in
MI
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

5400 Mackinaw Rd Ste 4200
Saginaw, MI 48604-9533
Phone: (989) 791-2330
Fax: (989) 791-2329
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 2050 E Caro Rd, Caro, MI 48723-9320 — (989) 672-5001
  • 2431 S M 30, West Branch, MI 48661-9351 — (989) 343-2487

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence JB062933 (MI)

Record details

NPI number1740211275
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 5, 2006
Last updated in NPPESMarch 26, 2021
Certification dateMarch 26, 2021
Mailing address5400 Mackinaw Rd., Suite 4200, Saginaw, MI 48604-9533

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyHEMATOLOGY/ONCOLOGY
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1983 (43 years in practice)
Group practice Oncology Hematology Associates Of Saginaw Valley, P.C. — 4 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Saginaw