Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Thomas C Johnston, MD

Pediatrics Physician in Hanover, MA · enumerated 2005.

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

National Provider Identifier

1073504445

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Registry record

Entity type Individual (Type 1)

Name Mr. Thomas C Johnston

Credential MD

Sex Male

Practice address 51 Mill St, Building E - 17, Hanover, MA, 02339

Phone (781) 826-2131

Fax (781) 826-4513

Enumeration date Nov 3, 2005

Last updated in NPPES May 2, 2012

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 50326 (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
J02075	Other	MA	BCBS
1200530	Other	-	UNITED
3093182	Medicaid	MA	-
20961	Other	MA	HPHC
050326	Other	-	TUFTS
3552816	Other	-	CIGNA

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 1073504445 active?

Yes, as of the latest NPPES snapshot, NPI 1073504445 is active (record last updated 2012-05-02).

How do I verify Thomas Johnston's NPI record?

Cross-check NPI 1073504445 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 2012-05-02.