Grand Traverse Internists, PC in Traverse City, MI
This organization bills under NPI 1578559365, an organization record issued on Sep 27, 2005 with the primary taxonomy Internal Medicine Physician. Each clinician who works there has their own NPI and license.
Organization recordNPPES, Aug 2026
1578559365
- Legal name
- Grand Traverse Internists, PC
- Entity
- Type 2 · organization
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- Practice location
- 5015 N. ROYAL DRIVE, Traverse City, MI 49684
- Phone
- 231-935-0850
- Enumerated
- Sep 27, 2005
- Record updated
- Feb 18, 2011
- Authorized official
- President (title as filed)
8 clinicians CMS lists with Grand Traverse Internists in Traverse City
- Marci Bultemeier, DOInternal Medicine Physician1366402596
- Elizabeth Hughes, DOFamily Medicine Physician1811943723
- Charles Klettner, MDInternal Medicine Physician1760441646
- Janine Kohler, DOFamily Medicine Physician1194770347
- Jessica Mastbergen, NPAdult Health Nurse Practitioner1023501699
- David Oakley, MDInternal Medicine Physician1578523700
- Jason Schreiber, DOFamily Medicine Physician1568091874
- Jill Vollbrecht, MDEndocrinology, Diabetes & Metabolism Physician1013130525
Source: CMS Doctors and Clinicians group affiliations, matched by practice name and city.
Checking an organization
- Confirm the business with the Michigan secretary of state.
- Check the HHS-OIG exclusion list for the organization.
- Verify each clinician on their own record and the state license search.
Common questions
Is an organization NPI a license?
No. An NPI identifies who bills. Facilities and the clinicians who work there are licensed separately by the state.
Source: CMS National Plan and Provider Enumeration System (NPPES), monthly file of Aug 9, 2026 (NPPES files on CMS.gov). An NPI identifies who bills; it is not a license.