Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Mary Williams, PHARMD
Pharmacist in Perryville, MD · enumerated 2015.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1164894556
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Registry record
Entity type Individual (Type 1)
Name Dr. Mary Williams
Credential PHARMD
Sex Female
Practice address 5319 Pulaski Hwy, Perryville, MD, 21903
Phone (410) 642-0003
Enumeration date Oct 23, 2015
Last updated in NPPES Oct 23, 2015
Taxonomy & licenses
PHARMD · Doctor of Pharmacy: A licensed pharmacist with a professional doctorate in pharmacy.
About the PHARMD 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.
Frequently asked questions
How do I verify Mary Williams's NPI record?
Cross-check NPI 1164894556 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1164894556 active?
Yes, as of the latest NPPES snapshot, NPI 1164894556 is active (record last updated 2015-10-23).
Other providers at this practice address
Browse all → Walgreen Co Pharmacy · Perryville, MD NPI 1851311369 Sheri Haupt Pharmacist · Perryville, MD NPI 1043594641 Ian Ponen Pharmacist · Perryville, MD NPI 1356625313 Aubry Tollenger Pharmacist · Perryville, MD NPI 1811240500 Shannan Young Pharmacist · Perryville, MD NPI 1760811566 Walgreen Co. Pharmacy · Perryville, MD NPI 1932954716
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-10-23.