NPI Portal NPI Lookup & Verification

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

Frank Donald Mackowiak, RPH

Pharmacist in Cardiff, MD · enumerated 2019.

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

National Provider Identifier

1083174783

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Frank Donald Mackowiak
Credential RPH
Sex Male
Practice address Cardiff, MD, 21160
Phone (410) 452-9799
Enumeration date Mar 20, 2019
Last updated in NPPES Jun 11, 2019

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

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 10548 (MD) Primary
RPH · Registered Pharmacist: A licensed pharmacist registered with a state board of pharmacy. About the RPH credential

Other identifiers

Identifier Type State Issuer
10548 Other MD MARYLAND BOARD OF PHARMACY

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

Where does Frank Mackowiak practice?
The practice location on file with NPPES is in Cardiff, MD. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Frank Mackowiak?
The National Provider Identifier (NPI) for Frank Mackowiak is 1083174783, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-06-11.