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MEDICAL OFFICE OF JOHN VASSALLO MD PLLC
NPI 1487712121
Internal Medicine in Howell, MI

Active since December 05, 2006CLIA Certified · 2 labs
4354 E GRAND RIVER AVE, HOWELL, MI 48843(517) 540-0709(517) 540-1775 Get Directions Write a Review

NPPES record last updated: April 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Apr 13, 2026, May 11, 2023, Mar 7, 2023 (3 updates tracked since 2023).

About Medical Office Of John Vassallo Md Pllc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MEDICAL OFFICE OF JOHN VASSALLO MD PLLC (NPI 1487712121) is a healthcare organization registered as an internal medicine in Howell, Michigan and active in the NPI registry since December 2006. The organization holds 2 active CLIA laboratory certificates and lists John C Vassallo, Owner, as its authorized official.

NPPES Registry Identity

NPI1487712121
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameMEDICAL OFFICE OF JOHN VASSALLO MD PLLC
Location Address4354 E GRAND RIVER AVEHowell, MI 48843-8554
Mailing Address4354 E Grand River AveHowell, MI 48843-8554 · (517) 540-0709 · Fax (517) 540-1775
Phone(517) 540-0709
Fax(517) 540-1775
Organization SubpartNo
Authorized OfficialJohn C VassalloOwner · (517) 548-0010
Enumeration DateDecember 5, 2006
Last NPPES UpdateApril 13, 20263 updates tracked since enumeration
NPPES CertifiedApril 13, 2026
✔ NPI 1487712121 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in MI · 4301078585
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
4354 E GRAND RIVER AVE, Howell, MI 48843
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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company.Insurance ›

CLIA Laboratory Certificates CMS CLIA 2

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 23D2323357

Medical Office Of John Vassallo · Howell, MI
Active · expires May 5, 2027
CLIA Number23D2323357
Laboratory TypePhysician Office
Certificate Effective DateMay 6, 2025
Certificate Expiration DateMay 5, 2027
Laboratory DirectorJohn C. Vassallo
Laboratory Phone(517) 540-0709
Laboratory LocationMedical Office Of John Vassallo4354 E Grand River, Howell, MI 48843
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Certificate of Waiver 23D1061597

Medical Office Of John Vassallo MD · Brighton, MI
Active · expires Nov 20, 2026
CLIA Number23D1061597
Laboratory TypeIndependent
Certificate Effective DateNovember 21, 2024
Certificate Expiration DateNovember 20, 2026
Laboratory DirectorJohn C. Vassallo
Laboratory Phone(517) 540-0709
Laboratory LocationMedical Office Of John Vassallo MD2209 Euler Road Suite 100, Brighton, MI 48114
CLIA data matches this NPI record on: Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

AMY-BETH MARGUERITE FUCIARELLI NP
Nurse Practitioner (Gerontology)
4354 E GRAND RIVER AVE
HOWELL, MI 48843
Livingston County (517) 540-0709
TERRA LYNN
Physician Assistant
4354 E GRAND RIVER AVE
HOWELL, MI 48843
Livingston County (517) 540-0709

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Medical Office Of John Vassallo MD PLLC's NPI number?

The NPI number for Medical Office Of John Vassallo MD PLLC is 1487712121. It was assigned to this organization in the NPPES registry on December 5, 2006.

Where is Medical Office Of John Vassallo MD PLLC located?

Medical Office Of John Vassallo MD PLLC is located at 4354 E Grand River Ave, Howell, MI 48843. The listed phone number is (517) 540-0709.

What is Medical Office Of John Vassallo MD PLLC's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Does Medical Office Of John Vassallo MD PLLC hold CLIA laboratory certificates?

Yes. 2 active CLIA laboratory certificates are associated with this NPI under the federal Clinical Laboratory Improvement Amendments program. The certificates are listed in the CLIA Laboratory Certificates section above.

What insurance does Medical Office Of John Vassallo MD PLLC accept?

Health plans from Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company list Medical Office Of John Vassallo MD PLLC as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Medical Office Of John Vassallo MD PLLC was last updated on April 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.