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Family Practice

Holly Bassler, DO

Works at hospitals in Ephrata, WA · Washington

Summary

Dr. Holly Bassler, DO is a family doctor at 200 Nat Washington Way, Ephrata, WA 98823. Phone: (509) 754-3330. Accepts Medicare assignment. In 2024, Holly Bassler had 18 Original Medicare patients and 28 services. NPI 1437103009. 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.

  • Specialty: Family doctor (Medicare lists Family Practice)
  • Address: 200 Nat Washington Way, Ephrata, WA 98823 · Directions (2 more locations)
  • Phone: (509) 754‑3330
  • Medicare: Accepts Medicare assignment
  • Hospital: Columbia Basin Hospital
  • Group practice: Optumcare New Mexico LLC (+1 more)
  • Medical school: graduated 2003 (23 years since medical school)
  • Gender (as listed): Female

From official Medicare data

This page shows what Medicare's official clinician data says about Holly Bassler, 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 Holly Bassler accept Medicare assignment?
Yes. Medicare's clinician data says Holly Bassler 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 Holly Bassler see?
In 2024, CMS data shows 18 Original Medicare patients and 28 services for Holly Bassler. This counts Original Medicare only and measures volume, not quality.
What is Holly Bassler's NPI number?
1437103009. 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 Holly Bassler, 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 patients18
Services billed to Medicare28
Different services or procedures10
Participating Medicare providerYes
Average age of these patients69

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).

  • Arthritis67%

Hospitals where Holly Bassler works

Medicare's Facility Affiliation Data lists Holly Bassler 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.

  • Columbia Basin HospitalEphrata, WA · Critical Access Hospital · Emergency services: listed by Medicare · CCN 501317

Practice locations

Addresses where Holly Bassler is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Holly Bassler as a member of these groups (CMS data updated October 2, 2026).

  • Optumcare New Mexico LLC66 clinicians in the group
  • Grant County Public Hospital District No. 322 clinicians in the group

Specialties

Find other Family Practice doctors in Washington →

Other family doctors in Ephrata

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

All family doctors in Ephrata →

Other clinicians in Optumcare New Mexico LLC

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

Clinician information

CredentialDO
Graduation year2003 (23 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1437103009
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