NPIMap

Organization Active NPI

Marvin D Posner M D and Vivien L Pan M D a Medical Corporation

Doing business as Perinatal Associates of Orange County

  • Neonatal-Perinatal Medicine Physician
  • Mission Viejo, CA
National Provider Identifier
1609976414
Registry record updated Dec 30, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Neonatal-Perinatal Medicine PhysicianTaxonomy code 2080N0001X
Legal business name
MARVIN D POSNER M D AND VIVIEN L PAN M D A MEDICAL CORPORATION
Doing business as
Perinatal Associates of Orange County
Practice address
27800 Medical Center Rd
Stuite #100
Mission Viejo, CA 92691-6410
Phone
(949) 364-1400
NPI assigned
Sep 22, 2006
Last updated
Dec 30, 2025By the provider in NPPES
Organization subpart
No

NPPES NPI Registry

Updated by the provider on Dec 30, 2025

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

Authorized official

Name
Vivien L PanNPI 1902903164
Title
MD/Owner
Phone
(949) 364-4228

Authorized official NPPES reports the official by name only. The link goes to the one practitioner connected to this organization with that name.

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Neonatal-Perinatal Medicine PhysicianGroup: 193400000X SINGLE SPECIALTY GROUP 2080N0001X Primary

Addresses

Primary practice location

27800 Medical Center Rd
Stuite #100
Mission Viejo, CA 92691-6410

Mailing address

PO Box 29482
Saint Louis, MO 63126-7482
Phone (949) 643-3345

Other names 1

  • PERINATAL ASSOCIATES OF ORANGE COUNTY Doing business as

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in CA

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
O20051219000720 CA Part B Supplier - Clinic/Group Practice 1658393673 Receives reassigned benefits from 1 practitioner
Practice locations: Mission Viejo, CA

National Provider Directory

National Provider Directory

Locations

27700 Medical Center Rd
Ste 100
Mission Viejo, CA 92691

Practitioners & affiliated clinicians

Practitioners 10

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.

NPI Registry JSON

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

{
    "created_epoch": "1158883200000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1767052800000",
    "number": "1609976414",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 29482",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "631267482",
            "telephone_number": "949-643-3345",
            "fax_number": "949-643-3560"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "27800 MEDICAL CENTER RD",
            "address_2": "STUITE #100",
            "city": "MISSION VIEJO",
            "state": "CA",
            "postal_code": "926916410",
            "telephone_number": "949-364-1400"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "MARVIN D POSNER M D AND VIVIEN L PAN M D A MEDICAL CORPORATION",
        "organizational_subpart": "NO",
        "enumeration_date": "2006-09-22",
        "last_updated": "2025-12-30",
        "certification_date": "2025-12-30",
        "status": "A",
        "authorized_official_last_name": "PAN",
        "authorized_official_first_name": "VIVIEN",
        "authorized_official_middle_name": "L",
        "authorized_official_title_or_position": "MD/OWNER",
        "authorized_official_telephone_number": "949-364-4228"
    },
    "taxonomies": [
        {
            "code": "2080N0001X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Pediatrics, Neonatal-Perinatal Medicine",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "organization_name": "PERINATAL ASSOCIATES OF ORANGE COUNTY",
            "code": "3",
            "type": "Doing Business As"
        },
        {
            "organization_name": "PERINATAL ASSOCIATES OF ORANGE COUNTY",
            "code": "3",
            "type": "Doing Business As"
        }
    ]
}

Other providers in Mission Viejo, CA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 30, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.