Mark C. Nitzberg, P.C.
Mark C. Nitzberg, P.C. is a healthcare organization registered as Gastroenterology Physician in Methuen, MA, holding Type 2 (organization) NPI 1992900013 since 2007. The authorized official on file is Mark Nitzberg, President.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1992900013 |
|---|---|
| Entity type | Organization (Type 2) |
| Legal business name | Mark C. Nitzberg, P.C. |
| Practice address | 380 R MERRIMACK ST., STE. 2C, Methuen, MA, 01844 |
| Phone | 9786811977 |
| Fax | 9786868918 |
| Enumeration date | 2007-06-19 |
| Last updated in NPPES | 2017-11-15 |
Authorized official
| Name | Mark Nitzberg |
|---|---|
| Title | President |
| Phone | 9786811977 |
Taxonomy & classification
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 207R00000X | Internal Medicine Physician | Secondary | 74584 | MA |
| 207RG0100X | Gastroenterology Physician | Primary | 74584 | MA |
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 9781480 | Medicaid | MA | — |
Copy-ready billing details
Provider: Mark C. Nitzberg, P.C. NPI: 1992900013 Taxonomy: 207RG0100X (Gastroenterology Physician) Address: 380 R MERRIMACK ST., STE. 2C, Methuen, MA, 01844
Verify this record
Cross-check NPI 1992900013 against the authoritative CMS record: view Mark C. Nitzberg, P.C. on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
What type of organization is Mark C. Nitzberg, P.C.?
What is a Type 2 NPI?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2017-11-15.