NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Nauman A Diwan, MD

Internal Medicine Physician in Hamilton, NJ · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1609802057

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Nauman A Diwan
Credential MD
Sex Male
Practice address Hamilton, NJ, 08619
Phone (609) 587-6661
Fax (609) 528-8891
Enumeration date Jun 25, 2006
Last updated in NPPES Apr 30, 2021

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

173000000X Legal Medicine Other Service Providers · License 25MA06535300 (NJ) Secondary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 25MA06535300 (NJ) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
1346499217 Other NJ NPI

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 → Validate an NPI →

Frequently asked questions

Where does Nauman Diwan practice?
The practice location on file with NPPES is in Hamilton, NJ. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Nauman Diwan?
The National Provider Identifier (NPI) for Nauman Diwan is 1609802057, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-04-30.