Individual provider Active NPI

Cassandra A Mahan-Richards, M.D.

  • Pediatrics Physician
  • Grand Terrace, CA
National Provider Identifier
1093767782
Registry record updated Sep 16, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Pediatrics PhysicianTaxonomy code 208000000X
License
G53986 Issued in CA
Practice address
11980 Mount Vernon Ave
Grand Terrace, CA 92313-5172
Phone
(909) 864-1097
Fax
(951) 225-6879
NPI assigned
May 17, 2006
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Sep 16, 2025

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

Specialties & licenses 3

Specialty (taxonomy)CodeLicenseStatePrimary
Pediatrics Physician 208000000X G53986 CA Primary
Allergy Physician 207KA0200X G53986 CA
Allergy Physician 207KA0200X MD60286895 WA

Addresses

Primary practice location

11980 Mount Vernon Ave
Grand Terrace, CA 92313-5172

Mailing address

PO Box 3649
Spokane, WA 99220-3649

Other practice location 1

847 W Childs Ave
Merced, CA 95341-6862
Phone (209) 722-4842

Other identifiers 2

IdentifierTypeStateIssuer
MD60286895OtherWAWASHINGTON STATE LICENSE
00G646250MedicaidCA

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in WA, CA2 enrollments
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 2

Enrollment IDStateProvider typePAC IDDetails
I20150313001995 WA Practitioner - Pediatric MedicinePractitioner - Allergy/Immunology 3870487606 Reassigns benefits to 1 organization
I20251002005094 CA Practitioner - Pediatric Medicine 3870487606 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Pediatric Medicine
Education
Other, 1983
Medicare assignment
May accept Medicare assignment

Practice addresses (Care Compare)

1910 Customer Care Way
Atwater, CA 95301-5167

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
G53986CAMDAllergy Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Multicare Health System Current Accepting new patients
Golden Valley Health Centers CurrentSince Sep 1, 2025 Accepting new patients
Multicare Health System Pediatrics CurrentSince Nov 1, 2024 Accepting new patients
Golden Valley Health Center CurrentSince Sep 1, 2025 Accepting new patients
Golden Valley Health Centers Current Accepting new patients
Multicare Health System CurrentSince Nov 1, 2024 Accepting new patients
Rockwood Clinic PS Past Accepting new patients
Golden Valley Health Center Past Accepting new patients
Mathiesen Memorial Health Center PastSince Jun 5, 2022 Accepting new patients
Prairie Medical Group Past Accepting new patients
Pinnicale Pain Center PastSince Mar 26, 2018 Accepting new patients
Peter Jahangir Parker, MD, Inc. PastSince May 22, 2022 Accepting new patients

Locations

1405 California Ave
Dos Palos, CA 93620
Phone (209) 392-2111

13161 Jefferson St
Le Grand, CA 95333
Phone (209) 389-1900

821 Texas Ave
Los Banos, CA 93635
Phone (209) 385-5481

250 Northgate Dr
Manteca, CA 95336
Phone (209) 239-5299

797 W Childs Ave
Merced, CA 95341
Phone (209) 383-5871

3940 Sandpiper Ave
Merced, CA 95340
Phone (209) 381-4104

847 W Childs Ave
Merced, CA 95341
Phone (209) 383-7441

847 W Childs Ave
Ste B
Merced, CA 95341

847 W Childs Ave
Ste A
Merced, CA 95341
Phone (209) 383-7441

1500 Florida Ave
Modesto, CA 95350
Phone (209) 571-5071

1114 6th St
Modesto, CA 95354
Phone (209) 576-2845

2101 Tenaya Dr
Modesto, CA 95354
Phone (209) 576-6766

1121 Hammond St
Modesto, CA 95351
Phone (209) 576-4437

637 Merced St
Newman, CA 95360
Phone (209) 862-0270

200 C St
Patterson, CA 95363
Phone (209) 892-6307

9235 E Broadway St
Planada, CA 95365
Phone (209) 382-0253

4150 Patterson Rd
Riverbank, CA 95367
Phone (209) 863-3900

1200 W Main St
Turlock, CA 95380
Phone (209) 668-5388

4700 Point Fosdick Dr
Ste 104
Gig Harbor, WA 98335
Phone (253) 459-7590

222 State Ave N
Kent, WA 98030
Phone (253) 372-7680

200 Lilly Rd NE
Ste C
Olympia, WA 98506
Phone (360) 918-8336

Interoperability endpoints

  • Direct secure messaging: cassandra.richardsmahan.p1@direct.mathiesenmemorialhc.nextgenshare.com

Organizations & group practices 12

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.

NPI Registry JSON

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

{
    "created_epoch": "1147824000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757980800000",
    "number": "1093767782",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 3649",
            "city": "SPOKANE",
            "state": "WA",
            "postal_code": "992203649"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "11980 MOUNT VERNON AVE",
            "city": "GRAND TERRACE",
            "state": "CA",
            "postal_code": "923135172",
            "telephone_number": "909-864-1097",
            "fax_number": "951-225-6879"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "847 W Childs Ave",
            "address_purpose": "LOCATION",
            "city": "Merced",
            "state": "CA",
            "postal_code": "953416862",
            "country_code": "US",
            "telephone_number": "209-722-4842",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "MAHAN-RICHARDS",
        "first_name": "CASSANDRA",
        "middle_name": "A",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2006-05-17",
        "last_updated": "2025-09-16",
        "certification_date": "2025-09-16",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208000000X",
            "taxonomy_group": "",
            "desc": "Pediatrics",
            "state": "CA",
            "license": "G53986",
            "primary": true
        },
        {
            "code": "207KA0200X",
            "taxonomy_group": "",
            "desc": "Allergy & Immunology, Allergy",
            "state": "CA",
            "license": "G53986",
            "primary": false
        },
        {
            "code": "207KA0200X",
            "taxonomy_group": "",
            "desc": "Allergy & Immunology, Allergy",
            "state": "WA",
            "license": "MD60286895",
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "WASHINGTON STATE LICENSE",
            "identifier": "MD60286895",
            "state": "WA"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "00G646250",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Grand Terrace, CA

Sources for this page

Verify at the official NPI Registry.