NPI Portal NPI Lookup & Verification

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

Mr. Robert Mendel Breslow, R.PH.

Pharmacotherapy Pharmacist in Madison, WI · enumerated 2005.

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

National Provider Identifier

1962499665

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Registry record

Entity type Individual (Type 1)
Name Mr. Robert Mendel Breslow
Credential R.PH.
Sex Male
Practice address Madison, WI, 53705
Phone (608) 262-1416
Fax (608) 262-3397
Enumeration date Sep 29, 2005
Last updated in NPPES Jan 16, 2014

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

Taxonomy & licenses

1835P1200X Pharmacotherapy Pharmacist Pharmacy Service Providers · License 9005 (WI) Primary
RPH — Registered Pharmacist: A licensed pharmacist registered with a state board of pharmacy. About the RPH credential

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

Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Robert Breslow?
Robert Breslow is registered in NPPES with the primary taxonomy of Pharmacotherapy Pharmacist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-01-16.