Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Thomas V.P. Alpren, M.D.

Cornea and External Diseases Specialist Physician in Milwaukee, WI · enumerated 2005.

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

National Provider Identifier

1508853474

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Registry record

Entity type Individual (Type 1)

Name Thomas V.P. Alpren

Credential M.D.

Sex Male

Practice address 2500 W Layton Ave, Suite 110, Milwaukee, WI, 53221

Phone (414) 281-0963

Fax (414) 281-0959

Enumeration date Oct 5, 2005

Last updated in NPPES Mar 5, 2019

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 19057-020 (WI) Secondary

207WX0120X Cornea and External Diseases Specialist Physician Allopathic & Osteopathic Physicians · License 19057-020 (WI) 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
000147365	Other	WI	MEDICARE LEGACY NUMBER
0800018	Other	WI	PRIMECARE
391484998	Other	WI	TAX ID
000147370	Other	WI	MEDICARE LEGACY #
30432900	Medicaid	WI	-
180012111	Other	WI	RR MEDICARE
391484998011	Other	WI	BC/CCARE
391484998A	Other	WI	HUMANA

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 Thomas Alpren?

The National Provider Identifier (NPI) for Thomas Alpren is 1508853474, a Type 1 (individual) record in the CMS NPPES registry.

Where does Thomas Alpren practice?

The practice location on file with NPPES is in Milwaukee, WI. 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 2019-03-05.