Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Medical Office of John Vassallo MD PLLC

Organization Internal Medicine Physician · NPI 1487712121

Medical Office of John Vassallo MD PLLC is an Internal Medicine Physician in Howell, Michigan. Licensed in Michigan. Registered with an NPI since 2006.

Licensed in
MI
In the registry since
2006
What do these letters mean?
PLLC — Professional limited liability company
A form of business registration, not a clinical qualification.

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Practice location Address checks out

4354 E Grand River Ave
Howell, MI 48843-8554
Phone: (517) 540-0709
Fax: (517) 540-1775
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 4301078585 (MI)

Record details

NPI number1487712121
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official John Vassallo — Owner · (517) 548-0010
NPI enumeratedDecember 5, 2006
Last updated in NPPESApril 13, 2026
Certification dateApril 13, 2026
Mailing address4354 E Grand River Ave, Howell, MI 48843-8554

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