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

Mark Leo Timmerman, MD

Individual provider Family Medicine Physician · NPI 1972525574

Mark Leo Timmerman, MD is a Family Practice in Merrimack, New Hampshire. Graduated from University of Iowa, Rj & L Carver College of Medicine in 1984, 42 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in New Hampshire.

Years since qualifying
42
Trained at
University of Iowa, Rj & L Carver College of Medicine
Licensed in
NH
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

454 Daniel Webster Hwy
Merrimack, NH 03054-3699
Phone: (603) 424-8120
Fax: (603) 424-8140
Show map & directions

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

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence NH 7663 (NH)

Record details

NPI number1972525574
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJuly 24, 2006
Last updated in NPPESMarch 7, 2023
Mailing address454 Daniel Webster Hwy, Merrimack, NH 03054-3695

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolUNIVERSITY OF IOWA, RJ & L CARVER COLLEGE OF MEDICINE
Graduated 1984 (42 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Other providers in Merrimack