John Michael Guest, MD

Primary specialty

Ophthalmology PhysicianTaxonomy code 207W00000X

License

4351044538 Issued in MI

Practice address

21931 E 9 Mile Rd
Saint Clair Shores, MI 48080-2906

Phone

(586) 210-2464

Fax

(586) 204-2473

NPI assigned

May 21, 2019

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in MI

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Ophthalmology

Education

Wayne State University School of Medicine, 2019

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Richard C Mertz Jr MD PCGroup PAC ID 3173562824, 5 clinicians

Practice addresses (Care Compare)

Merit-based Incentive Payment System (MIPS)

Final score

86 of 100Reported as group

Quality

96.22

Improvement activities

40

Cost

58.37

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: jguest@metropolitaneyecenter.direct.eyemdemr.com
• Direct secure messaging: jguest548208@direct.hfhs.org

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

• Richard C Mertz Jr MD PC

  • Ophthalmology Physician
  • St Clair Shores, MI
  • NPI 1467408914
  Medicare reassignment Care Compare group NPD

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

{
    "created_epoch": "1558396800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1782864000000",
    "number": "1235796780",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "21931 E 9 MILE RD",
            "city": "SAINT CLAIR SHORES",
            "state": "MI",
            "postal_code": "480802906",
            "telephone_number": "586-210-2464",
            "fax_number": "586-204-2473"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "21931 E 9 MILE RD",
            "city": "SAINT CLAIR SHORES",
            "state": "MI",
            "postal_code": "480802906",
            "telephone_number": "586-210-2464",
            "fax_number": "586-204-2473"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "18101 Oakwood Blvd",
            "address_purpose": "LOCATION",
            "city": "Dearborn",
            "state": "MI",
            "postal_code": "481244089",
            "country_code": "US",
            "telephone_number": "313-593-7795",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "4717 Saint Antoine St",
            "address_purpose": "LOCATION",
            "city": "Detroit",
            "state": "MI",
            "postal_code": "482011423",
            "country_code": "US",
            "telephone_number": "313-577-8900",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "GUEST",
        "first_name": "JOHN",
        "middle_name": "MICHAEL",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2019-05-21",
        "last_updated": "2026-07-01",
        "certification_date": "2026-07-01",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207W00000X",
            "taxonomy_group": "",
            "desc": "Ophthalmology",
            "state": "MI",
            "license": "4351044538",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Russell Shane Gregory, DPT
• Carly Autumn Fisher Grisamer
• Domenic G Grosso, D.O.
• GS Jayakar MDPC
• James Arthur Guest, DDS
• Anthony Joseph Guido, HIS
• Donna Gula
• Heather M Gulish, M.S.N., C.U.N.P.
• Nathan A Gura, DPT
• Brian V Guz, MD

• Ophthalmology Physician in Saint Clair Shores, MI
• Providers in Saint Clair Shores, MI by specialty
• Ophthalmology Physician in Michigan

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 1, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• 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.