Individual provider Active NPI

Mohammad Zalzaleh, DO

  • Orthopaedic Surgery Physician
  • Fountain Valley, CA
National Provider Identifier
1235792276
Registry record updated May 15, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Orthopaedic Surgery PhysicianTaxonomy code 207X00000X
License
20A20355 Issued in CA
Practice address
8700 Warner Ave Ste 140
Fountain Valley, CA 92708-3209
Phone
(714) 850-7300
NPI assigned
Apr 16, 2019
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on May 15, 2025

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

Specialties & licenses 3

Specialty (taxonomy)CodeLicenseStatePrimary
Orthopaedic Hand Surgery Physician 207XS0106X 81378-21 WI
Student in an Organized Health Care Education/Training Program 390200000X
Orthopaedic Surgery Physician 207X00000X 20A20355 CA Primary

Addresses

Primary practice location

8700 Warner Ave Ste 140
Fountain Valley, CA 92708-3209

Mailing address

8700 Warner Ave Ste 140
Fountain Valley, CA 92708-3209

Other practice location 1

8701 Watertown Plank Rd
Milwaukee, WI 53226-3548
Phone (414) 777-7700

Other practice location 2

11234 Anderson Street
GME Office Westerly Suite C
Loma Linda, CA 92354-2804
Phone (909) 558-6444

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
I20250808000972 CA Practitioner - Hand Surgery 5294271847 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Hand Surgery
Education
Other, 2019
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
OrthowestGroup PAC ID 3072932623, 48 clinicians

Practice addresses (Care Compare)

8700 Warner Ave
Suite 140
Fountain Valley, CA 92708-3209
Phone (714) 850-7300

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
20A20355CAMDOrthopaedic Surgery Physician
81378-21WIMDOrthopaedic Hand Surgery Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Orthowest Orthopaedic Surgery CurrentSince Jul 1, 2025 Accepting new patients
Orthowest Orthopaedic Surgery CurrentSince Jul 1, 2025 Accepting new patients
Daniel T Stein, M.D. a Medical Corporation Past Accepting new patients

Locations

8700 Warner Ave
Fountain Valley, CA 92708

8700 Warner Ave
Ste 140
Fountain Vly, CA 92708
Phone (714) 847-6727

22 Odyssey
Ste 205
Irvine, CA 92618
Phone (949) 870-3332

24331 El Toro Rd
Ste 200
Laguna Woods, CA 92637
Phone (949) 767-0800

2445 W Chapman Ave
Ste 100
Orange, CA 92868
Phone (714) 850-7300

Networks

  • BSC 65 PLUS INDIVIDUAL MAPD

Interoperability endpoints

  • Direct secure messaging: mzalzaleh145555@direct.llu.edu

Organizations & group practices 3

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": "1555372800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1747267200000",
    "number": "1235792276",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "8700 WARNER AVE STE 140",
            "city": "FOUNTAIN VALLEY",
            "state": "CA",
            "postal_code": "927083209"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "8700 WARNER AVE STE 140",
            "city": "FOUNTAIN VALLEY",
            "state": "CA",
            "postal_code": "927083209",
            "telephone_number": "714-850-7300"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "8701 Watertown Plank Rd",
            "address_purpose": "LOCATION",
            "city": "Milwaukee",
            "state": "WI",
            "postal_code": "532263548",
            "country_code": "US",
            "telephone_number": "414-777-7700",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "11234 Anderson Street",
            "address_2": "GME Office Westerly Suite C",
            "address_purpose": "LOCATION",
            "city": "Loma Linda",
            "state": "CA",
            "postal_code": "923542804",
            "country_code": "US",
            "telephone_number": "909-558-6444",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "ZALZALEH",
        "first_name": "MOHAMMAD",
        "credential": "DO",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2019-04-16",
        "last_updated": "2025-05-15",
        "certification_date": "2025-05-15",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207XS0106X",
            "taxonomy_group": "",
            "desc": "Orthopaedic Surgery, Hand Surgery",
            "state": "WI",
            "license": "81378-21",
            "primary": false
        },
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207X00000X",
            "taxonomy_group": "",
            "desc": "Orthopaedic Surgery",
            "state": "CA",
            "license": "20A20355",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Fountain Valley, CA

Sources for this page

Verify at the official NPI Registry.