Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. David A Bader, M.D.

Diagnostic Radiology Physician in Worcester, MA · enumerated 2006.

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

National Provider Identifier

1154376143

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. David A Bader

Credential M.D.

Sex Male

Practice address 123 Summer St, Worcester, MA, 01608

Phone (978) 939-2035

Fax (978) 939-2039

Enumeration date May 24, 2006

Last updated in NPPES Jul 31, 2016

Taxonomy & licenses

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 78860 (MA) Primary

207U00000X Nuclear Medicine Physician Allopathic & Osteopathic Physicians · License 78860 (MA) 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
042477296	Other	MA	UNITED HEALTH CARE
72313	Other	MA	CIGNA HEALTHPLAN
903988	Other	MA	HARVARD PILGRIM HEALTH CA
3141594	Other	MA	HEALTHY START
3141594	Medicaid	MA	-
78860	Other	MA	TUFTS HEALTH PLAN
2275963	Other	MA	AETNA
0007041	Other	MA	NEIGHBORHOOD HEALTH PLAN
40008	Other	MA	HEALTH NEW ENGLAND
7999	Other	MA	FALLON COMMUNITY HEALTH P
J16215	Other	MA	BLUE CROSS BLUE SHIELD
300070581	Other	MA	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 this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is David Bader?

David Bader is registered in NPPES with the primary taxonomy of Diagnostic Radiology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-07-31.