Individual provider Active NPI

Dale Joseph Ritzo, M.D.

  • Internal Medicine Physician
  • San Mateo, CA
National Provider Identifier
1255499323
Registry record updated Jun 28, 2011
On this page

Key facts

NPPES NPI Registry
Primary specialty
Internal Medicine PhysicianTaxonomy code 207R00000X
License
G50169 Issued in CA
Practice address
101 S San Mateo Dr
Suite 206
San Mateo, CA 94401-3819
Phone
(650) 343-4003
Fax
(650) 696-7040
NPI assigned
Dec 4, 2006
Last updated
Jun 28, 2011By the provider in NPPES
Sex
Male
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Jun 28, 2011

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Internal Medicine Physician 207R00000X G50169 CA Primary

Addresses

Primary practice location

101 S San Mateo Dr
Suite 206
San Mateo, CA 94401-3819

Mailing address

101 S San Mateo Dr
Suite 206
San Mateo, CA 94401-3819
Phone (650) 343-4003

Other identifiers 1

IdentifierTypeStateIssuer
00G501690MedicaidCA

Medicare participation

Medicare enrollment files
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

Enrollment IDStateProvider typePAC IDDetails
I20110817000272 CA Practitioner - Internal Medicine 7911176516 Practice locations: San Mateo, CA

Care Compare profile

Medicare Care Compare
Specialty
Internal Medicine
Education
University of Southern California Keck School of Medicine, 1983
Medicare assignment
Accepts the Medicare-approved amount as payment in full

Practice addresses (Care Compare)

101 S San Mateo Dr
Suite 206
San Mateo, CA 94401-3843
Phone (650) 343-4003

Hospital & facility affiliations

Merit-based Incentive Payment System (MIPS)

Final score
17.54 of 100Reported as individual
Quality
0
Improvement activities
0
Cost
58.47

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
G50169CAMDInternal Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
John a Ritzo MD Medical Corporation PastSince Jul 9, 2025 Accepting new patients
Frederick Health Hospital Inc Past Accepting new patients

Interoperability endpoints

  • Direct secure messaging: dritzo45747@hisp.ehr.sutterhealth.org

Organizations & group practices 2

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

Hospital & facility affiliations 5

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

NPI Registry JSON

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

{
    "created_epoch": "1165190400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1309219200000",
    "number": "1255499323",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "101 S SAN MATEO DR",
            "address_2": "SUITE 206",
            "city": "SAN MATEO",
            "state": "CA",
            "postal_code": "944013819",
            "telephone_number": "650-343-4003",
            "fax_number": "650-696-7040"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "101 S SAN MATEO DR",
            "address_2": "SUITE 206",
            "city": "SAN MATEO",
            "state": "CA",
            "postal_code": "944013819",
            "telephone_number": "650-343-4003",
            "fax_number": "650-696-7040"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "RITZO",
        "first_name": "DALE",
        "middle_name": "JOSEPH",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2006-12-04",
        "last_updated": "2011-06-28",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CA",
            "license": "G50169",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "00G501690",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in San Mateo, CA

Sources for this page

Verify at the official NPI Registry.