Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mr. Roy Vincent Castle Jr., R.PH., P.D.
Pharmacist in Rockville, MD · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1891815718
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Registry record
Entity type Individual (Type 1)
Name Mr. Roy Vincent Castle Jr.
Credential R.PH., P.D.
Sex Male
Practice address 5600 Fishers Ln, Hfd-13, Rockville, MD, 20857
Phone (240) 453-6689
Fax (240) 453-6685
Enumeration date Apr 2, 2007
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
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.
Frequently asked questions
How do I verify Roy Castle's NPI record?
Cross-check NPI 1891815718 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1891815718 active?
Yes, as of the latest NPPES snapshot, NPI 1891815718 is active (record last updated 2007-07-08).
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.