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

Dr. Arun Chaudhary, M.D.

Internal Medicine Physician in Cambridge, MA · enumerated 2006.

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

National Provider Identifier

1255371043

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Registry record

Entity type Individual (Type 1)

Name Dr. Arun Chaudhary

Credential M.D.

Sex Male

Practice address Cambridge, MA, 02138

Phone (617) 876-4344

Enumeration date Jun 8, 2006

Last updated in NPPES Jan 26, 2012

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

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 224431 (MA) Primary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 12417 (NH) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 11365 (HI) Secondary

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 12417 (NH) Secondary

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
01Y009920NH03	Other	NH	ANTHEM BCBS NH
2161141	Medicaid	MA	-
5166278	Other	NH	CIGNA
AA112185	Other	NH	HARVARD
30204849	Medicaid	NH	-
P00673100	Other	NH	RAILROAD MEDICARE

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

Is NPI 1255371043 active?

Yes, as of the latest NPPES snapshot, NPI 1255371043 is active (record last updated 2012-01-26).

How do I verify Arun Chaudhary's NPI record?

Cross-check NPI 1255371043 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-01-26.