NPIMap

Organization Active NPI

Mathias Masem, M.D.

  • Specialist
  • Oakland, CA
National Provider Identifier
1457371643
Registry record updated Aug 22, 2020
On this page

Key facts

NPPES NPI Registry
Primary specialty
SpecialistTaxonomy code 174400000X
License
G34134 Issued in CA
Legal business name
MATHIAS MASEM, M.D.
Practice address
80 Grand Ave.,
Suite 600
Oakland, CA 94612
Phone
(510) 763-0709
Fax
(510) 763-8753
NPI assigned
Jul 20, 2006
Organization subpart
No

NPPES NPI Registry

Updated by the provider on Aug 22, 2020

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

Authorized official

Name
Dr. Mathias Masem, M.D.NPI 1508810938
Title
Sole Practioner
Phone
(510) 763-0709

Authorized official NPPES reports the official by name only. The link goes to the one practitioner connected to this organization with that name.

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
SpecialistGroup: 193400000X SINGLE SPECIALTY GROUP 174400000X G34134 CA Primary

Addresses

Primary practice location

80 Grand Ave.,
Suite 600
Oakland, CA 94612

Mailing address

80 Grand Ave Ste 600
Oakland, CA 94612-3744
Phone (510) 763-0709

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in CA2 enrollments

Enrollment records 2

Enrollment IDStateProvider typePAC IDDetails
O20100930086790 CA DME Supplier - Physician - General PracticeDME Supplier - Physician - General Surgery 5395941975 1 other NPI on this enrollment
Practice locations: Oakland, CA
O20230331001459 CA Part B Supplier - Clinic/Group Practice 5395941975 Receives reassigned benefits from 3 practitioners
Practice locations: Oakland, CA

Other NPIs on the same Medicare enrollment 1

NPIs listed together on one Medicare enrollment, typically parts of the same organization.

National Provider Directory

National Provider Directory

Practitioners & affiliated clinicians

Practitioners 3

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

NPI Registry JSON

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

{
    "created_epoch": "1153353600000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1598054400000",
    "number": "1457371643",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "80 GRAND AVE STE 600",
            "city": "OAKLAND",
            "state": "CA",
            "postal_code": "946123744",
            "telephone_number": "510-763-0709",
            "fax_number": "510-763-8753"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "80 GRAND AVE.,",
            "address_2": "SUITE 600",
            "city": "OAKLAND",
            "state": "CA",
            "postal_code": "94612",
            "telephone_number": "510-763-0709",
            "fax_number": "510-763-8753"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "MATHIAS MASEM, M.D.",
        "organizational_subpart": "NO",
        "enumeration_date": "2006-07-20",
        "last_updated": "2020-08-22",
        "status": "A",
        "authorized_official_last_name": "MASEM",
        "authorized_official_first_name": "MATHIAS",
        "authorized_official_title_or_position": "SOLE PRACTIONER",
        "authorized_official_telephone_number": "510-763-0709",
        "authorized_official_name_prefix": "Dr.",
        "authorized_official_credential": "M.D."
    },
    "taxonomies": [
        {
            "code": "174400000X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Specialist",
            "state": "CA",
            "license": "G34134",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Oakland, CA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 22, 2020; 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.