Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Timothy A Johnson, M.D.

Hematology & Oncology Physician in Springfield, MA · enumerated 2005.

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

National Provider Identifier

1801879762

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Registry record

Entity type Individual (Type 1)

Name Timothy A Johnson

Credential M.D.

Sex Male

Practice address 271 Carew Street, Springfield, MA, 01104

Phone (413) 748-7370

Fax (413) 748-7221

Enumeration date Nov 23, 2005

Last updated in NPPES Apr 10, 2014

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 220236 (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
2062330	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

What is the NPI number for Timothy Johnson?

The National Provider Identifier (NPI) for Timothy Johnson is 1801879762, a Type 1 (individual) record in the CMS NPPES registry.

Where does Timothy Johnson practice?

The practice location on file with NPPES is in Springfield, MA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-04-10.