Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Charles I Haffajee, MD

Clinical Cardiac Electrophysiology Physician in Boston, MA · enumerated 2005.

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

National Provider Identifier

1952397523

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Registry record

Entity type Individual (Type 1)

Name Charles I Haffajee

Credential MD

Sex Male

Practice address 330 Brookline Ave, Cardiovascular Medicine, Boston, MA, 02215

Phone (617) 632-7521

Fax (617) 632-7533

Enumeration date Sep 20, 2005

Last updated in NPPES Aug 24, 2016

Taxonomy & licenses

207RC0001X Clinical Cardiac Electrophysiology Physician Allopathic & Osteopathic Physicians · License MH40601 (MA) 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
2053594	Medicaid	MA	-

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 1952397523 active?

Yes, as of the latest NPPES snapshot, NPI 1952397523 is active (record last updated 2016-08-24).

How do I verify Charles Haffajee's NPI record?

Cross-check NPI 1952397523 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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Maryjane Zimarowski Anatomic Pathology & Clinical Pathology Physician · Boston, MA NPI 1417954595 Carolyn Zelop Maternal & Fetal Medicine Physician · Boston, MA NPI 1376541458 Christine Bryke Clinical Cytogenetics Physician · Boston, MA NPI 1932109527 Maureen Oshea Nurse Practitioner · Boston, MA NPI 1447244694 Jason Wakakuwa Anesthesiology Physician · Boston, MA NPI 1356337554 Louis Caplan Neurology Physician · Boston, MA NPI 1306833561 Joerg Oettgen Cardiovascular Disease Physician · Boston, MA NPI 1073500997 John Pawlowski Anesthesiology Physician · Boston, MA NPI 1548257314

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-08-24.