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

Internal Medicine

Clinton P. Sonier, MD

Works at hospitals in Ephrata, PA · Lebanon, PA · York, PA · Pennsylvania

Summary

Dr. Clinton P. Sonier, MD is an internal medicine doctor at 169 Martin Ave, Ephrata, PA 17522. Phone: (717) 721-4740. Accepts Medicare assignment. NPI 1750025144. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026.

From official Medicare data

This page shows what Medicare's official clinician data says about Clinton P. Sonier, 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 Clinton P. Sonier accept Medicare assignment?
Yes. Medicare's clinician data says Clinton P. Sonier 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.
What is Clinton P. Sonier's NPI number?
1750025144. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Clinton P. Sonier works

Medicare's Facility Affiliation Data lists Clinton P. Sonier 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 Clinton P. Sonier is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Clinton P. Sonier as a member of this group (CMS data updated October 2, 2026).

  • WellSpan Medical Group2,480 clinicians in the group

Specialties

Find other Internal Medicine doctors in Pennsylvania →

Other internal medicine doctors in Ephrata

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

All internal medicine doctors in Ephrata →

Other clinicians in WellSpan Medical Group

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

Clinician information

CredentialMD
Graduation year2022 (4 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1750025144
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. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  5. Medicare Care Compare — official Medicare tool to look up clinicians