Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Darnell W Day, MS
Counselor in Phila, PA · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1083734834
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Registry record
Entity type Individual (Type 1)
Name Darnell W Day
Credential MS
Sex Male
Practice address 112 N Broad St, Phila, PA, 19102
Phone (215) 568-0860
Fax (215) 568-0769
Enumeration date Mar 29, 2007
Last updated in NPPES Jul 8, 2007
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 Darnell Day?
The National Provider Identifier (NPI) for Darnell Day is 1083734834, a Type 1 (individual) record in the CMS NPPES registry.
Where does Darnell Day practice?
The practice location on file with NPPES is in Phila, PA. Providers can have multiple locations; NPPES lists the primary practice address.
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.