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

Walter J Alt, MD

Individual provider Family Medicine Physician · NPI 1831147073

Walter J Alt, MD is a Family Medicine Physician in Merrimac, Massachusetts. Licensed in Massachusetts. Registered with an NPI since 2006.

Licensed in
MA
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

5 E Main Street Lahey Merrimac
Merrimac, MA 01860
Phone: (978) 346-9733
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 81973 (MA)

Record details

NPI number1831147073
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 4, 2006
Last updated in NPPESDecember 13, 2011
Mailing address5 East Main Street, Lahey Merrimac, Merrimac, MA 01860

Other providers in Merrimac