Nathan David Mjos, D.O.

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

License

20A10894 Issued in CA

Practice address

400 N Pepper Ave
Attn: Dept of Emergency Medicine
Colton, CA 92324-1801

Phone

(909) 580-1000

NPI assigned

Oct 21, 2009

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 1

Addresses

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

Emergency Medicine

Education

Other, 2008

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Cep America - CaliforniaGroup PAC ID 6103739131, 1,278 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Providence Holy Cross Medical Center Hospital, Mission Hills, CA, CCN 050278
• Saint John'S Health Center Hospital, Santa Monica, CA, CCN 050290

Merit-based Incentive Payment System (MIPS)

Final score

96.69 of 100Reported as group

Quality

90

Improvement activities

40

Cost

78.43

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Osteopathy

State licenses

Practice roles

Locations

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.

• Cep America - California

  • Emergency Medicine Physician
  • San Francisco, CA
  • NPI 1023063542

  CA, Emergency Medicine

  Medicare reassignment Care Compare group NPD
• Cep America - California

  • Emergency Medicine Physician
  • Santa Ana, CA
  • NPI 1548667843

  CA, Emergency Medicine

  Medicare reassignment Care Compare group NPD
• Saint Johns Emergency Medicine Specialists Inc a Medical Group

  • Emergency Medicine Physician
  • Santa Monica, CA
  • NPI 1609888940

  CA, Emergency Medicine

  Medicare reassignment NPD
• Cep America - California

  • Emergency Medicine Physician
  • Colton, CA
  • NPI 1306899166

  Emergency Medicine

  NPD
• Cep America - California

  • Emergency Medicine Physician
  • Los Angeles, CA
  • NPI 1649515487

  Emergency Medicine

  NPD
• Cep America-California

  • Emergency Medicine Physician
  • Murrieta, CA
  • NPI 1588552848

  Emergency Medicine

  NPD
• Johns Hopkins Emergency Medical

  • Emergency Care Clinic/Center
  • Columbia, MD
  • NPI 1922098466
  NPD (past)

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

• Providence Health System - Southern California

  • General Acute Care Hospital
  • Mission Hills, CA
  • NPI 1477587632

  Hospital

  Care Compare affiliation
• Providence Saint John'S Health Center

  • General Acute Care Hospital
  • Santa Monica, CA
  • NPI 1124026273

  Hospital

  Care Compare affiliation

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

{
    "created_epoch": "1256083200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783555200000",
    "number": "1124354493",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "26630 BARTON RD",
            "address_2": "APT 2714",
            "city": "REDLANDS",
            "state": "CA",
            "postal_code": "923734323",
            "telephone_number": "303-981-5709"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "400 N PEPPER AVE",
            "address_2": "ATTN: DEPT OF EMERGENCY MEDICINE",
            "city": "COLTON",
            "state": "CA",
            "postal_code": "923241801",
            "telephone_number": "909-580-1000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MJOS",
        "first_name": "NATHAN",
        "middle_name": "DAVID",
        "name_prefix": "Dr.",
        "credential": "D.O.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2009-10-21",
        "last_updated": "2026-07-09",
        "certification_date": "2026-07-09",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "CA",
            "license": "20A10894",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Marco Mitchell, PA-C
• Tyler Mitchell
• Geetanjli Mittal
• Ramesh R Mittal, MD
• Dan Miulli, DO
• Narges Moaddel, MD
• Mobile Care Services, Inc
• Mobility Solutions Inc
• Rebecca Lynn Mobley, R.N.
• Caleb Moering

• All providers in Colton, CA
• Emergency Medicine Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 9, 2026; 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.