MARY OCONNOR
NPI 1700840691
Internal Medicine in Seattle, WA

Active since April 17, 2006PECOS EnrolledAccepts Medicare Assignment
3901 HOYT AVE, SEATTLE, WA 98201(425) 259-0966 Get Directions Write a Review

NPPES record last updated: May 20, 2021. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: May 20, 2021, Aug 29, 2017 (2 updates tracked since 2017).

About Mary Oconnor NPPES

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

MARY OCONNOR (NPI 1700840691) is an individual internal medicine provider in Seattle, Washington, licensed in Washington (28887) and active in the NPI registry since April 2006. She is enrolled in Medicare PECOS, maintains a secondary practice location in Seattle, and is a graduate of Indiana University School Of Medicine (1987).

NPPES Registry Identity

NPI1700840691
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameMARY OCONNOR
Location Address3901 HOYT AVESeattle, WA 98201-4918
Mailing Address1200 12th Ave S, Ste 901Seattle, WA 98144-2712 · (206) 548-3114 · Fax (206) 762-6355
Sole ProprietorNo
Medical School CMSIndiana University School Of MedicineGraduated 1987
Enumeration DateApril 17, 2006
Last NPPES UpdateMay 20, 20212 updates tracked since enumeration
NPPES CertifiedMay 20, 2021
NPI 1700840691 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License Licensed in WA · 28887
Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

3901 HOYT AVE, Seattle, WA 98201

Secondary Practice Location 1

Location 1201 16th Ave ESeattle, WA 98112-5226 · Phone (206) 326-3000

Accepted Insurance

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

Mary Oconnor 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 ID244374114
PECOS Enrollment IDI20100216000088
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 98201 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
$130.99 typical visit price
range $57.27 – $172.80
Typical copayment $32.74 (range $14.31 – $43.20)
Most-billed visit code 99204
Established Patient
$100.78 typical visit price
range $18.56 – $141.11
Typical copayment $25.19 (range $4.64 – $35.27)
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 20

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

Family Medicine
3901 HOYT AVE
EVERETT, WA 98201
Nurse Practitioner (Family)
3901 HOYT AVE
EVERETT, WA 98201
Pediatrics
3901 HOYT AVE
EVERETT, WA 98201
Internal Medicine (Interventional Cardiology)
3901 HOYT AVE
EVERETT, WA 98201
Pediatrics (Pediatric Cardiology)
3901 HOYT AVE
EVERETT, WA 98201
Family Medicine (Geriatric Medicine)
3901 HOYT AVE
EVERETT, WA 98201
Internal Medicine (Rheumatology)
3901 HOYT AVE
EVERETT, WA 98201
Nurse Practitioner
3901 HOYT AVE
EVERETT, WA 98201

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 Oconnor's NPI number?

The NPI number for Mary Oconnor is 1700840691. It was assigned to this individual provider in the NPPES registry on April 17, 2006.

Where is Mary Oconnor located?

Mary Oconnor practices at 3901 Hoyt Ave, Seattle, WA 98201. The listed phone number is (425) 259-0966.

What is Mary Oconnor's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Mary Oconnor enrolled in Medicare?

Yes. Mary Oconnor 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.

What insurance does Mary Oconnor accept?

Health plans from PacificSource Health Plans, Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Mary Oconnor as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Mary Oconnor was last updated on May 20, 2021. NPI Profile syncs with the weekly NPPES data releases published by CMS.