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MARVIN D POSNER M D AND VIVIEN L PAN M D A MEDICAL CORPORATION
NPI 1609976414
Pediatrics - Neonatal-Perinatal Medicine in Mission Viejo, CA

Active since September 22, 2006
27800 MEDICAL CENTER RD, STUITE #100, MISSION VIEJO, CA 92691(949) 364-1400 Get Directions Write a Review

NPPES record last updated: December 30, 2025. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Dec 30, 2025, Aug 15, 2019 (2 updates tracked since 2019).

About Marvin D Posner M D And Vivien L Pan M D A Medical Corporation NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARVIN D POSNER M D AND VIVIEN L PAN M D A MEDICAL CORPORATION (NPI 1609976414), doing business as Perinatal Associates Of Orange County, is a healthcare organization registered as a neonatal-perinatal medicine in Mission Viejo, California and active in the NPI registry since September 2006. The organization lists Vivien L Pan, Md/owner, as its authorized official.

NPPES Registry Identity

NPI1609976414
Entity TypeOrganization
Primary Taxonomy2080N0001X
Legal Business NameMARVIN D POSNER M D AND VIVIEN L PAN M D A MEDICAL CORPORATION
Location Address27800 MEDICAL CENTER RD, STUITE #100Mission Viejo, CA 92691-6410
Mailing AddressPo Box 29482Saint Louis, MO 63126-7482 · (949) 643-3345 · Fax (949) 643-3560
Phone(949) 364-1400
Organization SubpartNo
Authorized OfficialVivien L PanMd/owner · (949) 364-4228
Enumeration DateSeptember 22, 2006
Last NPPES UpdateDecember 30, 20252 updates tracked since enumeration
NPPES CertifiedDecember 30, 2025
✔ NPI 1609976414 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Neonatal-Perinatal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code2080N0001X
Definition
A pediatrician who is the principal care provider for sick newborn infants. Clinical expertise is used for direct patient care and for consulting with obstetrical colleagues to plan for the care of mothers who have high-risk pregnancies.
27800 MEDICAL CENTER RD, Mission Viejo, CA 92691
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Other Names 1

Doing Business AsPerinatal Associates Of Orange County

Other Identifiers 3

Medicaid0102310CA
MedicaidGR0102310CA
OtherZZZ66789ZCA · Ca Blue Shield

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Marvin D Posner M D And Vivien L Pan M D A Medical Corporation is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Marvin D Posner M D And Vivien L Pan M D A Medical Corporation, which bills Medicare for the services this clinician delivers.

Clinician (1)

Vivien Pan, M.D.
Pediatric Medicine
NPI 1902903164
27800 MEDICAL CENTER RD STE 100
Mission Viejo, CA 92691
(949) 364-4428
✔ PECOSSame address

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Marvin D Posner M D And Vivien L Pan M D A Medical Corporation's NPI number?

The NPI number for Marvin D Posner M D And Vivien L Pan M D A Medical Corporation is 1609976414. It was assigned to this organization in the NPPES registry on September 22, 2006. The provider is doing business as Perinatal Associates Of Orange County.

Where is Marvin D Posner M D And Vivien L Pan M D A Medical Corporation located?

Marvin D Posner M D And Vivien L Pan M D A Medical Corporation is located at 27800 Medical Center Rd Stuite #100, Mission Viejo, CA 92691. The listed phone number is (949) 364-1400.

What is Marvin D Posner M D And Vivien L Pan M D A Medical Corporation's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Neonatal-Perinatal Medicine, with taxonomy code 2080N0001X.

Is Marvin D Posner M D And Vivien L Pan M D A Medical Corporation enrolled in Medicare?

Yes. Marvin D Posner M D And Vivien L Pan M D A Medical Corporation is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Marvin D Posner M D And Vivien L Pan M D A Medical Corporation?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Pediatric Medicine) reassigns their Medicare billing to Marvin D Posner M D And Vivien L Pan M D A Medical Corporation. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Marvin D Posner M D And Vivien L Pan M D A Medical Corporation was last updated on December 30, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.