Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Thomas Joseph Grady, M.D.,

Surgery Physician in Waltham, MA · enumerated 2005.

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

National Provider Identifier

1518949346

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Registry record

Entity type Individual (Type 1)

Name Thomas Joseph Grady

Credential M.D.,

Sex Male

Practice address Waltham, MA, 02453

Phone (781) 893-6520

Fax (781) 893-6522

Enumeration date Nov 17, 2005

Last updated in NPPES May 20, 2015

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License A34515 (MA) Primary

2086S0129X Vascular Surgery Physician Allopathic & Osteopathic Physicians · License 34153 (MA) Secondary

208C00000X Colon & Rectal Surgery Physician Allopathic & Osteopathic Physicians · License 34153 (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
2019701	Medicaid	MA	-
AX0126	Other	-	MEDICARE PTAN
020909149	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.

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Frequently asked questions

How do I verify Thomas Grady's NPI record?

Cross-check NPI 1518949346 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1518949346 active?

Yes, as of the latest NPPES snapshot, NPI 1518949346 is active (record last updated 2015-05-20).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-05-20.