Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Chul Joong Oh, RPH
Pharmacist in Leesburg, VA · enumerated 2020.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1659974541
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Registry record
Entity type Individual (Type 1)
Name Chul Joong Oh
Credential RPH
Sex Male
Practice address 1200 Edwards Ferry Rd Ne, Leesburg, VA, 20176
Phone (703) 777-8059
Fax (571) 442-5299
Enumeration date Nov 21, 2020
Last updated in NPPES Nov 21, 2020
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
Is NPI 1659974541 active?
Yes, as of the latest NPPES snapshot, NPI 1659974541 is active (record last updated 2020-11-21).
How do I verify Chul Joong Oh's NPI record?
Cross-check NPI 1659974541 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all → Fredrick Eye Care Optometrist · Leesburg, VA NPI 1538135637 Virginia Cvs Pharmacy LLC Pharmacy · Leesburg, VA NPI 1285656967 Luxottica of America Inc. Eyewear Supplier · Leesburg, VA NPI 1164574133 Marsha Gage Optometrist · Leesburg, VA NPI 1083888333 Vyvy Pham Optometrist · Leesburg, VA NPI 1881822690 Kathleen Silver Pharmacist · Leesburg, VA NPI 1629362660 Freda Neiler Pharmacist · Leesburg, VA NPI 1356636526 Melissa Palmer Pharmacist · Leesburg, VA NPI 1437445285
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-11-21.