Browse Health
Hematology Specialist, Oncology Specialist (cancer)
20 years of experience
Accepting new patients
Video profile
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

Patient comments (3)

The overall average patient rating of Dr. John Wallmark is Good. Dr. Wallmark has been reviewed by 10 patients who have provided 3 comments. The rating is 4 out of 5 stars.

Patient Ratings
Ease of Appointment 4.4
Promptness 4.2
Courteous Staff 4.5
Accurate Diagnosis 4.4
Bedside Manner 4.5
Spends Time with Me 4.4
Follows Up After Visit 3.9

Specialties & Research

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

  • He has special expertise in 8 areas:
  • Acute Myeloid Leukemia
  • Adult T-Cell Leukemia-Lymphoma
  • Cancer
  • Chronic Myeloid Leukemia
  • Chronic Myelomonocytic Leukemia
  • Deep Vein Thrombosis
  • Hepatitis C
  • Leukemia

Education & Awards

Dr. Wallmark graduated from Drexel University , Philadelphia.


Dr. Wallmark has 6 hospital affiliations:

  • Washington Adventist Hosp 
  • Holy Cross Hospital 


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

> > > > Dr. John Wallmark, MD

Similar doctors nearby

Dr. James Brown

Internal Medicine
45 years experience
Rockville, MD

Dr. Shannon O'Connor

Rockville, MD

Dr. Chitra Rajagopal

28 years experience
Rockville, MD

Dr. Anu Kurichh

Anatomic Pathology & Clinical Pathology
45 years experience
Rockville, MD

Dr. Sophia Untiveros

Internal Medicine
41 years experience
Gaithersburg, MD

Dr. Joseph Fratantoni

Internal Medicine
47 years experience
Rockville, MD
Search All Similar Doctors
Additional Information
Dr. John Michael Wallmark MD is a male Hematologist, has 20 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.