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Hematology Specialist, Oncology Specialist (cancer)
18 years of experience
Video profile
Accepting new patients
License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Patient Reviews

  • Currently 3.5 of 4 stars
Patient comments (2)

The overall average patient rating of Dr. John Wallmark is Excellent. Dr. Wallmark has been reviewed by 3 patients who have provided 2 comments. The rating is 3.5 out of 4 stars.

Patient Ratings
Ease of Appointment 2.5
  • Currently 2.5 of 4 stars
Promptness 3.0
  • Currently 3 of 4 stars
Courteous Staff 3.3
  • Currently 3.3333333333333 of 4 stars
Accurate Diagnosis 3.0
  • Currently 3 of 4 stars
Bedside Manner 3.7
  • Currently 3.6666666666667 of 4 stars
Spends Time with Me 3.0
  • Currently 3 of 4 stars
Follows Up After Visit 2.7
  • Currently 2.6666666666667 of 4 stars

Specialties & Research

Dr. John Wallmark, MD is board certified in Hematology and Medical Oncology.

  • He has special expertise in 1 area:
  • Adult T-Cell Leukemia-Lymphoma

Education & Awards

Dr. Wallmark graduated from Drexel University , Philadelphia.


Dr. Wallmark has 6 hospital affiliations:

  • Holy Cross Hospital 
  • Washington Adventist Hosp 


  • Nepali
  • Tagalog
  • Spanish
  • Greek
  • Bengali
  • Russian
  • Hindi
  • Chinese

> > > > Dr. John Wallmark, MD

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Additional Information
Dr. John Michael Wallmark MD is a male Hematologist, has 18 years of experience and practices in Hematology and Medical Oncology.
Where does Dr. John M. Wallmark practice?
Dr. John Wallmark has 2 office locations.
Dr. John Wallmark practices Hematology and Medical Oncology near Rockville, MD.
Additional practice locations include: Bethesda, MD.
See Rockville Hematologists and Rockville Oncologists.