1. Hematologists
  2. MD
  3. Rockville, MD
  4. Dr. John Wallmark, MD

Dr. John Wallmark, MD

Hematology•Male•Age 59

Hematology

Dr. John Wallmark, MD is a hematology specialist in Rockville, MD and has over 30 years of experience in the medical field. He graduated from Hahnemann School of Medicine, Allegheny University of Health Sciences in 1992. He is affiliated with medical facilities Adventist Healthcare Shady Grove Medical Center and Suburban Hospital. His office is not accepting new patients.

Dr. John Wallmark, MD

Maryland Oncology - Rockville

9905 Medical Center Dr Ste 200 Rockville, MD 20850
Telehealth services available

Make an Appointment

(301) 424-6231
ShareSave
Telehealth services available
(301) 424-6231
  • Explains Conditions Well
    Patients said this doctor explains conditions well. • See reviews
  • Offers Telehealth
    This provider offers telehealth appointments. Call the office to schedule an appointment.
  • Practices at Top Hospital
    America's 250 Best Hospitals Award™ • See hospitals
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Experience and Background Checks

Experience
Background

Background Check

No malpractice claims found for Maryland
No disciplinary actions found for the years we collect data
No board actions found for the years we collect data
Learn more about background checks

Experience Check

Check Dr. Wallmark's experience treating your condition or procedure

Dr. Wallmark's Top Procedures and Conditions

Treatment Frequency
Anemia
high
high

Treatment Frequency

Dr. Wallmark treats Anemia more than 94% of his peers

Dr. Wallmark treats this condition more than 94% of his peers

Rating Includes other areas of care:

  • Acquired Aplastic Anemia
  • Anemia of Pregnancy
  • Aplastic Anemia
  • Atypical Hemolytic Uremic Syndrome
  • Autoimmune Hemolytic Anemia (AIHA)
  • Chronic Anemia
  • Cold Autoimmune Hemolytic Anemia
  • D-Negative Hemolytic Uremic Syndrome (D - HUS)
  • D-Negative Hemolytic Uremic Syndrome, Pregnancy Related
  • D-Positive Hemolytic Uremic Syndrome (D + HUS)
  • Diamond-Blackfan Anemia
  • Hemolytic Anemia, Acquired Autoimmune
  • Hemolytic Uremic Syndrome
  • Hereditary Spherocytosis
  • Iron Deficiency Anemia
  • Megaloblastic Anemia
  • Microcytic Hypochromic Anemia
  • Myelpathic Anemia
  • Neonatal Anemia
  • Nutritional Anemia
  • Nutritional Sideroblastic Anemia
  • Pernicious Anemia
  • Refractory Anemia With Excess Blasts
  • Refractory Anemia With Excess Blasts-1
  • Refractory Anemia With Excess Blasts-2
  • Secondary Cold Autoimmune Hemolytic Anemia
  • Sideroblastic Anemia
  • Sideroblastic Anemia With Spinocerebellar Ataxia
  • Sideroblastic Anemia, Pyridoxine-Responsive, Autosomal Recessive
  • Warm Autoimmune Hemolytic Anemia
Hide other areas of care
Learn more about Anemia
Neutropenia
high
high

Treatment Frequency

Dr. Wallmark treats Neutropenia more than 90% of his peers

Dr. Wallmark treats this condition more than 90% of his peers

Rating Includes other areas of care:

  • Chronic Autoimmune Neutropenia
  • Chronic Benign Neutropenia
  • Chronic Neutropenia
  • Chronic Severe Neutropenia
  • Cyclic Neutropenia
  • Idiopathic Chronic Severe Neutropenia
  • Idiopathic Neutropenia, Adult
Hide other areas of care
Deep Vein Thrombosis (DVT)
normal
normal

Treatment Frequency

Dr. Wallmark treats Deep Vein Thrombosis (DVT) more than 80% of his peers

Dr. Wallmark treats this condition more than 80% of his peers

Learn more about Deep Vein Thrombosis (DVT)
Learn more about experience ratings

Dr. Wallmark's conditions and procedures:

