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OBSTETRIC ANESTHESIA ASSOCIATES INC
NPI 1184041857
Anesthesiology in Whittier, CA

Active since March 19, 2014
12401 WASHINGTON BLVD, WHITTIER, CA 90602(562) 698-0811 Get Directions Write a Review

NPPES record last updated: March 19, 2014. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Obstetric Anesthesia Associates Inc NPPES

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

OBSTETRIC ANESTHESIA ASSOCIATES INC (NPI 1184041857) is a healthcare organization registered as an anesthesiology in Whittier, California and active in the NPI registry since March 2014. The organization lists Philip Greider, President, as its authorized official.

NPPES Registry Identity

NPI1184041857
Entity TypeOrganization
Primary Taxonomy207L00000X
Legal Business NameOBSTETRIC ANESTHESIA ASSOCIATES INC
Location Address12401 WASHINGTON BLVDWhittier, CA 90602-1006
Mailing AddressPo Box 3129Torrance, CA 90510-3129 · (310) 792-3914 · Fax (855) 898-4055
Phone(562) 698-0811
Organization SubpartNo
Authorized OfficialPhilip GreiderPresident · (310) 792-3914
Enumeration DateMarch 19, 2014
✔ NPI 1184041857 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
12401 WASHINGTON BLVD, Whittier, CA 90602
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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)

Obstetric Anesthesia Associates Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

5

Medicare enrollment records show 5 clinicians reassign Medicare billing to Obstetric Anesthesia Associates Inc, which bills Medicare for the services they deliver. Of these, 1 practice at this address and 2 within 10 miles. They are listed nearest first.

Clinicians, nearest first (5)

Philip Greider, MD
Anesthesiology
NPI 1427232982
12401 WASHINGTON BLVD
Whittier, CA 90602
(562) 698-0811
✔ PECOSSame address
Michael Weinfeld, MD, MS
Anesthesiology
NPI 1396242129
12401 WASHINGTON BLVD
Whittier, CA 90602
(562) 698-0811
✔ PECOS✔ Accepts Medicare0.1 mi
Phillip Richardson, M.D.
Anesthesiology
NPI 1417961699
1100 W STEWART DR
Orange, CA 92868
(714) 633-9111
✔ PECOS✔ Accepts Medicare17 mi
Jessica Vaughn, MD
Anesthesiology
NPI 1821433624
8700 BEVERLY BLVD STE 8211
West Hollywood, CA 90048
(818) 571-6409
✔ PECOS20 mi
Andrew Hallmark
Anesthesiology
NPI 1255992855
251 E HURON ST
Chicago, IL 60611
(630) 933-4800
✔ PECOS✔ Accepts Medicare1,739 mi

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 Obstetric Anesthesia Associates Inc's NPI number?

The NPI number for Obstetric Anesthesia Associates Inc is 1184041857. It was assigned to this organization in the NPPES registry on March 19, 2014.

Where is Obstetric Anesthesia Associates Inc located?

Obstetric Anesthesia Associates Inc is located at 12401 Washington Blvd, Whittier, CA 90602. The listed phone number is (562) 698-0811.

What is Obstetric Anesthesia Associates Inc's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Obstetric Anesthesia Associates Inc enrolled in Medicare?

Yes. Obstetric Anesthesia Associates Inc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Obstetric Anesthesia Associates Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 5 clinicians, all in Anesthesiology, reassign their Medicare billing to Obstetric Anesthesia Associates Inc. 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. Of these, 1 practice at this address and 2 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 Obstetric Anesthesia Associates Inc was last updated on March 19, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.