Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Barbara Paula Illowsky Karp, M.D.
Neurology Physician in Bethesda, MD · enumerated 2009.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1174759138
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Dr. Barbara Paula Illowsky Karp
Credential M.D.
Sex Female
Practice address Nih Building 10 Rm Crc 6 5733, 9000 Rockville Pike, Bethesda, MD, 20892
Phone (301) 496-0150
Fax (301) 480-2973
Enumeration date Jun 4, 2009
Last updated in NPPES Jun 4, 2009
Taxonomy & licenses
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD 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
What is the NPI number for Barbara Karp?
The National Provider Identifier (NPI) for Barbara Karp is 1174759138, a Type 1 (individual) record in the CMS NPPES registry.
Where does Barbara Karp practice?
The practice location on file with NPPES is in Bethesda, MD. Providers can have multiple locations; NPPES lists the primary practice address.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-06-04.