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

Dr. Marc M Sadowsky, MD

Individual provider Psychiatry Physician · NPI 1558358689

Dr. Marc M Sadowsky, MD is a Psychiatry in Lawrence, Massachusetts. Graduated from Tufts University School of Medicine in 1985, 41 years ago. Practices with Lgh Medical Group, Inc, a 163-clinician group, works from 3 locations, accepts Medicare assignment and offers telehealth. Licensed in Massachusetts and New Hampshire.

Years since qualifying
41
Trained at
Tufts University School of Medicine
Licensed in
MA, NH
In the registry since
2005
Specialties on file
4
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

354 Merrimack St
Lawrence, MA 01843-1754
Phone: (978) 687-2321
Fax: (978) 685-7265
Show map & directions

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

Additional practice locations (2)

  • 168 Kinsley St, Nashua, NH 03060-3634 — (978) 687-2321
  • 70 Butler St, Salem, NH 03079-3925 — (978) 687-2321

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence 75226 (MA)
Psychiatry Physician Taxonomy 2084P0800X · Licence 8176 (NH)
Geriatric Psychiatry Physician Taxonomy 2084P0805X · Licence 75226 (MA)
Geriatric Psychiatry Physician Taxonomy 2084P0805X · Licence 8176 (NH)

Record details

NPI number1558358689
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 4, 2005
Last updated in NPPESMarch 4, 2020
Certification dateMarch 4, 2020
Mailing address354 Merrimack St, Lawrence, MA 01843-1754

Medicare enrollment

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

Medicare specialtyPSYCHIATRY
Medical schoolTUFTS UNIVERSITY SCHOOL OF MEDICINE
Graduated 1985 (41 years in practice)
Group practice Lgh Medical Group, Inc. — 163 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

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