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TIMOTHY W STEWART MD
NPI 1669455952
Obstetrics & Gynecology in Hillsboro, OR

Active since November 21, 2005PECOS Enrolled
364 SE 8TH AVE STE 205, HILLSBORO, OR 97123(503) 681-4145(503) 681-4146 Get Directions Write a Review

NPPES record last updated: May 14, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 14, 2021, Apr 20, 2021 (2 updates tracked since 2021).

About Timothy W Stewart Md NPPES

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

TIMOTHY W STEWART MD (NPI 1669455952) is an individual obstetrics & gynecology provider in Hillsboro, Oregon, licensed in Oregon (MD14489) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1669455952
Entity TypeIndividualMale
Primary Taxonomy207V00000X
Provider Legal NameTIMOTHY W STEWARTCredential: MD
Location Address364 SE 8TH AVE STE 205Hillsboro, OR 97123-4249
Mailing Address12215 Nw Laidlaw RdPortland, OR 97229-2562 · (503) 804-5845 · Fax (503) 297-6590
Phone(503) 681-4145
Fax(503) 681-4146
Sole ProprietorNo
Enumeration DateNovember 21, 2005
Last NPPES UpdateMay 14, 20212 updates tracked since enumeration
NPPES CertifiedApril 20, 2021
✔ NPI 1669455952 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in OR · MD14489
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.
364 SE 8TH AVE STE 205, Hillsboro, OR 97123
Open in Google Maps ↗

Other Identifiers 2

OtherR106585OR · Medicare Ptan
Medicaid213660OR

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Moda Health Plan, Inc..Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Timothy W Stewart Md 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.

Medicare Billing Reassignments

4

Medicare enrollment records show Timothy Stewart reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Tuality Medical Group LLC
Same address
Neurology
364 SE 8TH AVE STE 101
Hillsboro, OR 97123
  • Reassigned Medicare billing, Oregon enrollment
  • 691 clinicians in this Medicare group
NPI 1639690704 (503) 681-1000
Northwest Medical Foundation Of Tillamook
9.1 mi
Rural Health
12350 NW MAIN ST STE 112
Banks, OR 97106
  • Reassigned Medicare billing, Oregon enrollment
  • 206 clinicians in this Medicare group
NPI 1043740616 (503) 842-4444
Silverton Health
26 mi
Clinic/Center
1475 MT. HOOD AVE
Woodburn, OR 97071
  • Reassigned Medicare billing, Oregon enrollment
  • 568 clinicians in this Medicare group
NPI 1215347109 (971) 983-5214
Saint Alphonsus Medical Center- Ontario Inc
312 mi
Internal Medicine
1050 SW 3RD AVE, STE 3200
Ontario, OR 97914
  • Reassigned Medicare billing, Oregon enrollment
  • 49 clinicians in this Medicare group
NPI 1093034159 (541) 881-7370

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 97123 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
$134.16 typical visit price
range $58.99 – $176.88
Typical copayment $33.54 (range $14.74 – $44.22)
Most-billed visit code 99204
Established Patient
$73.28 typical visit price
range $19.32 – $144.79
Typical copayment $18.32 (range $4.83 – $36.19)
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 5

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

TUALITY HEALTHCARE
Clinic/Center
364 SE 8TH AVE STE 205
HILLSBORO, OR 97123
Washington County (503) 681-4145
GISELLE RODRIGUEZ PALOMARES
Community Health Worker
364 SE 8TH AVE STE 205
HILLSBORO, OR 97123
Washington County (503) 681-4134
LISHIANA S. SHAFFER MD
Obstetrics & Gynecology
364 SE 8TH AVE STE 205
HILLSBORO, OR 97123
Washington County (503) 681-4145
JENNIFER L. WRIGHT CNM
Advanced Practice Midwife
364 SE 8TH AVE STE 205
HILLSBORO, OR 97123
Washington County (503) 681-4145
JANELLE MARIE POTTS CNM
Advanced Practice Midwife
364 SE 8TH AVE STE 205
HILLSBORO, OR 97123
Washington County (503) 681-4250

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 Timothy Stewart's NPI number?

The NPI number for Timothy Stewart is 1669455952. It was assigned to this individual provider in the NPPES registry on November 21, 2005.

Where is Timothy Stewart located?

Timothy Stewart practices at 364 SE 8th Ave Ste 205, Hillsboro, OR 97123. The listed phone number is (503) 681-4145.

What is Timothy Stewart's specialty?

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

Is Timothy Stewart enrolled in Medicare?

Yes. Timothy Stewart is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Timothy Stewart's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Timothy Stewart reassigns Medicare benefits to 4 organizations: Tuality Medical Group LLC (Hillsboro, OR), Northwest Medical Foundation Of Tillamook (Banks, OR), Silverton Health (Woodburn, OR) and Saint Alphonsus Medical Center- Ontario Inc (Ontario, OR). 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 Timothy Stewart's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Timothy Stewart accept?

Health plans from Moda Health Plan, Inc. list Timothy Stewart 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 Timothy Stewart was last updated on May 14, 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.