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Family Practice

Gary B. Kershner, DO

Works at hospitals in Morristown, NJ · Summit, NJ · New Jersey

Summary

Dr. Gary B. Kershner, DO is a family doctor at 100 Madison Ave, Morristown, NJ 07960. Phone: (973) 971-5596. Accepts Medicare assignment. In 2024, Gary B. Kershner had 244 Original Medicare patients and 1,008 services. NPI 1518937234. 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: 100 Madison Ave, Morristown, NJ 07960 · Directions (1 more location)
  • Phone: (973) 971‑5596
  • Medicare: Accepts Medicare assignment
  • Hospitals: Morristown Medical Center, Overlook Medical Center
  • Group practice: Practice Associates Medical Group
  • Medical school: Rowan University School Of Osteopathic Medicine · graduated 2000 (26 years since medical school)
  • Gender (as listed): Male
  • Telehealth: offered

From official Medicare data

This page shows what Medicare's official clinician data says about Gary B. Kershner, 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 Gary B. Kershner accept Medicare assignment?
Yes. Medicare's clinician data says Gary B. Kershner 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 Gary B. Kershner see?
In 2024, CMS data shows 244 Original Medicare patients and 1,008 services for Gary B. Kershner. This counts Original Medicare only and measures volume, not quality.
What is Gary B. Kershner's NPI number?
1518937234. 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 Gary B. Kershner, 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 patients244
Services billed to Medicare1,008
Different services or procedures39
Participating Medicare providerYes
Average age of these patients72

Most frequent services

  1. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)286 services
  2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)161 services
  3. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)125 services
  4. Administration of influenza virus vaccine (G0008)66 services
  5. Influenza vaccine split virus, preservative free (90662)61 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 cholesterol75%
  • High blood pressure73%
  • Arthritis34%
  • Diabetes29%
  • Ischemic heart disease19%
  • Anxiety18%

Hospitals where Gary B. Kershner works

Medicare's Facility Affiliation Data lists Gary B. Kershner 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.

  • Morristown Medical CenterMorristown, NJ · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 310015
  • Overlook Medical CenterSummit, NJ · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 310051

Practice locations

Addresses where Gary B. Kershner is enrolled with Medicare (CMS data updated October 2, 2026).

  • 100 Madison AveMorristown, NJ 07960 (973) 971‑5596
  • 1000 Galloping Hill RdUnion, NJ 07083

Group practices

Medicare enrollment lists Gary B. Kershner as a member of this group (CMS data updated October 2, 2026).

  • Practice Associates Medical Group1,408 clinicians in the group

Specialties

Find other Family Practice doctors in New Jersey →

Other family doctors in Morristown

Clinicians with the same Medicare primary specialty in Morristown, NJ — not a recommendation.

All family doctors in Morristown →

Other clinicians in Practice Associates Medical Group

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

Clinician information

CredentialDO
Medical schoolRowan University School Of Osteopathic Medicine
Graduation year2000 (26 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1518937234
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