Mark P. Clark, MD

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

G50527 Issued in CA

Practice address

3746 Foothill Blvd # B140
Glendale, CA 91214-1740

Phone

(310) 445-5999

Fax

(323) 544-4248

NPI assigned

Nov 3, 2006

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in CA

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

Internal MedicineAlso: General Surgery

Education

Loyola University of Chicago, Stritch School of Medicine, 1982

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

City and County of San FranciscoGroup PAC ID 1658280748, 368 clinicians

One Medical Group IncGroup PAC ID 2567623739, 330 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Laguna Honda Hospital & Rehabilitation Center Hospital, San Francisco, CA, CCN 050668

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: mclark42763@ehr.johnmuirhealth.com

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.

• One Medical Group, Inc.

  • Family Medicine Physician
  • San Francisco, CA
  • NPI 1467781641

  Internal Medicine

  Medicare reassignment Care Compare group NPD
• City & County of San Francisco

  • Clinical Medical Laboratory
  • San Francisco, CA
  • NPI 1982737524
  Medicare reassignment Care Compare group
• Skilled Biologics, Inc.

  • Surgery Physician
  • Sacramento, CA
  • NPI 1376386763
  Medicare reassignment NPD
• Skilled Facility Health Care Solutions Inc

  • Surgery Physician
  • Los Angeles, CA
  • NPI 1104018423
  Medicare reassignment NPD
• Skilled Physicians Group

  • General Practice Physician
  • Glendale, CA
  • NPI 1902444623
  Medicare reassignment
• Skilled Facility Health Care Solutions Inc

  • Surgery Physician
  • Los Angeles, CA
  • NPI 1871756403
  NPD
• One Medical Group, Inc

  • Family Medicine Physician
  • Tigard, OR
  • NPI 1891521134

  Internal Medicine

  NPD

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• City & County of San Francisco

  • General Acute Care Hospital
  • San Francisco, CA
  • NPI 1235172560
  Care Compare affiliation

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

{
    "created_epoch": "1162512000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1763424000000",
    "number": "1891874665",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3746 FOOTHILL BLVD # B140",
            "city": "GLENDALE",
            "state": "CA",
            "postal_code": "912141740",
            "telephone_number": "310-445-5999",
            "fax_number": "323-544-4248"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3746 FOOTHILL BLVD # B140",
            "city": "GLENDALE",
            "state": "CA",
            "postal_code": "912141740",
            "telephone_number": "310-445-5999",
            "fax_number": "323-544-4248"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "840 Irving St",
            "address_purpose": "LOCATION",
            "city": "San Francisco",
            "state": "CA",
            "postal_code": "941222311",
            "country_code": "US",
            "telephone_number": "888-663-6331",
            "fax_number": "415-252-7176",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "CLARK",
        "first_name": "MARK",
        "middle_name": "P.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-11-03",
        "last_updated": "2025-11-18",
        "certification_date": "2025-11-18",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CA",
            "license": "G50527",
            "primary": true
        },
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "CA",
            "license": "G50527",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Citywide Home Care Inc.
• CJ Trans, Inc.
• Tiffany Clare
• Clarisse Atakhanian DDS Inc
• Dametre Darrelle Clark
• Naomi Clark, MASSAGE THERAPIST
• Calliope Clauson, R1512130623
• John Charles Clayton
• Clear Sky Home Health Care, Inc.
• Jillian Cleland, MS, RDN

• Internal Medicine Physician in Glendale, CA
• Providers in Glendale, CA by specialty
• Internal Medicine Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Nov 18, 2025; 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.