Medical Office of John Vassallo MD PLLC

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

4301078585 Issued in MI

Legal business name

MEDICAL OFFICE OF JOHN VASSALLO MD PLLC

Practice address

4354 E Grand River Ave
Howell, MI 48843-8554

Phone

(517) 540-0709

Fax

(517) 540-1775

NPI assigned

Dec 5, 2006

Organization subpart

No

Registry information is reported by the provider to CMS and is not verified. About this source

Authorized official

Name

Dr. John C Vassallo, MDNPI 1275590119

Title

Owner

Phone

(517) 548-0010

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in MI

Enrollment records 1

These CMS records do not include an NPI. They are shown because their name and street address match this provider’s.

CLIA laboratory certificates

Locations

Practitioners 19

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles.

• John C Vassallo, M.D.

  • Internal Medicine Physician
  • Howell, MI
  • NPI 1275590119
  Medicare reassignment Care Compare group NPD Authorized official
• Terra Lynn

  • Physician Assistant
  • Howell, MI
  • NPI 1457943888
  Medicare reassignment Care Compare group NPD
• Payton Matthew Hirschenberger, PA

  • Physician Assistant
  • Caledonia, MI
  • NPI 1174254213
  Medicare reassignment Care Compare group
• Sydney Krenz

  • Family Nurse Practitioner
  • Novi, MI
  • NPI 1023976032
  Medicare reassignment Care Compare group
• Camryn Ozuch, PA-C

  • Physician Assistant
  • Pinckney, MI
  • NPI 1184408320
  Medicare reassignment Care Compare group
• Katherine Welles Robert, PA-C

  • Physician Assistant
  • Ann Arbor, MI
  • NPI 1285673210
  Medicare reassignment Care Compare group
• Crystal Aiello

  • Acute Care Nurse Practitioner
  • Detroit, MI
  • NPI 1194473827
  Medicare reassignment NPD
• Erin Gillespie

  • Nurse Practitioner
  • Howell, MI
  • NPI 1093673782
  Care Compare group NPD
• Ismael Martin, DO

  • Pulmonary Disease Physician
  • Naples, FL
  • NPI 1750353322

  MI

  Medicare reassignment
• Amy-Beth Marguerite Fuciarelli, NP

  • Gerontology Nurse Practitioner
  • Howell, MI
  • NPI 1255815882
  NPD
• Linda Carol Lachance, M.D.

  • Internal Medicine Physician
  • Howell, MI
  • NPI 1104825504
  NPD
• Pratima Deshmukh, M.D.

  • Internal Medicine Physician
  • Longwood, FL
  • NPI 1932109782

  Single Specialty

  NPD

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1165276800000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1776038400000",
    "number": "1487712121",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4354 E GRAND RIVER AVE",
            "city": "HOWELL",
            "state": "MI",
            "postal_code": "488438554",
            "telephone_number": "517-540-0709",
            "fax_number": "517-540-1775"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4354 E GRAND RIVER AVE",
            "city": "HOWELL",
            "state": "MI",
            "postal_code": "488438554",
            "telephone_number": "517-540-0709",
            "fax_number": "517-540-1775"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "MEDICAL OFFICE OF JOHN VASSALLO MD PLLC",
        "organizational_subpart": "NO",
        "enumeration_date": "2006-12-05",
        "last_updated": "2026-04-13",
        "certification_date": "2026-04-13",
        "status": "A",
        "authorized_official_last_name": "VASSALLO",
        "authorized_official_first_name": "JOHN",
        "authorized_official_middle_name": "C",
        "authorized_official_title_or_position": "OWNER",
        "authorized_official_telephone_number": "517-548-0010",
        "authorized_official_name_prefix": "Dr.",
        "authorized_official_credential": "MD"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Internal Medicine",
            "state": "MI",
            "license": "4301078585",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Morgan Elizabeth McKinney, LLP
• Douglas McLearon, M.D.
• Allan McMonagle, MSOT, OTRL
• Alexandra McMullen, NP-C
• Dorothy McShane, P.A.
• Medilodge of Howell Inc
• Gioconda Lorenza Medina-Perez, D.D.S.
• Meijer Inc
• Melissa Osborn, PLLC
• Angela Marie Melville, MS

• Internal Medicine Physician in Howell, MI
• Providers in Howell, MI by specialty
• Internal Medicine Physician in Michigan

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 13, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.