CEDAR OB/GYN INC
NPI 1669432092
Obstetrics & Gynecology in Campbell, CA

Q: What is Mary Margaret O'neill MD Inc's NPI number?

The NPI number for Mary Margaret O'neill MD Inc is 1669432092. It was assigned to this organization in the NPPES registry on March 28, 2006. The provider is doing business as Cedar Ob/Gyn Inc.

Q: What is Mary Margaret O'neill MD Inc's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Active since March 28, 2006CLIA 05D1015071 · Microscopy

200 W CAMPBELL AVE, CAMPBELL, CA 95008(408) 583-0522(408) 583-0527 Get Directions Write a Review

NPPES record last updated: March 17, 2020. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Cedar Ob/gyn Inc NPPES

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

CEDAR OB/GYN INC (NPI 1669432092) is a healthcare organization registered as an obstetrics & gynecology in Campbell, California and active in the NPI registry since March 2006. The organization holds a CLIA Microscopy certificate valid through July 22, 2027 and lists Mary Margaret Oneill, President, as its authorized official.

NPPES Registry Identity

NPI1669432092

Entity TypeOrganization

Primary Taxonomy207V00000X

Legal Business NameMARY MARGARET O'NEILL MD INC

Location Address200 W CAMPBELL AVECampbell, CA 95008-1030

Mailing AddressPo Box 187Campbell, CA 95009-0187 · (408) 583-0522 · Fax (408) 583-0527

Phone(408) 583-0522

Fax(408) 583-0527

Organization SubpartNo

Authorized OfficialMary Margaret OneillPresident · (408) 583-0522

Enumeration DateMarch 28, 2006

Last NPPES UpdateMarch 17, 2020

NPPES CertifiedMarch 17, 2020

✔ NPI 1669432092 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians

Taxonomy Code207V00000X

License✔ Licensed in CA · G069694

Definition

An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.

200 W CAMPBELL AVE, Campbell, CA 95008

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Other Names 1

Doing Business AsCedar Ob/gyn Inc

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)

Cedar Ob/gyn Inc 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 Cedar Ob/Gyn Inc, which bills Medicare for the services this clinician delivers.

Clinician (1)

Mary O Neill, MD

Obstetrics/Gynecology

NPI 1215142419

200 W CAMPBELL AVE
Campbell, CA 95008

(408) 583-0522

✔ PECOS✔ Accepts MedicareSame address

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

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate for Provider-Performed Microscopy Procedures (PPMP) 05D1015071

Mary Margaret O'neill MD Inc · Campbell, CA

Active · expires Jul 22, 2027

CLIA Number05D1015071

Laboratory TypePhysician Office

Certificate Effective DateJuly 23, 2025

Certificate Expiration DateJuly 22, 2027

Laboratory DirectorMary Margaret O'neill MD

Laboratory Phone(408) 583-0522

Laboratory LocationMary Margaret O'neill MD Inc200 W Campbell Ave, Campbell, CA 95008

CLIA data matches this NPI record on: Address Name Phone

This certificate is issued to a laboratory in which a physician, midlevel practitioner or dentist performs no tests other than the microscopy procedures. This certificate permits the laboratory to also perform waived tests.

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 Mary Margaret O'neill MD Inc's NPI number?

The NPI number for Mary Margaret O'neill MD Inc is 1669432092. It was assigned to this organization in the NPPES registry on March 28, 2006. The provider is doing business as Cedar Ob/Gyn Inc.

Where is Mary Margaret O'neill MD Inc located?

Mary Margaret O'neill MD Inc is located at 200 W Campbell Ave, Campbell, CA 95008. The listed phone number is (408) 583-0522.

What is Mary Margaret O'neill MD Inc's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Mary Margaret O'neill MD Inc enrolled in Medicare?

Yes. Mary Margaret O'neill MD Inc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Mary Margaret O'neill MD Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Obstetrics/Gynecology) reassigns their Medicare billing to Mary Margaret O'neill MD 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Mary Margaret O'neill MD Inc hold a CLIA laboratory certificate?

Yes. A Certificate for Provider-Performed Microscopy Procedures (PPMP) (number 05D1015071) is associated with this NPI, valid through July 22, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Mary Margaret O'neill MD Inc was last updated on March 17, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.