1. icon-arrow-left
    Find a Doctor
Mark R Johnson,  MD

Accepting New Patients

Mark R Johnson, MD

Nephrology

4.7
(123)

Male

Want to know your insurance options?

See Full List

About me

Mark Johnson, MD, is a nephrologist with Atlantic Medical Group Nephrology at Morristown. Board-certified in internal medicine and nephrology by the American Board of Internal Medicine, he completed fellowship-training in nephrology. His practice focuses on diagnosing, treating, and managing diseases and complications affecting the kidneys.

With nearly 20 years of clinical experience, including over 10 years as an attending hospitalist at Morristown Medical Center, Dr. Johnson understands that kidney disease can have a profound impact on patients. His practice focuses on kidney functioning and diseases and conditions that can affect kidney health such as kidney stones, chronic kidney disease and high blood pressure. Dr. Johnson is dedicated to treating underlying disease to help patients maintain an active and healthy lifestyle while preserving kidney health. He employs a patient-centered approach to delivering the highest quality care and takes the time to educate patients and loved ones on the options available for treatment.

After earning his degree from New York University School of Medicine, Dr. Johnson completed his residency at the Mount Sinai School of Medicine, NYC, and subsequently pursued fellowship training at Montefiore Medical Center/Albert Einstein College of Medicine, NYC. Dr. Johnson is a participating provider of the Atlantic Accountable Care Organization.

SPECIALTIES

  • Nephrology

AFFILIATIONS

  • Accountable Care Organization

  • Atlantic Medical Group

  • Morristown Medical Center

Where to see me

Insurance

Please contact the practice to confirm your health plan is accepted.

  • Aetna

  • Aetna Better Health

  • Aetna Exchange Plans (CVS)

  • Aetna Medicare Prime

  • Aetna Whole Health

  • AmBetter

  • Amerihealth

  • AmeriHealth Caritas VIP Care

  • AmeriHealth Regional Preferred Local Value

  • Brighton Health Plan Solutions

  • Education & Experience

    TRAINING

    New York University School of Medicine

    Medical School

    Montefiore Hospital and Medical Center

    Fellowship

    BOARD CERTIFICATIONS

    Internal Medicine

    American Board of Internal Medicine

    Nephrology

    American Board of Internal Medicine

    Patient Reviews

    OVERALL RATING

    4.7

    (123 ratings)
    9 reviews
    • 5.0
      Oct 10, 2025
      This was my first visit with Dr. Johnson and I am very pleased with the experience. Highly recommend this doctor and the staff.
    • 5.0
      Sep 24, 2025
      Dr Mark Johnson was very informed of my medical history, prescribed numerous tests to isolate areas of concern, he discussed all parameters and direction for medical care, future monitoring and guidance for good health.
    • 5.0
      Sep 24, 2025
      Positive/informative visit with Dr. Johnson.
    • 5.0
      Sep 15, 2025
      The staff is always friendly and respectful to me and the Dr. Dr Johnson has been wonderful I recommend him highly
    • 5.0
      Sep 12, 2025
      Dr Johnson explained everything layman's terms. He was very professional yet friendly. I felt very confident I was in very competent hands. Office staff very professional and friendly