  • Anemia
  • Neutropenia
  • Deep Vein Thrombosis (DVT)
  • Acute Leukemia
  • Acute Myeloid Leukemia
  • Antiphospholipid Syndrome (APS)
  • Bleeding Disorders
  • Central Nervous System Lymphoma
  • Chronic Lymphocytic Leukemia
  • Chronic Myeloid Leukemia (CML)
  • Coagulation Disorders (incl. Hemophilia)
  • Hemophilia
  • Hypercoagulable State
  • Immune Thrombocytopenic Purpura (ITP)
  • Leukocytosis
  • Lymphoma
  • Lymphoma, Large Cell, Anaplastic
  • Myelodysplastic Syndromes
  • Myeloma
  • Myeloproliferative Disorders
  • Non-Hodgkin's Lymphoma
  • Pancytopenia
  • Polycythemia Rubra Vera
  • Primary Central Nervous System Lymphoma
  • Primary Hypercoagulable State (incl. Factor V Leiden Disease)
  • Purpura
  • Sickle Cell Disease
  • Thalassemia
  • Thrombocytosis
  • Venous Embolism and Thrombosis
  • Vitamin B Deficiency
  • Vitamin B12 Deficiency
  • von Willebrand Disease
  • Bone Marrow Biopsy

Insurance Check

Search for your insurance provider

Dr. Wallmark accepts

Accepted insurance can change. Please double-check when making an appointment.

(301) 424-6231

Dr. Wallmark accepts the following insurance:

Aetna
Aetna HMO
Choice Plus POS II
Select
Anthem
National (BlueCard) PPO
Anthem Blue Cross Blue Shield
KeyCare PPO
Blue Cross Blue Shield
Blue Card PPO
CareFirst Blue Cross Blue Shield
Blue Choice Advantage
Blue Preferred PPO
CareFirst Maryland POS
HealthyBlue 2.0
HealthyBlue Advantage
Cigna
Cigna HMO
Cigna PPO
Open Access Plus
First Health
First Health (Coventry Health Care) PPO
MultiPlan
MultiPlan PPO

Dr. Wallmark's Reviews

Likelihood to recommend Dr. Wallmark

4.8

Based on 73 ratings

5 Star
90%
90%
4 Star
4%
4%
3 Star
0%
0%
2 Star
3%
3%
1 Star
3%
3%
What went well
No reviews yet
What could be improved
No reviews yet

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RecentHighestLowestMost Helpful
Reply
Good informational visit
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Jan 20, 2023
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Reply
Excellent Provider
Dr Wallmark is very easy to talk to. He took time to answer all my questions, which were a lot. My consult was not rushed. He explained my treatment plan so I could understand everything and he has had periodic visits with me throughout my treatment. Highly recommend.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Patricia V Stoute – Dec 02, 2022
We are happy to hear you have had such a positive...Read More
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Reply
He is very empathetic and bright
I have CLL and I find him to be very helpful and through. And his infusion nurses Aaron Cornine Rose and Kevin are fabulous!!!
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Oct 31, 2022
Thank you for taking the time to share your...Read More
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Reply
Very likely to recommend him he is caring and unde
Always informative and great manner. Never have to wait all who work there are outstanding
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Oct 28, 2022
Thank you for taking the time to share your...Read More
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Reply
Dr Wallmark is upbeat and easy to talk to. I never feel rushed. He’s happy to answer my questions
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Rochelle Sherman – Oct 27, 2022
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Reply
Dr. Wallmark was courteous and discussed my option
There was mix up in that they originally forgot to draw blood before I saw Dr. Wallmark.
What went well
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Oct 27, 2022
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Reply
I've moved to Chevy Chase from Richmond, VA and had to get an oncologist right away. From my Blue Cross list of provicers I chose Dr. Wallmark. I have subsequently found an office much closer to where I now live and had to explain to Dr. W. that I just needed this appt to get my chemo meds before I changed doctors. He was very understanding and accomodating. I was impressed with his care and would certainly continue with him if circumstances permitted. All in all it was a very positive experience.
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Susan Falbo – Oct 24, 2022
Thank you for taking the time to share your...Read More
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Reply
The most caring of physicians
Dr. Wallmark listens with care and responds with compassion. I am so grateful that he is my oncologist! We’ve been through a lot together.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Oct 20, 2022
Thank you for taking the time to share your...Read More
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Reply
Review for Dr Wallmark
Cancer Consultation
What went well
  • Office environment
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
  • Difficult to schedule appointment
  • Long wait times
Helpful
Oct 15, 2022
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Reply
Outstanding Hematologist
Doctor Wallmark has me take a blood test when I arrive and then reviews the results with me. When I leave I feel very confident that I am under very good care with a caring doctor
What went well
No results
What could be improved
No results
Helpful
Oct 14, 2022
Thank you for taking the time to share your...Read More
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Reply
Follow up with prolia injection. Regular exam.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Janet Argentiero – Oct 12, 2022
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Reply
Excellent care and treatment!
I visited Dr Wallmark after I was admitted from the emergency room. He methodically analyzed my problem and found a solution for it. He did not rush through my visit sessions but carefully examined all the reports and did his job with an amazing expertise and compassion.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
D. Demissie – Oct 07, 2022
Thank you for taking the time to share your...Read More
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Reply
Brief meeting to discuss my future treatment
What went well
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
What could be improved
  • Long wait times
Helpful
Sep 29, 2022
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Reply
Helpful and honest
He was full of knowledge but also open to my suggestions.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Sep 25, 2022
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Reply
Dr Wallmark is outstanding in his knowledge of and caring concern for the whole patient.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Sep 10, 2022
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Reply
Excellent, caring physician
5 year post cancer check up. I am alive today because of Dr Wallmark and others on his team.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Sep 09, 2022
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Reply
Dr Wallmark and clinic were outstanding. Did the blood analysis on site within five minutes. Providing needed info quickly.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
MR – Sep 09, 2022
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Reply
Very professional and compassionate
Very thorough asks about the whole of me and how I am dojng
What went well
  • Office environment
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
  • Difficult to schedule appointment
  • Long wait times
Helpful
Cathy WELSCH – Sep 09, 2022
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Reply
I’ve been a patient of Dr Wallmark for many years and have always appreciated the care he has given me. And I’m thankful.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Rae Johnson – Sep 01, 2022
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Reply
It was a pleasure to meet Dr. Wallmark on my first visit with him. He reviewed my lab results with me and was able to answer all my questions satisfactorily.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Aug 30, 2022
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About Me

