Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Mark R. Johnson, MD

Individual provider Internal Medicine Physician · NPI 1578670931

Dr. Mark R. Johnson, MD is a Nephrology in Morristown, New Jersey. Graduated from New York University School of Medicine in 2003, 23 years ago. Practices with Practice Associates Medical Group, a 1,403-clinician group, accepts Medicare assignment and offers telehealth. Licensed in New Jersey.

Years since qualifying
23
Trained at
New York University School of Medicine
Licensed in
NJ
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

100 Madison Ave
Morristown, NJ 07960-6136
Phone: (973) 971-7165
Fax: (973) 290-7521
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nephrology Physician (primary) Taxonomy 207RN0300X · Licence 25MA08685600 (NJ)
Internal Medicine Physician Taxonomy 207R00000X · Licence 25MA08685600 (NJ)

Record details

NPI number1578670931
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 23, 2006
Last updated in NPPESJanuary 7, 2010
Mailing addressPo Box 23831, Newark, NJ 07189-0831

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNEPHROLOGY
Also practisesINTERNAL MEDICINE
Medical schoolNEW YORK UNIVERSITY SCHOOL OF MEDICINE
Graduated 2003 (23 years in practice)
Group practice Practice Associates Medical Group — 1403 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Other providers in Morristown