MARGARET MARY O'CONNOR GNP-BC
NPI 1538202452
Nurse Practitioner - Gerontology in Saint Helena, CA

Q: What is Margaret O'connor's NPI number?

The NPI number for Margaret O'connor is 1538202452. It was assigned to this individual provider in the NPPES registry on February 14, 2007.

Q: What is Margaret O'connor's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Gerontology, with taxonomy code 363LG0600X.

Q: When was this NPI record last updated?

The NPPES record for Margaret O'connor was last updated on May 4, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.

Active since February 14, 2007PECOS EnrolledAccepts Medicare Assignment

6 WOODLAND RD STE 101, SAINT HELENA, CA 94574(707) 963-7028(707) 963-7255 Get Directions Write a Review

NPPES record last updated: May 4, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: May 4, 2026, Nov 10, 2021, Apr 6, 2021 and 4 more (7 updates tracked since 2019).

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About Margaret Mary O'connor Gnp-bc NPPES

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

MARGARET MARY O'CONNOR GNP-BC (NPI 1538202452) is an individual gerontology provider in Saint Helena, California, licensed in California (95031336) and active in the NPI registry since February 2007. She is enrolled in Medicare PECOS and is a graduate of Other (2006).

NPPES Registry Identity

NPI1538202452

Entity TypeIndividualFemale

Primary Taxonomy363LG0600X

Provider Legal NameMARGARET MARY O'CONNORCredential: GNP-BC

Location Address6 WOODLAND RD STE 101Saint Helena, CA 94574-9501

Mailing Address6 Woodland Rd Ste 101Saint Helena, CA 94574-9501 · (707) 963-7028 · Fax (707) 963-7255

Phone(707) 963-7028

Fax(707) 963-7255

Sole ProprietorNo

Medical School CMSOtherGraduated 2006

Enumeration DateFebruary 14, 2007

Last NPPES UpdateMay 4, 20267 updates tracked since enumeration

NPPES CertifiedMay 4, 2026

✔ NPI 1538202452 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse Practitioner · GerontologyPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363LG0600X

Licenses✔ Licensed in CA · 95031336✔ Licensed in FL · APRN3104612

Also ListedNurse Practitioner · Adult HealthTaxonomy 363LA2200X · License ARNP3104612 (FL)

6 WOODLAND RD STE 101, Saint Helena, CA 94574

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Other Identifiers 2

OtherP00471142FL · Railroad Medicare

Medicaid308810300FL

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Margaret Mary O'connor Gnp-bc is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1254436546

PECOS Enrollment IDI20241004001748

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.

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

125 services125 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

32 services28 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94574 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

$98.97 typical visit price

range $65.08 – $192.16

Typical copayment $24.74 (range $16.27 – $48.04)

Most-billed visit code 99203

Established Patient

$113.15 typical visit price

range $21.86 – $157.83

Typical copayment $28.28 (range $5.46 – $39.45)

Most-billed visit code 99214

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 3

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

ADVENTIST HEALTH PHYSICIANS NETWORK

Surgery

6 WOODLAND RD STE 101
SAINT HELENA, CA 94574

Napa County (707) 963-6111

TERRIE ANNE GUTIERREZ RN

Registered Nurse

6 WOODLAND RD STE 101
SAINT HELENA, CA 94574

Napa County (707) 963-6111

DR. JUAN C VASQUEZ MD

Surgery

6 WOODLAND RD STE 101
SAINT HELENA, CA 94574

Napa County (707) 963-6111

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'connor's NPI number?

The NPI number for Margaret O'connor is 1538202452. It was assigned to this individual provider in the NPPES registry on February 14, 2007.

Where is Margaret O'connor located?

Margaret O'connor practices at 6 Woodland Rd Ste 101, Saint Helena, CA 94574. The listed phone number is (707) 963-7028.

What is Margaret O'connor's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Gerontology, with taxonomy code 363LG0600X.

Is Margaret O'connor enrolled in Medicare?

Yes. Margaret O'connor is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Margaret O'connor was last updated on May 4, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.