Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Internal Medicine

Theodore A. Foster Iii, DO

Works at hospitals in Newberg, OR · Portland, OR · Seaside, OR … · Oregon

Summary

Dr. Theodore A. Foster Iii, DO is an internal medicine doctor at 1001 N Providence Dr, Newberg, OR 97132. Phone: (503) 537-5612. Accepts Medicare assignment. In 2024, Theodore A. Foster Iii had 1,809 Original Medicare patients and 2,576 services. NPI 1154646610. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

From official Medicare data

This page shows what Medicare's official clinician data says about Theodore A. Foster Iii, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Theodore A. Foster Iii accept Medicare assignment?
Yes. Medicare's clinician data says Theodore A. Foster Iii accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Theodore A. Foster Iii see?
In 2024, CMS data shows 1,809 Original Medicare patients and 2,576 services for Theodore A. Foster Iii. This counts Original Medicare only and measures volume, not quality.
What is Theodore A. Foster Iii's NPI number?
1154646610. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Theodore A. Foster Iii, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients1,809
Services billed to Medicare2,576
Different services or procedures36
Participating Medicare providerYes
Average age of these patients75

Most frequent services

  1. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)959 services
  2. Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)504 services
  3. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)205 services
  4. Ultrasound of heart, follow-up (93308)105 services
  5. Heart rhythm review and interpretation of continous external ekg over 8-15 days (93248)85 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High blood pressure75%
  • High cholesterol74%
  • Arthritis45%
  • Atrial fibrillation43%
  • Heart failure39%
  • Ischemic heart disease38%

Hospitals where Theodore A. Foster Iii works

Medicare's Facility Affiliation Data lists Theodore A. Foster Iii at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

Practice locations

Addresses where Theodore A. Foster Iii is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 18; the Medicare profile lists all.

Group practices

Medicare enrollment lists Theodore A. Foster Iii as a member of these groups (CMS data updated October 2, 2026).

  • Providence Health and Services Oregon1,433 clinicians in the group
  • Providence Health and Services - Oregon208 clinicians in the group
  • Providence Health and Services - Oregon191 clinicians in the group
  • Providence Health and Services Oregon97 clinicians in the group
  • Providence Health and Services - Oregon62 clinicians in the group
  • Providence Health and Services Oregon53 clinicians in the group

Specialties

Find other Internal Medicine doctors in Oregon →

Other internal medicine doctors in Newberg

Clinicians with the same Medicare primary specialty in Newberg, OR — not a recommendation.

All internal medicine doctors in Newberg →

Other clinicians in Providence Health and Services Oregon

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialDO
Graduation year2010 (16 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1154646610
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians