MARY OCONNOR
NPI 1700840691
Internal Medicine in Seattle, WA
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
Specialties & Licenses
Secondary Practice Location 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
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.
Medicare Billing Reassignments
2Medicare enrollment records show Mary Oconnor reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Everett, WA 98201
- Reassigned Medicare billing, Washington enrollment
- 2,678 clinicians in this Medicare group
Seattle, WA 98125
- Reassigned Medicare billing, Washington enrollment
- 292 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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.
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.
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.
Which organizations bill Medicare for Mary Oconnor's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Oconnor reassigns Medicare benefits to 2 organizations: Kaiser Foundation Health Plan Of Washington (Everett, WA) and Neighborcare Health (Seattle, WA). Each 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 Mary Oconnor's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mary Oconnor accept?
Health plans from 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 weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Mary Oconnor · NPI 1700840691
Internal Medicine physician in Seattle, Washington. Individual provider, active in the CMS NPPES registry since April 17, 2006.
## Identity
- **NPI:** 1700840691 (Entity type: Individual)
- **Enumerated:** April 17, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 28887 (Washington)
- **Sole proprietor:** No
## Practice location
- **Address:** 3901 HOYT AVE, Seattle, WA 98201-4918
- **Phone:** (425) 259-0966
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Kaiser Foundation Health Plan Of Washington (NPI 1386935351, Everett, WA); Neighborcare Health (NPI 1679891402, Seattle, WA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Indiana University School Of Medicine, class of 1987
## Record status
- **NPPES last updated:** May 20, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1700840691) · Data from the CMS NPPES public registry.