Mark C. Nitzberg, P.C.
NPI 1992900013 · Gastroenterology Physician · Methuen, MA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark C. Nitzberg, P.C. is a Gastroenterology Physician organization in Methuen, MA (NPI 1992900013).
Provider details
- NPI number
- 1992900013
- Entity type
- Organization
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Mark Nitzberg, President(978) 681-1977
- License
- 74584 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Additional practice locations (1)
- 411 Merrimack StSuite 202Methuen, MA 01844-5821Phone: (978) 681-1977Fax: (978) 686-8918
Registry dates
- Enumerated
- 2007-06-19
- Last updated
- 2017-11-15
Frequently asked questions
- What is Mark C. Nitzberg, P.C.'s NPI number?
- Mark C. Nitzberg, P.C.'s National Provider Identifier (NPI) is 1992900013, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Mark C. Nitzberg, P.C.?
- Mark C. Nitzberg, P.C. is classified in the NPPES registry as Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark C. Nitzberg, P.C. located?
- Mark C. Nitzberg, P.C.'s practice location on file with NPPES is 380 R Merrimack St., Methuen, MA 01844.
- What is Mark C. Nitzberg, P.C.'s phone number?
- The practice phone number listed in the NPPES registry for Mark C. Nitzberg, P.C. is (978) 681-1977.
- Does Mark C. Nitzberg, P.C. accept Medicare?
- Mark C. Nitzberg, P.C. is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Mark C. Nitzberg, P.C.?
- The authorized official listed on Mark C. Nitzberg, P.C.'s NPPES record is Mark Nitzberg, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Mark C. Nitzberg, P.C.'s NPI active?
- Yes — Mark C. Nitzberg, P.C.'s NPI (1992900013) is active in the NPPES registry as of the last update on 2017-11-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.