Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Jacob Michael Hamaker, DO

Individual provider Family Medicine Physician · NPI 1194420422

Jacob Michael Hamaker, DO is a Family Medicine Physician in Indianapolis, Indiana. Works from 3 locations. Licensed in Illinois, Indiana and Wisconsin.

Licensed in
IL, IN, WI
In the registry since
2023
Specialties on file
4
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

3076 Armory Dr
Indianapolis, IN 46208-5080
Phone: (815) 520-7470
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 5605 E Rockton Rd, Roscoe, IL 61073-7641 — (815) 525-4500
  • 1905 E Huebbe Pkwy, Beloit, WI 53511-1842 — (608) 364-5011

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 8214221 (WI)
Family Medicine Physician Taxonomy 207Q00000X · Licence 336133147 (IL)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X · Licence 11023127A (IN)

Record details

NPI number1194420422
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedApril 4, 2023
Last updated in NPPESSeptember 2, 2026
Certification dateSeptember 2, 2026

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $402 20 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

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