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

Mark C. Nitzberg, PC

Organization Internal Medicine Physician · NPI 1992900013

Mark C. Nitzberg, PC is an Internal Medicine Physician in Methuen, Massachusetts. Works from 2 locations. Licensed in Massachusetts.

Licensed in
MA
In the registry since
2007
Specialties on file
2
What do these letters mean?
PC — Professional corporation
A form of business registration, not a clinical qualification.

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Practice location Address checks out

380 R Merrimack St Ste 2C
Methuen, MA 01844
Phone: (978) 681-1977
Fax: (978) 686-8918
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 411 Merrimack St, Methuen, MA 01844-5821 — (978) 681-1977

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 74584 (MA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 74584 (MA)

Record details

NPI number1992900013
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Mark Nitzberg — President · (978) 681-1977
NPI enumeratedJune 19, 2007
Last updated in NPPESNovember 15, 2017
Mailing address380 R Merrimack St., Ste. 2c, Methuen, MA 01844

Other providers in Methuen