Four Rivers Management Corporation

Primary specialty

Skilled Nursing FacilityTaxonomy code 314000000X

Legal business name

FOUR RIVERS MANAGEMENT CORPORATION

Doing business as

Angels Nursing Health Center

Practice address

415 S Union Ave
Los Angeles, CA 90017-1007

Phone

(213) 484-0784

Fax

(213) 484-4967

NPI assigned

Aug 26, 2008

Last updated

Dec 5, 2013By the provider in NPPES

Organization subpart

No

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

Authorized official

Name

Matthew Karp

Title

President & Ceo

Phone

(818) 821-3897

Specialties & licenses 1

Addresses

Other names 1

• Angels Nursing Health Center Doing business as

Medicare fee-for-service enrollment

Enrolled in CA

Enrollment records 1

NPI to CCN mapping 1

The Medicare certification numbers (CCNs) connected to NPI 1184871659. Details of each certification follow.

• CCN 055704 Skilled nursing facility · Active · Details

Skilled nursing facility certification: CCN 055704

Legal name

FOUR RIVERS MANAGEMENT CORPORATION

Doing business as

ANGELS NURSING HEALTH CENTER

Certification status

Active

Provider type (POS)

Nursing home – SNF/NF dual certification

Participating since

Jun 1, 1973

Last certification

May 22, 2025

Beds

49

Ownership / control type

Limited Liability Corporation

Most recent change of ownership

Nov 1, 2008

Organization structure

CorporationProprietary

Enrollment address

415 S Union Ave
Los Angeles, CA 90017-1007

Nursing home name

ANGELS NURSING HEALTH CENTER

Affiliated entity

AARON MAYER

Listed as

Angels Nursing Health CenterCCN 055704 · All quality measures

Overall star rating

5 of 5

Health inspections

4 of 5

Staffing

4 of 5

Quality measures

5 of 5

Type

Medicare and Medicaid

Ownership

For profit - Limited Liability company

Certified

Jun 1, 1973

Medicare certification status

ActiveFrom the Provider of Services file

Certified beds

4945.0 residents per day on average

Chain

Aaron Mayer7 facilities in the chain

Penalties (3 years)

3Fines totaling $71,566

Processed by Care Compare on Aug 1, 2026.

All disclosed owners & managing parties 18

As disclosed on the Medicare enrollment (CMS All Owners files). Individuals include officers, directors and managing employees, who may not hold ownership.

Owners & managing parties with NPI records 1

Owners and managing parties disclosed on this facility’s Medicare enrollment that are themselves Medicare-enrolled.

• Loraine Diego, MD

  • Obstetrics & Gynecology Physician
  • Los Angeles, CA
  • NPI 1386689453

  Adp of the SNF, Operational/Managerial Control

  CMS ownership

Facilities with the same owner 3

Facilities that share an organizational owner with 5% or greater ownership or operational control.

• 1495 Cameron Avenue, LLC

  dba West Haven Healthcare

  • Skilled Nursing Facility
  • West Covina, CA
  • NPI 1912134263

  Deutsch 2016 Grat

  CMS ownership
• Foothill Heights Care Center LLC

  dba Foothill Heights Care Center

  • Skilled Nursing Facility
  • Pasadena, CA
  • NPI 1457719783

  Deutsch 2016 Grat

  CMS ownership
• Villa Camilla LLC

  dba Villa Serena Healthcare Center

  • Skilled Nursing Facility
  • Long Beach, CA
  • NPI 1750785572

  Deutsch 2016 Grat

  CMS ownership

Affiliated clinicians 1

Clinicians who list this facility as an affiliation in Medicare Care Compare.

• Carlos Samuel Martinez, MD

  • Internal Medicine Physician
  • Los Angeles, CA
  • NPI 1548572795

  Nursing home

  Care Compare affiliation

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

{
    "created_epoch": "1219708800000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1386201600000",
    "number": "1184871659",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "415 S UNION AVE",
            "city": "LOS ANGELES",
            "state": "CA",
            "postal_code": "900171007",
            "telephone_number": "213-484-0784",
            "fax_number": "213-484-4967"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "415 S UNION AVE",
            "city": "LOS ANGELES",
            "state": "CA",
            "postal_code": "900171007",
            "telephone_number": "213-484-0784",
            "fax_number": "213-484-4967"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "FOUR RIVERS MANAGEMENT CORPORATION",
        "organizational_subpart": "NO",
        "enumeration_date": "2008-08-26",
        "last_updated": "2013-12-05",
        "status": "A",
        "authorized_official_last_name": "KARP",
        "authorized_official_first_name": "MATTHEW",
        "authorized_official_title_or_position": "PRESIDENT & CEO",
        "authorized_official_telephone_number": "818-821-3897"
    },
    "taxonomies": [
        {
            "code": "314000000X",
            "taxonomy_group": "",
            "desc": "Skilled Nursing Facility",
            "state": "CA",
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "organization_name": "Angels Nursing Health Center",
            "code": "3",
            "type": "Doing Business As"
        }
    ]
}

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• Skilled Nursing Facility in Los Angeles, CA
• Providers in Los Angeles, CA by specialty
• Skilled Nursing Facility in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 5, 2013; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; facility enrollments, owners and changes of ownership; Provider of Services certification data.
• 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.