Data from the NPPES registry. May not reflect recent changes — verify at nppes.cms.hhs.gov.
DR. WILLIAM GRANT DAY, M.D.
Active Sole ProprietorDR. WILLIAM GRANT DAY, M.D. is a Allergy & Immunology healthcare provider located in PORTSMOUTH, Virginia. NPI 1740745041 is currently active in the NPPES registry. Verify at CMS.
Allergy & Immunology · PORTSMOUTH, VA
Registration Details
- NPI Number
- 1740745041
- Provider Type
- Individual
- Gender
- Male
- NPI Issued
- Jan 31, 2019 (7.557411245636 yrs)
- Last Updated
- Jun 18, 2025
- Licenses
-
0101271195 (VA)0101271195 (VA)
- Sole Proprietor
- Yes
Practice Information
- Address
-
620 JOHN PAUL JONES CIR STE 275PORTSMOUTH, VA, 237082197Browse VA providers · Browse ZIP 23708
- Phone
- 7579532000
- Primary Specialty
-
Allergy & Immunology
207K00000X
- Additional Specialty
- Allergy & Immunology
Data sourced from the NPPES National Provider Identifier registry. This information is for informational purposes only and is not a substitute for verifying credentials with the appropriate licensing authority. For official verification, use the NPPES NPI Registry or the relevant state medical board.