Brian Leish, M.D.

Primary specialty

Family Medicine PhysicianTaxonomy code 207Q00000X

License

G58832 Issued in CA

Practice address

24411 Health Center Dr
Suite 460
Laguna Hills, CA 92653-3687

Phone

(949) 373-7799

Fax

(949) 334-8377

NPI assigned

Mar 6, 2007

Last updated

Nov 22, 2025By the provider in NPPES

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Other identifiers 1

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

Specialty

Family Practice

Education

University of California, Geffen School of Medicine, 1985

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Saddleback Medical Group IncGroup PAC ID 5092606905, 27 clinicians

Healthcare Partners Affiliates Medical GroupGroup PAC ID 7315842002, 775 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Mission Home Health of Irvine, LLC Home health agency, Irvine, CA, CCN 053149
• Care Plus Home Health Home health agency, Laguna Hills, CA, CCN 059376
• Memorialcare Saddleback Medical Center Hospital, Laguna Hills, CA, CCN 050603
• Providence Mission Hospital Hospital, Mission Viejo, CA, CCN 050567

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Networks

• BSC 65 PLUS INDIVIDUAL MAPD

Interoperability endpoints

• Direct secure messaging: bleish194632@westdirect.optum.com
• Direct secure messaging: bleishmd15172@direct.memorialcare.org
• Direct secure messaging: brian.leish.p15@direct.monarchhealthcare.nextgenshare.com
• Direct secure messaging: brian.leish.p33@direct.monarchhealthcare.nextgenshare.com
• Direct secure messaging: brian.leish.p7@direct.monarchhealthcare.nextgenshare.com

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.

• Healthcare Partners Affiliates Medical Group

  dba Optum

  • Internal Medicine Physician
  • Los Angeles, CA
  • NPI 1659312593

  Family Medicine

  Medicare reassignment Care Compare group NPD
• Saddleback Medical Group Inc

  • Gastroenterology Physician
  • Laguna Hills, CA
  • NPI 1386605822
  Medicare reassignment Care Compare group NPD
• Healthcare Partners Affiliates Medical Group

  dba Optum

  • Durable Medical Equipment & Medical Supplies
  • Murrieta, CA
  • NPI 1760057269
  NPD
• Children's Hospital at Mission

  dba Rady Children's Hospital

  • Children's Hospital
  • Mission Viejo, CA
  • NPI 1699868398
  NPD (past)
• Mission Hospital Regional Medical Center

  dba Providence Mission Hospital

  • Rehabilitation Hospital
  • Mission Viejo, CA
  • NPI 1003956913
  NPD (past)
• Saddleback Memorial Medical Center

  • Rehabilitation Hospital Unit
  • Laguna Hills, CA
  • NPI 1114967114
  NPD (past)
• Memorial Medical Group Inc

  • Durable Medical Equipment & Medical Supplies
  • Phoenix, AZ
  • NPI 1255523643
  NPD (past)

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

• Care Plus Nursing Services, Inc.

  dba CARE PLUS Home Health

  • Home Health Agency
  • Laguna Hills, CA
  • NPI 1528385143
  Care Compare affiliation
• Mission Home Health of Irvine, LLC

  • Home Health Agency
  • Irvine, CA
  • NPI 1013309707
  Care Compare affiliation
• Mission Hospital Regional Medical Center

  dba Providence Mission Hospital

  • General Acute Care Hospital
  • Mission Viejo, CA
  • NPI 1912108002
  Care Compare affiliation
• Mission Hospital Regional Medical Center

  dba Mission Hospital

  • General Acute Care Hospital
  • Mission Viejo, CA
  • NPI 1992752315
  Care Compare affiliation
• Saddleback Memorial Medical Center

  • General Acute Care Hospital
  • Laguna Hills, CA
  • NPI 1275576381
  Care Compare affiliation

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

{
    "created_epoch": "1173139200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1763769600000",
    "number": "1417087073",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 35380",
            "city": "LAS VEGAS",
            "state": "NV",
            "postal_code": "891335380",
            "telephone_number": "702-579-3203"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "24411 HEALTH CENTER DR",
            "address_2": "SUITE 460",
            "city": "LAGUNA HILLS",
            "state": "CA",
            "postal_code": "926533687",
            "telephone_number": "949-373-7799",
            "fax_number": "949-334-8377"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "LEISH",
        "first_name": "BRIAN",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2007-03-06",
        "last_updated": "2025-11-22",
        "certification_date": "2025-11-22",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "CA",
            "license": "G58832",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "G58832P47",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Stella Young Lee, R.D.
• Timothy Mark Lee, M.D.
• Calvin Lee Lefebvre, MPT
• Legends Healthcare LLC
• Lorrayne Lynn Leigh Belhumeur, PH.D.
• Alicia Celeste Lemire, MFT
• Erika Lemus
• Karolyn Marie Leonard, AMFT
• Let's Talk Marriage & Family Therapy, Inc.
• Letrix Power USA

• Family Medicine Physician in Laguna Hills, CA
• Providers in Laguna Hills, CA by specialty
• Family Medicine Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Nov 22, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.