Pasadena Observation Medical Group PC

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

Legal business name

PASADENA OBSERVATION MEDICAL GROUP PC

Practice address

100 W California Blvd
Pasadena, CA 91105-3010

Phone

(877) 346-2211

Fax

(407) 324-4727

NPI assigned

Nov 2, 2026

Last updated

Nov 2, 2026By 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

Nicholas Greco, MDNPI 1023325289

Title

Authorized Official

Phone

(877) 346-2211

Specialties & licenses 4

Addresses

Practitioners 1

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles, and the practitioner matching its NPPES authorized official.

• Nicholas Withrow Greco, M.D.

  • Emergency Medicine Physician
  • Pasadena, CA
  • NPI 1023325289
  Authorized official Same address or phone

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

{
    "created_epoch": "1793577600000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1793577600000",
    "number": "1932008570",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 60259",
            "city": "LOS ANGELES",
            "state": "CA",
            "postal_code": "900600259",
            "telephone_number": "877-346-2211",
            "fax_number": "407-324-4727"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "100 W CALIFORNIA BLVD",
            "city": "PASADENA",
            "state": "CA",
            "postal_code": "911053010",
            "telephone_number": "877-346-2211",
            "fax_number": "407-324-4727"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "PASADENA OBSERVATION MEDICAL GROUP PC",
        "organizational_subpart": "NO",
        "enumeration_date": "2026-11-02",
        "last_updated": "2026-11-02",
        "certification_date": "2026-11-02",
        "status": "A",
        "authorized_official_last_name": "GRECO",
        "authorized_official_first_name": "NICHOLAS",
        "authorized_official_title_or_position": "AUTHORIZED OFFICIAL",
        "authorized_official_telephone_number": "877-346-2211",
        "authorized_official_credential": "MD"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Emergency Medicine",
            "state": null,
            "license": null,
            "primary": true
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Internal Medicine",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "363A00000X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Physician Assistant",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "363L00000X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Nurse Practitioner",
            "state": null,
            "license": null,
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• Pasadena Nyx LLC (NYX Sleep Disorders Center of Pasadena)
• Pasadena Orthopedics Inc
• Pasadena Outpatient
• Pasadena Palace Tcu LLC
• Pasadena Pediatric Surgery, Inc.
• Pasadena Pellet Therapy, Inc.

• Emergency Medicine Physician in Pasadena, CA
• Providers in Pasadena, CA by specialty
• Emergency Medicine Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Nov 2, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.

Verify at the official NPI Registry.