Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Jonathan Paul Harding, M.D.

Geriatric Medicine (Internal Medicine) Physician in Chelmsford, MA · enumerated 2006.

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

National Provider Identifier

1548295330

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Registry record

Entity type Individual (Type 1)

Name Jonathan Paul Harding

Credential M.D.

Sex Male

Practice address 228 Billerica Rd, Chelmsford, MA, 01824

Phone (978) 250-6000

Fax (978) 250-6460

Enumeration date Jul 11, 2006

Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 155720 (MA) Secondary

207RG0300X Geriatric Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 155720 (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
J22786	Other	MA	BLUE CROSS
0036817	Other	MA	NEIGHBORHOOD HEALTH
AA45950	Other	MA	HARVARD PILGRIM
2112639	Medicaid	MA	-
494336	Other	MA	TUTTS

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 Jonathan Harding?

The National Provider Identifier (NPI) for Jonathan Harding is 1548295330, a Type 1 (individual) record in the CMS NPPES registry.

Where does Jonathan Harding practice?

The practice location on file with NPPES is in Chelmsford, 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 2025-09-11.