Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Donald E. Factor, M.D.

Diagnostic Radiology Physician in Bangor, ME · enumerated 2006.

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

National Provider Identifier

1528158235

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Registry record

Entity type Individual (Type 1)

Name Donald E. Factor

Credential M.D.

Sex Male

Practice address 489 State St, Bangor, ME, 04401

Phone (207) 973-8305

Enumeration date Oct 13, 2006

Last updated in NPPES Jul 13, 2007

Taxonomy & licenses

2085B0100X Body Imaging Physician Allopathic & Osteopathic Physicians · License 008714 (ME) Secondary

2085N0700X Neuroradiology Physician Allopathic & Osteopathic Physicians · License 008714 (ME) Secondary

2085N0904X Nuclear Radiology Physician Allopathic & Osteopathic Physicians · License 008714 (ME) Secondary

2085P0229X Pediatric Radiology Physician Allopathic & Osteopathic Physicians · License 008714 (ME) Secondary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 008714 (ME) Primary

2085R0203X Therapeutic Radiology Physician Allopathic & Osteopathic Physicians · License 008714 (ME) Secondary

2085R0204X Vascular & Interventional Radiology Physician Allopathic & Osteopathic Physicians · License 008714 (ME) Secondary

2085U0001X Diagnostic Ultrasound Physician Allopathic & Osteopathic Physicians · License 008714 (ME) 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
024281	Other	ME	ANTHEM
0005375014	Other	ME	AETNA/USHC
M8526	Other	ME	CIGNA
AA16573	Other	ME	HPHC
2323431	Other	ME	AETNA

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 1528158235 active?

Yes, as of the latest NPPES snapshot, NPI 1528158235 is active (record last updated 2007-07-13).

How do I verify Donald Factor's NPI record?

Cross-check NPI 1528158235 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 2007-07-13.