Dr. William Kasumi, MD

Internal Medicine  |  
Male  |  
Age 48
Insurances AcceptedSave
Dr. William Kasumi, MD
Dr. Kasumi is a graduate of Stanford University. He attended the Albert Einstein College of Medicine where he received his M.D. with distinction in Anatomy and Statistics. After completing an internship in Internal Medicine at Jacobi Medical Center, Dr. Kasumi was a resident at Rutgers University in New Jersey. Dr. Kasumi was born overseas in Tokyo, Japan, and came to the United States when he was young.

401 Hackensack Ave Ste 501

Hackensack, NJ 07601

Contact Information
Dr. William Kasumi, MD

Dr. William Kasumi, MD

Accepted insurance

  • Aetna
  • Blue Cross Blue Shield
  • Cigna
  • Guardian
  • Humana
  • Medicaid
  • UnitedHealthCare

*Please verify this information when scheduling an appointment.

Learn about Dr. Kasumi

Dr. Kasumi's Experience

Dr. Kasumi's experience matches your search based on the following criteria:
  • Based on total number of patients treated over the last 12 months
  • Specializes in Internal Medicine
  • Board certified in Internal Medicine
  • No malpractice claims found
  • No sanctions found
  • No board actions found


  • Internal Medicine

Board Certifications

  • Internal Medicine
    Accredited by: American Board of Internal Medicine*

Conditions Treated

  • Anemia
  • Arthritis
  • Asthma
  • Autoimmune Diseases
  • Benign Tumor
  • COPD (Chronic Obstructive Pulmonary Disease)
  • Cancer
  • Congestive Heart Failure
  • Diabetes
  • Heart Disease
  • High Cholesterol
  • Hyperlipidemia
  • Hypertension
  • Obesity
  • Osteoporosis
  • Pulmonary Disease
  • Syncope
  • Thrombosis
  • Vascular Disease


  • Cardioversion, Elective
  • Electrocardiogram (EKG)
  • Endoscopy (Esophagus, Stomach, Small Intestine)
  • Immunization
  • Pap Smear
  • Peripheral Artery Catheterization
  • Physical Examination
  • Urinalysis
  • Vaccination

Background Check

0 Malpractice Claims

No malpractice history found for New Jersey.

0 Sanctions

No sanctions history found for the years that Healthgrades collects data.

0 Board Actions

No board actions found for the years that Healthgrades collects data.


  • Albert Einstein College Of Medicine Of Yeshiva University
    Medical School | Graduated 1996
  • Albert Einstein College Med
    Residency Hospital | Completed 1999

Awards & Recognition

Awards & Honors
  • Healthgrades Honor Roll
Media & Publications

Dr. Kasumi has no media or publications listed.

Languages Spoken

  • English
  • Japanese

Memberships & Professional Affiliations

Dr. Kasumi does not have any memberships or affiliations listed. If you are Dr. Kasumi and would like to add memberships or affiliations, please update your profile.

Dr. Kasumi's Reviews

Likelihood of recommending Dr. Kasumi to family and friends
based on 7 total reviews (4 with comments)
Dr. Kasumi's Performance
  • Trustworthiness
  • Explains condition(s) well
  • Answers Questions
  • Time well spent
Office & Staff Performance
  • Scheduling
  • Office environment
  • Staff friendliness
  • Average wait time
    31 to 45 minutes
Patient Comments (4)
in Bergenfield, NJ |
Dr. William T. Kasumi is a wonderful doctor. He listens patient words well and gives a good advice!
nj |
I went to Dr. kasumi's clinic and I think he and his clinic were excellent. The front desk and nurses were all courteous and doctor was well informed. He gave me medicines for my illness and the problem resolved in 2 days. I wholeheartedly recommend Dr. Kasumi.
in Ft Lee, NJ |
Dr Kasumi was just wonderful. He was warm, attentive and caring. Spent lots of time with me. I did not feel rushed. The other doctors on the case were also great. He was very knowledgeable. I felt that I was in the hands of a very capable and experienced doctor. I have bad diabetes and had Diabetic Ketoacidosis, a life-threatening condition when I came to the hospital, but he and his team made me better. I am forever indebted to Dr. Kasumi and others at Hackensack University Hospital.
in Hackensack, NJ |
Dr Kasumi treated my father in Hackensack hospital. He was not effective bordering on incompetent. His treatment was ineffective and my father is now in a much worse condition as compared to when he was admitted. Dr Kasumi seems to be only interested in discharging the patient regardless of the condition. It took a cardiologists and nephrologist to stop him from discharging my father with major renal and hear issues unresolved. The man is a menace - stay away from him.
I am passionate about caring for my patients and take tremendous pride in the services I, together with the hospital staff, perform. While it is very unfortunate that someone may express frustration with the care provided to a loved one, the physician-patient privilege legally prevent me from submitting a detailed response. Though such a response, if permitted, would reveal that the complaint is neither factually accurate nor fair. I invite you to contact me directly if you have any questions
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Now Accepting New Patients
This provider offers the following appointment availability:
Next Day
Dr. Kasumi accepts 7 insurance carriers
  • Aetna
  • Blue Cross Blue Shield
    Blue Cross Blue Shield PPO
  • Cigna
  • Guardian
  • Humana
  • Medicaid
  • UnitedHealthCare
    United Healthcare

*Please verify this information when scheduling an appointment.

Hospitals where Dr. Kasumi has admitting privileges

Hackensack University Medical Center
30 Prospect Ave
Hackensack, NJ 07601
View Hospital Profile