Howard C Marks, M.D.

Primary specialty

Gastroenterology PhysicianTaxonomy code 207RG0100X

License

G49155 Issued in CA

Practice address

1234 E North St
Suite 201
Manteca, CA 95336-4960

Phone

(209) 239-0515

Fax

(209) 239-0504

NPI assigned

Mar 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 1

Addresses

Medicare fee-for-service enrollment

Enrolled in CA

Enrollment records 1

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

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.

• Permanente Medical Group Inc

  • Internal Medicine Physician
  • Santa Clara, CA
  • NPI 1073606299
  Medicare reassignment NPD
• Permanente Medical Group, Inc

  • Clinical Medical Laboratory
  • San Jose, CA
  • NPI 1497971584
  NPD
• Santokh Bhullar MD Inc

  • Internal Medicine Physician
  • Tracy, CA
  • NPI 1801062260
  NPD (past)

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

{
    "created_epoch": "1141344000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1962479352",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1234 E NORTH ST",
            "address_2": "SUITE 201",
            "city": "MANTECA",
            "state": "CA",
            "postal_code": "953364960",
            "telephone_number": "209-239-0515",
            "fax_number": "209-239-0504"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1234 E NORTH ST",
            "address_2": "SUITE 201",
            "city": "MANTECA",
            "state": "CA",
            "postal_code": "953364960",
            "telephone_number": "209-239-0515",
            "fax_number": "209-239-0504"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MARKS",
        "first_name": "HOWARD",
        "middle_name": "C",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-03-03",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "CA",
            "license": "G49155",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Elizabeth Manzo M
• Cynthia Mar, PHARM.D
• Megan Mar
• Katy Maree Marconi, PHARM. D.
• Mark David Levine, M.D. Professional Corporation
• Michelle Marquez
• Brittney Martin
• Brenda Guadalupe Martinez Chavez, LCSW
• Natalia Martinez Ruiz
• Kiara Jailene Martinez-Castro, LCSW

• Gastroenterology Physician in Manteca, CA
• Providers in Manteca, CA by specialty
• Gastroenterology Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.