Biography

Dr. John Wallmark, MD is a Hematology Specialist in Rockville, MD and has over 31 years of experience in the medical field. He graduated from Hahnemann...Read more

Specialties

  • Hematology
  • Medical Oncology

Education

University Of Nc Hosps
Residency Hospital
University Of Nc Hosps|University Of Pa Health System
Residency Hospital
University Of Pa Health System
Residency Hospital
1992
Hahnemann School of Medicine, Allegheny University of Health Sciences
Medical School
,

Frequently Asked Questions

What is the best way to schedule an appointment with Dr. John Wallmark, MD?

Find contact information here to make an appointment.

Does Dr. John Wallmark, MD accept any insurance plans?

A list of accepted insurance providers is available on the Healthgrades insurance check. It is always a good idea to verify your insurance when making an appointment.

What conditions does Dr. John Wallmark, MD treat?

Dr. John Wallmark, MD frequently treats the following conditions: Anemia, Neutropenia, and Deep Vein Thrombosis (DVT). See more on Healthgrades.

What is Dr. John Wallmark, MD's office address?

Dr. Wallmark's office is located at 9905 Medical Center Dr Ste 200, Rockville, MD 20850. You can find other locations and directions on Healthgrades.

Is Dr. John Wallmark, MD able to provide telehealth services?

Dr. John Wallmark, MD provides telehealth services. Please contact the office to determine whether you are eligible.

Is Dr. John Wallmark, MD affiliated with any hospitals?

Dr. John Wallmark, MD is affiliated with Adventist Healthcare Shady Grove Medical Center and Suburban Hospital.

How much experience does Dr. John Wallmark, MD have?

Dr. John Wallmark, MD has over 30 years of healthcare experience.

Does Dr. John Wallmark, MD receive good ratings from patients?

There is a star rating of 4.8/5 for Dr. John Wallmark, MD. Patients say that they trusted the provider's decisions and the provider explained conditions well. See all patient feedback on Healthgrades.

Focus on Bile Duct Cancer

Locations

Maryland Oncology - Rockville

Maryland Oncology - Rockville9905 Medical Center Dr Ste 200 Rockville, MD 20850
1

Maryland Oncology - Bethesda

Maryland Oncology - Bethesda6420 Rockledge Dr Ste 4200 Bethesda, MD 20817
2
  • Call
  • Fax
  • Hours
    • Mon: 8:30am - 5:00pm
    • Tue: 8:30am - 5:00pm
    • Wed: 8:30am - 5:00pm
    • Thu: 8:30am - 5:00pm
    • Fri: 8:30am - 5:00pm
    • Sat: closed
    • Sun: closed
  • Directions

Affiliated Hospitals

Dr. Wallmark is affiliated with the following hospitals. Select a hospital below to learn more.

Learn more about how Healthgrades measuresHospital Quality.

Suburban Hospital

Bethesda, MD

79% Patients that would definitely recommend, 9% higher than the national average

12 Awards Received

Award Highlight: Patient Safety Excellence Award™ (2022)

Adventist Healthcare Shady Grove Medical Center

Rockville, MD

65% Patients that would definitely recommend, 5% lower than the national average

5 Awards Received