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SEASIDE EMERGENCY ASSOCIATES
NPI 1639577802
Emergency Medicine in Ventura, CA

Active since December 19, 2014
300 HILLMONT AVE, VENTURA, CA 93003(805) 652-6000 Get Directions Write a Review

NPPES record last updated: December 1, 2020. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Seaside Emergency Associates NPPES

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

SEASIDE EMERGENCY ASSOCIATES (NPI 1639577802) is a healthcare organization registered as an emergency medicine in Ventura, California and active in the NPI registry since December 2014. The organization lists Jeff L. Robinson, President, as its authorized official.

NPPES Registry Identity

NPI1639577802
Entity TypeOrganization
Primary Taxonomy207P00000X
Legal Business NameSEASIDE EMERGENCY ASSOCIATES
Location Address300 HILLMONT AVEVentura, CA 93003-1651
Mailing AddressPo Box 31001-2220Los Angeles, CA 91110-2220 · (626) 447-0296
Phone(805) 652-6000
Organization SubpartNo
Authorized OfficialJeff L. RobinsonPresident · (626) 447-0296
Enumeration DateDecember 19, 2014
Last NPPES UpdateDecember 1, 2020
NPPES CertifiedDecember 1, 2020
✔ NPI 1639577802 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
300 HILLMONT AVE, Ventura, CA 93003
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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)

Seaside Emergency Associates is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

62

Medicare enrollment records show 62 clinicians reassign Medicare billing to Seaside Emergency Associates, which bills Medicare for the services they deliver. Of these, 11 practice at this address and 29 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 3

Family Practice27
Emergency Medicine24
Nurse Practitioner11

Nearest to this location (20)

See all 62
Richard Cegelski, M.D.
Family Practice
NPI 1235390071
300 HILLMONT AVE
Ventura, CA 93003
(805) 652-6165
✔ PECOSSame address
David Donner, MD
Emergency Medicine
NPI 1760041321
300 HILLMONT AVE BLDG 340, SUITE 201
Ventura, CA 93003
(805) 652-6100
✔ PECOS✔ Accepts MedicareSame address
Mary Hawara, MSN, FNP
Nurse Practitioner
NPI 1205753308
300 HILLMONT AVE
Ventura, CA 93003
(805) 652-6000
✔ PECOSSame address
Tammie Hensley, FNP
Nurse Practitioner
NPI 1578808192
300 HILLMONT AVE
Ventura, CA 93003
(805) 652-6168
✔ PECOSSame address
Teresa Hong, NP
Nurse Practitioner
NPI 1013251396
300 HILLMONT AVE STE 401
Ventura, CA 93003
(805) 652-6201
✔ PECOS✔ Accepts MedicareSame address
Tipu Khan, M.D.
Family Practice
NPI 1801059555
300 HILLMONT AVE STE 201
Ventura, CA 93003
(805) 652-6100
✔ PECOS✔ Accepts MedicareSame address
Srivikram Margam S, DO
Family Practice
NPI 1710733712
300 HILLMONT AVE STE 120
Ventura, CA 93003
(805) 652-6228
✔ PECOS✔ Accepts MedicareSame address
Benjamin Mati, MD
Family Practice
NPI 1447526413
300 HILLMONT AVE
Ventura, CA 93003
(805) 652-6165
✔ PECOS✔ Accepts MedicareSame address
Richard Nakano, MD
Emergency Medicine
NPI 1720650781
300 HILLMONT AVE STE 120
Ventura, CA 93003
(805) 652-6228
✔ PECOS✔ Accepts MedicareSame address
Tara Paterson, M.D.
Emergency Medicine
NPI 1972731784
300 HILLMONT AVE
Ventura, CA 93003
(805) 652-6000
✔ PECOS✔ Accepts MedicareSame address
Jacob West, MD
Family Practice
NPI 1154815991
300 HILLMONT AVE
Ventura, CA 93003
(805) 652-6000
✔ PECOS✔ Accepts MedicareSame address
Catarina Castaneda, M.D.
Family Practice
NPI 1710188198
3291 LOMA VISTA RD
Ventura, CA 93003
(805) 652-6100
✔ PECOS✔ Accepts Medicare0.1 mi
Gideon Gorit, M.D.
Family Practice
NPI 1922374990
3291 LOMA VISTA RD
Ventura, CA 93003
(805) 652-6228
✔ PECOS✔ Accepts Medicare0.1 mi
Matthew Kappen, M.D.
Family Practice
NPI 1699934125
3291 LOMA VISTA RD
Ventura, CA 93003
(805) 652-6228
✔ PECOS✔ Accepts Medicare0.1 mi
Grace Lin, M.D.
Family Practice
NPI 1457571895
3291 LOMA VISTA RD
Ventura, CA 93003
(805) 652-6100
✔ PECOS0.1 mi
Jayni Parikh, M.D.
Family Practice
NPI 1275763633
3291 LOMA VISTA RD
Ventura, CA 93003
(805) 652-6228
✔ PECOS✔ Accepts Medicare0.1 mi
Anthony Walls, M.D.
Family Practice
NPI 1770859571
3291 LOMA VISTA RD
Ventura, CA 93003
(805) 652-6228
✔ PECOS✔ Accepts Medicare0.1 mi
Martin Ehrlich, M.D.
Emergency Medicine
NPI 1336296862
3291 LOMA VISTA RD
Ventura, CA 93003
(805) 652-6556
✔ PECOS0.1 mi
Matthew Larrew, D.O.
Emergency Medicine
NPI 1508002742
3291 LOMA VISTA RD
Ventura, CA 93003
(805) 652-6000
✔ PECOS0.1 mi
Theodore Mandryk, MEDICAL DOCTOR
Emergency Medicine
NPI 1164413886
3291 LOMA VISTA RD
Ventura, CA 93003
(805) 652-6165
✔ PECOS✔ Accepts Medicare0.1 mi
See all 62 clinicians

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 Seaside Emergency Associates's NPI number?

The NPI number for Seaside Emergency Associates is 1639577802. It was assigned to this organization in the NPPES registry on December 19, 2014.

Where is Seaside Emergency Associates located?

Seaside Emergency Associates is located at 300 Hillmont Ave, Ventura, CA 93003. The listed phone number is (805) 652-6000.

What is Seaside Emergency Associates's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Seaside Emergency Associates enrolled in Medicare?

Yes. Seaside Emergency Associates is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Seaside Emergency Associates?

According to the CMS Revalidation Reassignment List (October 2026 release), 62 clinicians in 3 Medicare specialties reassign their Medicare billing to Seaside Emergency Associates. 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. The largest specialties are Family Practice (27), Emergency Medicine (24) and Nurse Practitioner (11). Of these, 11 practice at this address and 29 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Seaside Emergency Associates was last updated on December 1, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years 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.