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

Dr. Mark Douglas Ensberg, MD

Individual provider Geriatric Medicine (Internal Medicine) Physician · NPI 1912936527

Dr. Mark Douglas Ensberg, MD is an Internal Medicine in Holt, Michigan. Graduated from Sanford School of Medicine of University of South Dakota in 1981, 45 years ago. Practices with Msu Health Care Inc, a 201-clinician group and accepts Medicare assignment. Licensed in Michigan.

Years since qualifying
45
Trained at
Sanford School of Medicine of University of South Dakota
Licensed in
MI
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

5091 Willoughby Rd
Holt, MI 48842-1054
Phone: (517) 694-2144
Fax: (517) 694-6570
Show map & directions

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

Specialties & licences

Geriatric Medicine (Internal Medicine) Physician (primary) Taxonomy 207RG0300X · Licence 4301048610 (MI)

Record details

NPI number1912936527
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 3, 2006
Last updated in NPPESJune 12, 2019
Mailing address804 Service Rd Ste A109b, East Lansing, MI 48824-7015

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesGERIATRIC MEDICINE
Medical schoolSANFORD SCHOOL OF MEDICINE OF UNIVERSITY OF SOUTH DAKOTA
Graduated 1981 (45 years in practice)
Group practice Msu Health Care Inc. — 201 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount