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

Joel William Knaack, DO

Individual provider Internal Medicine Physician · NPI 1841236460

Joel William Knaack, DO is an Internal Medicine in Traverse City, Michigan. Qualified in 2006, 20 years ago. Practices with North Michigan Physician Services PC, a 66-clinician group and accepts Medicare assignment. Licensed in Michigan.

Years since qualifying
20
Licensed in
MI
In the registry since
2006
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

1105 Sixth St
Traverse City, MI 49684-2349
Phone: (231) 935-5000
Fax: (231) 346-6017
Show map & directions

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 5101016880 (MI)

Record details

NPI number1841236460
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJune 21, 2006
Last updated in NPPESAugust 1, 2016
Mailing addressPo Box 27127, Lansing, MI 48909-7127

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2006 (20 years in practice)
Group practice North Michigan Physician Services Pc — 66 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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