Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mark Drennan
Social Worker in Winfield, WV · enumerated 2024.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1497516702
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Registry record
Entity type Individual (Type 1)
Name Mark Drennan
Sex Male
Practice address 12086 Winfield Rd, Winfield, WV, 25213
Phone (304) 545-5290
Enumeration date Jan 23, 2024
Last updated in NPPES Jan 23, 2024
Taxonomy & licenses
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 Mark Drennan?
The National Provider Identifier (NPI) for Mark Drennan is 1497516702, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mark Drennan practice?
The practice location on file with NPPES is in Winfield, WV. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Estebania Llado-Frazer Case Manager/Care Coordinator · Winfield, WV NPI 1730250507 April Evans Case Manager/Care Coordinator · Winfield, WV NPI 1013511096 Michelle Hanchosky Case Manager/Care Coordinator · Winfield, WV NPI 1912598335 Benjamin Halley Case Manager/Care Coordinator · Winfield, WV NPI 1679292361 Zachry Miller Case Manager/Care Coordinator · Winfield, WV NPI 1003530684 Amber Houser Case Manager/Care Coordinator · Winfield, WV NPI 1023732229 Terrica Maxwell Social Worker · Winfield, WV NPI 1245955178 Mackenzie Reffitt Social Worker · Winfield, WV NPI 1265132641
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-01-23.