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Physician Assistant

William S. Ennis Jr., MD

Works at hospitals in Salisbury, MD · Maryland

Summary

Dr. William S. Ennis Jr., MD is a physician assistant at 914 A Eastern Shore Dr, Salisbury, MD 21804. Phone: (410) 543-1331. Accepts Medicare assignment. In 2024, William S. Ennis Jr. had 566 Original Medicare patients and 2,520 services. NPI 1407199706. 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 William S. Ennis Jr., 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 William S. Ennis Jr. accept Medicare assignment?
Yes. Medicare's clinician data says William S. Ennis Jr. 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 William S. Ennis Jr. see?
In 2024, CMS data shows 566 Original Medicare patients and 2,520 services for William S. Ennis Jr.. This counts Original Medicare only and measures volume, not quality.
What is William S. Ennis Jr.'s NPI number?
1407199706. 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 William S. Ennis Jr., 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 patients566
Services billed to Medicare2,520
Different services or procedures30
Participating Medicare providerYes
Average age of these patients71

Most frequent services

  1. Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)1,263 services
  2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)771 services
  3. Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)95 services
  4. Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus (87426)65 services
  5. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)49 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 cholesterol75%
  • Arthritis49%
  • Diabetes44%
  • Depression39%
  • Anxiety39%

Hospitals where William S. Ennis Jr. works

Medicare's Facility Affiliation Data lists William S. Ennis Jr. 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 William S. Ennis Jr. is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists William S. Ennis Jr. as a member of this group (CMS data updated October 2, 2026).

  • Eastern Shore Medical Center PA6 clinicians in the group

Specialties

Find other Physician Assistant doctors in Maryland →

Other physician assistants in Salisbury

Clinicians with the same Medicare primary specialty in Salisbury, MD — not a recommendation.

All physician assistants in Salisbury →

Other clinicians in Eastern Shore Medical Center PA

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

Clinician information

CredentialMD
Graduation year2012 (14 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1407199706
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