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

Alan Janssen, DO

Individual provider Emergency Medicine Physician · NPI 1124001011

Alan Janssen, DO practises Emergency Medicine in Grand Blanc, Michigan. Graduated from At Still University of Health Sciences, College of Osteo Med, Kirksville in 1989, 37 years ago. Practices with Observation Medicine Group PLLC, a 28-clinician group and accepts Medicare assignment. Licensed in Michigan.

Years since qualifying
37
Trained at
At Still University of Health Sciences, College of Osteo Med, Kirksville
Licensed in
MI
In the registry since
2005
Specialties on file
2
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.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

1 Genesys Pkwy
Grand Blanc, MI 48439-8065 Not confirmed with CMS for 18 years — call before visiting
Phone: (810) 606-6137
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Specialties & licences

Emergency Medical Services (Emergency Medicine) Physician (primary) Taxonomy 207PE0004X · Licence 5101010657 (MI)
Emergency Medicine Physician Taxonomy 207P00000X · Licence 5101010657 (MI)

Record details

NPI number1124001011
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedNovember 23, 2005
Last updated in NPPESMarch 6, 2008

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolAT STILL UNIVERSITY OF HEALTH SCIENCES, COLLEGE OF OSTEO MED, KIRKSVILLE
Graduated 1989 (37 years in practice)
Group practice Observation Medicine Group Pllc — 28 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients114
Services billed 122 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

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.

Colleagues at Observation Medicine Group PLLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 28 clinicians in the practice; 12 are shown here.

Other providers in Grand Blanc