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Internal Medicine

Duane G. Sossong, DO

Works at hospitals in Hackettstown, NJ · Morristown, NJ · Denville, NJ · New Jersey

Summary

Duane G. Sossong, DO (Internal Medicine) is listed by Medicare at 3 hospitals in Hackettstown, NJ, Morristown, NJ and Denville, NJ. NPI 1720021488. Medicare data says the clinician accepts Medicare assignment. Source: CMS Facility Affiliation Data, updated 2026-10-02.

From official Medicare data

This page shows what Medicare's official clinician data says about Duane G. Sossong, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

Internal MedicinePrimary specialty
YesAccepts Medicare assignment
42Years since medical school (graduated 1984)
Midwestern University, Chicago College Of Osteopathic MedMedical school
MaleGender (as listed)

Quick answers

Which hospitals does Duane G. Sossong work at?
Medicare's official clinician data lists Duane G. Sossong at 3 hospitals: Ahs Hospital Corp, Morristown Medical Center and Saint Clare's Hospital/ Denville Campus. This is where the clinician works or has privileges; call the hospital to confirm.
Where does Duane G. Sossong see patients?
Medicare's clinician data lists 1 practice location in Randolph, NJ. Call before your visit to confirm the address.
What is Duane G. Sossong's specialty?
Medicare lists Internal Medicine as the primary specialty.
Does Duane G. Sossong accept Medicare assignment?
Yes. Medicare's clinician data says Duane G. Sossong accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
What is the phone number for Duane G. Sossong?
(973) 366-1789, as listed in official Medicare / NPI Registry data.
What is Duane G. Sossong's NPI number?
1720021488. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Duane G. Sossong works

Medicare's Facility Affiliation Data lists Duane G. Sossong at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.

Practice locations

Addresses where Duane G. Sossong is enrolled with Medicare (CMS data updated 2026-10-02).

Specialties

Find other Internal Medicine doctors in New Jersey →

Other internal medicine doctors in New Jersey

Clinicians with the same Medicare primary specialty in New Jersey — not a recommendation.

All internal medicine doctors in New Jersey →

Clinician information

CredentialDO
Medical schoolMidwestern University, Chicago College Of Osteopathic Med
Graduation year1984
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1720021488
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 2026-10-02, retrieved 2026-10-29
  2. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  3. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  4. Medicare Care Compare — official Medicare tool to look up clinicians