Dr. John R. Clark
- Gender: Male
- Experience: 42 years
- Graduated from: Washington University School Of Medicine
- Graduation year: 1979
- Sole propriator: No
- NPI: 1871550244
Dr. John R. Clark MD
Oncologist
He is located at 55 Fruit Street Yaw 7B Mass General Hospital in Boston, MA 02114. Can help patients with the following: Bladder Control, Gastroesophageal Reflux Disease (GERD), Neutropenia, Thymoma, Urethral Cancer, Urethritis. His National Provider Identifier (NPI) number is 1871550244. Appointment can be made via the phone number (617) 724-4000. He is affiliated with 4 hospitals.
Conditions treated
Dr. John Ross Clark, being an oncologist, treats the following conditions. Please be advised that this list may not be complete. For the full list of conditions treated, consult directly with Dr. John R. Clark.
- Abdominal Pain
- Acute Pain
- Anal Cancer
- Anemia
- Arthritis
- Asthma
- Atherosclerosis
- Basal Cell Carcinoma
- Beta Thalassemia
- Bile Duct Cancer
- Bladder Cancer
- Bladder Control
- Bone Cancer
- Brain Cancer
- Breast Cancer
- Cancer
- Carcinoid Tumor
- Carcinoma
- Cervical Cancer
- Chest Pain
- Cholecystitis
- Chronic Obstructive Pulmonary Disease (COPD)
- Colon Cancer
- Common Cold
- Constipation
- Cystitis
- Deep Vein Thrombosis (DVT)
- Diarrhea
- Edema
- Esophageal Cancer
- Fever
- Gallbladder Cancer
- Gastroesophageal Reflux Disease (GERD)
- General Care
- Glioma
- Head and Neck Cancer
- Headache
- Heart Disease
- Hemophilia
- Hiatal Hernia
- High Blood Pressure
- Hodgkin's Disease
- Hot Flashes
- Hyperlipidemia
- Hyponatremia
- Idiopathic Thrombocytopenic Purpura (ITP)
- Influenza
- Inguinal Hernia
- Kidney Cancer
- Larynx Cancer
- Leukemia
- Liver Cancer
- Lung Cancer
- Melanoma
- Mesothelioma
- Migraine
- Multiple Myeloma
- Nasopharyngeal Cancer
- Nausea and Vomiting
- Neoplasm
- Neuroblastoma
- Neutropenia
- Non-Hodgkin's Lymphoma (NHL)
- Obesity
- Oral Cancer
- Osteoporosis
- Ovarian Cancer
- Pancreatic Cancer
- Penis Cancer
- Peptic Ulcer
- Pernicious Anemia
- Pheochromocytoma (PCC)
- Polycythemia
- Prescription Refill
- Prostate Cancer
- Pulmonary Embolism (PE)
- Retinoblastoma
- Salivary Gland Cancer
- Sarcoma
- Sickle Cell Anemia
- Skin Cancer
- Stomach Cancer
- Testicular Cancer
- Thalassemia
- Thrombocytopenia
- Thymoma
- Thyroid Cancer
- Urethral Cancer
- Urethritis
- Urinary Tract Infection (UTI)
- Uterine Cancer
- Vaginal Cancer
Procedures Performed by Dr. John R. Clark
Insurances Accepted by Dr. John R. Clark
- Medicare
Medicare Enrollment
Dr. John R. Clark is enrolled to bill Medicare as a Practitioner - Medical Oncology (also registered under: Practitioner - Internal Medicine) .
Bills through: Massachusetts General Physicians Organization Inc
Based on Medicare's public enrollment records as of Jul 17, 2026. This reflects Medicare fee-for-service enrollment only and is not a comment on insurance accepted, quality, outcomes, or board certification.
Payments received
Drug payment
| Merck | $44900 |
| Boehringer Ingelheim | $30900 |
Other
| Consulting | $75800 |
Studies
WASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated in 1979Additional Specialities
- Hematology and Oncology Specialist
- Internist
Affiliated hospitals
Looking for more Oncologists?
Out of the 79 oncologists in this region, here are 10 randomly selected ones for you to explore.
- Gender: Female
- Address: 55 Fruit Street Boston, 2114, MA
- Gender: Male
- Address: 100 Blossom Street Boston, 2114, MA
- Gender: Male
- Address: 55 Fruit Street Boston, 2114, MA
- Gender: Male
- Address: 55 Fruit Street Boston, 2114, MA
- Gender: Female
- Address: M01 10 101 Merrimac Street Boston, 2114, MA
- Gender: Female
- Address: 55 Fruit Street Boston, 2114, MA
- Gender: Female
- Address: Gillette Center for WOMEN'S Cancer 55 Fruit Street Boston, 2114, MA
- Gender: Male
- Address: 55 Fruit Street Boston, 2114, MA
- Gender: Male
- Address: 185 Cambridge Street Boston, 2114, MA
Questions & Answers
What conditions does Dr. John Ross Clark treat?
Dr. John Ross Clark provides treatment for Bladder Control, Gastroesophageal Reflux Disease (GERD), Neutropenia, Thymoma, Urethral Cancer, Urethritis. For the full list see this list.
Has Dr. John Ross Clark affiliation with hospitals?
Dr. John Ross Clark is affiliated with MASSACHUSETTS GENERAL HOSPITAL. For the full list of hospitals see this list.
Does Dr. John Ross Clark accept patients with Medicare?
Yes, Dr. John Ross Clark accepts patients with Medicare.
Where can you meet with Dr. John Ross Clark?
Dr. John Ross Clark's office is located at 55 Fruit Street Yaw 7B Mass General Hospital in Boston, MA 02114.