Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Thomas Aloysius Mcdonald, MD

Orthopaedic Foot and Ankle Surgery Physician in Enfield, CT · enumerated 2006.

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

National Provider Identifier

1639139868

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Registry record

Entity type Individual (Type 1)

Name Thomas Aloysius Mcdonald

Credential MD

Sex Male

Practice address 7 Elm St Fl 3, Enfield, CT, 06082

Phone (413) 785-4666

Fax (413) 846-4756

Enumeration date Mar 23, 2006

Last updated in NPPES Jun 25, 2021

Taxonomy & licenses

207XX0004X Orthopaedic Foot and Ankle Surgery Physician Allopathic & Osteopathic Physicians · License M0815 (TX) 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
P00338922	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

How do I verify Thomas Mcdonald's NPI record?

Cross-check NPI 1639139868 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1639139868 active?

Yes, as of the latest NPPES snapshot, NPI 1639139868 is active (record last updated 2021-06-25).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-06-25.