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

Dr. James P Twesten-Otoole, MD

Individual provider Family Medicine Physician · NPI 1174599344

Dr. James P Twesten-Otoole, MD practises Addiction Medicine in Norton Shores, Michigan. Graduated from University of Michigan Medical School in 1998, 28 years ago. Practices with Mercy Physician Network, a 110-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Michigan.

Years since qualifying
28
Trained at
University of Michigan Medical School
Licensed in
MI
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

3570 Henry St Ste 220
Norton Shores, MI 49441
Phone: (616) 685-6920
Fax: (231) 672-7717
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Addiction Medicine (Family Medicine) Physician (primary) Taxonomy 207QA0401X · Licence 4301072802 (MI)
Family Medicine Physician Taxonomy 207Q00000X · Licence 4301072802 (MI)

Record details

NPI number1174599344
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 27, 2006
Last updated in NPPESJuly 11, 2023
Certification dateJuly 11, 2023

Medicare enrollment

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

Medicare specialtyADDICTION MEDICINE
Also practisesFAMILY PRACTICE
Medical schoolUNIVERSITY OF MICHIGAN MEDICAL SCHOOL
Graduated 1998 (28 years in practice)
Group practice Mercy Physician Network — 110 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients14
Services billed 145 a service is one billed item, such as a visit, a test or a procedure
Average patient age63

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

  • Trinity Health Muskegon Hospital Hospital · Muskegon, MI

Colleagues at Mercy Physician Network

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 110 clinicians in the practice; 12 are shown here.

Other providers in Norton Shores