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Emergency Medicine

Theodore C. Weatherwax, MD

Works at hospitals in Sunnyside, WA · Boston, MA · Rosebud, SD · Washington, Massachusetts, South Dakota

Summary

Dr. Theodore C. Weatherwax, MD is an emergency medicine doctor at 1016 Tacoma Ave, Sunnyside, WA 98944. Phone: (509) 837-1707. Accepts Medicare assignment. In 2024, Theodore C. Weatherwax had 61 Original Medicare patients and 113 services. NPI 1144882879. 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 C. Weatherwax, 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 C. Weatherwax accept Medicare assignment?
Yes. Medicare's clinician data says Theodore C. Weatherwax 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 C. Weatherwax see?
In 2024, CMS data shows 61 Original Medicare patients and 113 services for Theodore C. Weatherwax. This counts Original Medicare only and measures volume, not quality.
What is Theodore C. Weatherwax's NPI number?
1144882879. 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 C. Weatherwax, 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 patients61
Services billed to Medicare113
Different services or procedures30
Participating Medicare providerYes
Average age of these patients66

Most frequent services

  1. Emergency department visit with low level of medical decision making (99283)17 services
  2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)14 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 pressure69%
  • High cholesterol51%
  • Diabetes46%
  • Arthritis43%
  • Anxiety43%
  • Depression38%

Hospitals where Theodore C. Weatherwax works

Medicare's Facility Affiliation Data lists Theodore C. Weatherwax 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 C. Weatherwax is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

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

  • Massachusetts General Physicians Organization Inc3,558 clinicians in the group
  • Rosebud Indian Health Service72 clinicians in the group
  • Sunnyside Emergency Group a Professional LLC15 clinicians in the group

Specialties

Find other Emergency Medicine doctors in Washington →

Other emergency medicine doctors in Sunnyside

Clinicians with the same Medicare primary specialty in Sunnyside, WA — not a recommendation.

All emergency medicine doctors in Sunnyside →

Other clinicians in Massachusetts General Physicians Organization Inc

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

Clinician information

CredentialMD
Medical schoolUniversity Of New Mexico School Of Medicine
Graduation year2018 (8 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1144882879
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