Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Eric M Mazur, M.D.

Hematology (Internal Medicine) Physician in Norwalk, CT · enumerated 2006.

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

National Provider Identifier

1881664886

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Registry record

Entity type Individual (Type 1)

Name Dr. Eric M Mazur

Credential M.D.

Sex Male

Practice address 24 Stevens St, Norwalk, CT, 06850

Phone (203) 852-2368

Fax (203) 855-3589

Enumeration date Jan 24, 2006

Last updated in NPPES Nov 9, 2015

Taxonomy & licenses

207RH0000X Hematology (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 021096 (CT) Primary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 021096 (CT) 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
OV5808	Other	CT	HEALTHNET
2543585	Other	CT	AETNA PROVIDER NUMBER
010021096CT01	Other	CT	ANTHEM B/C
213321	Other	CT	UHC
ZS925	Other	CT	OXFORD
001210963	Medicaid	DE	-
6893765-007	Other	CT	CITNA
210960	Other	CT	CONNECTICARE

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.

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Frequently asked questions

How do I verify Eric Mazur's NPI record?

Cross-check NPI 1881664886 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1881664886 active?

Yes, as of the latest NPPES snapshot, NPI 1881664886 is active (record last updated 2015-11-09).

Other providers at this practice address

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James Babashak Anesthesiology Physician · Norwalk, CT NPI 1932102803 Tammy Mahroos Certified Registered Nurse Anesthetist · Norwalk, CT NPI 1235132093 Garrett Nguyen Anesthesiology Physician · Norwalk, CT NPI 1740283621 Carolyn Mastroni Certified Registered Nurse Anesthetist · Norwalk, CT NPI 1316940166 Linda Versea Adult Health Nurse Practitioner · Norwalk, CT NPI 1861495681 Janet Segen Certified Registered Nurse Anesthetist · Norwalk, CT NPI 1083617831 Eve Zacharakos Certified Registered Nurse Anesthetist · Norwalk, CT NPI 1144223991 Lucia Vigna Anesthesiology Physician · Norwalk, CT NPI 1104829076

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-11-09.