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DR. MARGARET G. O'BYRNE M.D.
NPI 1366543159
Internal Medicine - Cardiovascular Disease in San Diego, CA

Active since September 26, 2006PECOS Enrolled
3811 VALLEY CENTRE DR, SAN DIEGO, CA 92130(858) 764-3000(858) 784-5933 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Dr. Margaret G. O'byrne M.d. NPPES

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

DR. MARGARET G. O'BYRNE M.D. (NPI 1366543159) is an individual cardiovascular disease provider in San Diego, California, licensed in California (G76683) and active in the NPI registry since September 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1366543159
Entity TypeIndividualFemale
Primary Taxonomy207RC0000X
Provider Legal NameDR. MARGARET G. O'BYRNECredential: M.D.
Location Address3811 VALLEY CENTRE DRSan Diego, CA 92130-3318
Mailing AddressFile 54433Los Angeles, CA 90074-0001 · (858) 784-5767 · Fax (858) 784-5933
Phone(858) 764-3000
Fax(858) 784-5933
Sole ProprietorNo
Enumeration DateSeptember 26, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1366543159 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RC0000X
License✔ Licensed in CA · G76683
Definition
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
3811 VALLEY CENTRE DR, San Diego, CA 92130
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Other Identifiers 2

Medicare UPINF29491CA
Medicare ID-Type UnspecifiedWG76683MCA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Margaret G. O'byrne M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92130 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$140.22 typical visit price
range $62.10 – $184.71
Typical copayment $35.05 (range $15.52 – $46.17)
Most-billed visit code 99204
Established Patient
$76.87 typical visit price
range $20.62 – $151.42
Typical copayment $19.21 (range $5.15 – $37.85)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ANDREW SHIN LAI MD
Internal Medicine
3811 VALLEY CENTRE DR
SAN DIEGO, CA 92130
San Diego County (858) 455-9100
DR. TODD M. HITCHCOCK M.D.
Internal Medicine (Cardiovascular Disease)
3811 VALLEY CENTRE DR
SAN DIEGO, CA 92130
San Diego County (858) 764-3110
MANDY HILLMER FNP-C, CPNP
Nurse Practitioner (Pediatrics)
3811 VALLEY CENTRE DR
SAN DIEGO, CA 92130
San Diego County (858) 764-3040
DR. RIO DION DICKENS M.D.
Internal Medicine
3811 VALLEY CENTRE DR
SAN DIEGO, CA 92130
San Diego County (858) 764-3000
DR. HOLLY E. HAUSER M.D.
Family Medicine
3811 VALLEY CENTRE DR
SAN DIEGO, CA 92130
San Diego County (858) 764-9081
MITCH BIERMANN
Internal Medicine
3811 VALLEY CENTRE DR
SAN DIEGO, CA 92130
San Diego County (858) 764-3320
DR. ILIA J.L. CHRISTY M.D.
Internal Medicine
3811 VALLEY CENTRE DR, S99
SAN DIEGO, CA 92130
San Diego County (858) 764-3000
ALISON CUSMANO FNP
Nurse Practitioner (Primary Care)
3811 VALLEY CENTRE DR
SAN DIEGO, CA 92130
San Diego County (858) 764-3100

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 Margaret O'byrne's NPI number?

The NPI number for Margaret O'byrne is 1366543159. It was assigned to this individual provider in the NPPES registry on September 26, 2006.

Where is Margaret O'byrne located?

Margaret O'byrne practices at 3811 Valley Centre Dr, San Diego, CA 92130. The listed phone number is (858) 764-3000.

What is Margaret O'byrne's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is Margaret O'byrne enrolled in Medicare?

Yes. Margaret O'byrne is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Margaret O'byrne was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.