Individual provider Active NPI

Dagmara Olsen, MD

  • Internal Medicine Physician
  • Pico Rivera, CA
National Provider Identifier
1356912059
Registry record updated Jul 15, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Internal Medicine PhysicianTaxonomy code 207R00000X
License
193842 Issued in CA
Practice address
8337 Telegraph Rd Ste 102
Pico Rivera, CA 90660-4933
Phone
(562) 445-3181
NPI assigned
Jul 5, 2021
Last updated
Jul 15, 2025By the provider in NPPES
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jul 15, 2025

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Internal Medicine Physician 207R00000X T-4368 MS
Internal Medicine Physician 207R00000X 193842 CA Primary

Addresses

Primary practice location

8337 Telegraph Rd Ste 102
Pico Rivera, CA 90660-4933

Mailing address

8337 Telegraph Rd Ste 102
Pico Rivera, CA 90660-4933

Other identifiers 2

IdentifierTypeStateIssuer
T-4368OtherMSMEDICAL LICENSE
T-4368OtherMSMEDICAL BOARD OF MS

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
I20250305001875 CA Practitioner - Internal Medicine 6800317983 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Internal Medicine
Education
Other, 2006
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
The Roads Foundation, IncGroup PAC ID 2961722558, 57 clinicians

Practice addresses (Care Compare)

4525 E Atherton St
Long Beach, CA 90815-3700
Phone (562) 961-0155

4800 E Los Coyotes Diagonal
Long Beach, CA 90815-2897
Phone (562) 506-1313

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
193842CAMDInternal Medicine Physician
T-4368MSMDInternal Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Prohealth Partners, a Medical Group Internal Medicine Current Accepting new patients
The Roads Foundation, Inc. CurrentSince Feb 1, 2025 Accepting new patients
The Roads Foundation, Inc CurrentSince Feb 1, 2025 Accepting new patients
Magnolia Regional Health Center Current Accepting new patients
Prohealth Partners, a Medical Group, Inc. Internal Medicine CurrentSince Oct 1, 2025 Accepting new patients
Prohealth Partners a Medical Group CurrentSince Oct 1, 2025 Accepting new patients
Prohealth Partners, a Medical Group, Inc. Internal Medicine Past Accepting new patients

Locations

121 S Long Beach Blvd
Compton, CA 90221
Phone (310) 627-5850

4525 E Atherton St
Long Beach, CA 90815
Phone (562) 961-0155

4800 E Los Coyotes Diagonal
Long Beach, CA 90815
Phone (310) 627-5850

5979 Atlantic Ave
Long Beach, CA 90805
Phone (562) 423-0421

File 54567
Los Angeles, CA 90074
Phone (310) 491-9060

8337 Telegraph Rd
Ste 102
Pico Rivera, CA 90660
Phone (562) 445-3181

Networks

  • BSC 65 PLUS INDIVIDUAL MAPD

Interoperability endpoints

  • Direct secure messaging: dagmaraolsen@magnolia.medalliesdirect.net
  • FHIR API: https://fhir4.healow.com/fhir/r4/BFCDAD

Organizations & group practices 7

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.

NPI Registry JSON

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

{
    "created_epoch": "1625443200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1752537600000",
    "number": "1356912059",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "8337 TELEGRAPH RD STE 102",
            "city": "PICO RIVERA",
            "state": "CA",
            "postal_code": "906604933"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "8337 TELEGRAPH RD STE 102",
            "city": "PICO RIVERA",
            "state": "CA",
            "postal_code": "906604933",
            "telephone_number": "562-445-3181"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "OLSEN",
        "first_name": "DAGMARA",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2021-07-05",
        "last_updated": "2025-07-15",
        "certification_date": "2025-07-15",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "MS",
            "license": "T-4368",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CA",
            "license": "193842",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "MEDICAL LICENSE",
            "identifier": "T-4368",
            "state": "MS"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "MEDICAL BOARD OF MS",
            "identifier": "T-4368",
            "state": "MS"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Pico Rivera, CA

Sources for this page

Verify at the official NPI Registry.