Dr. John Katzenberg, MD


Internal Medicine | Male

Dr. John Katzenberg, MD
Dr. John Katzenberg, MD is an internal medicine doctor who practices in Townsend, MA. He is 64 years old and has been practicing for 36 years. Dr. Katzenberg is affiliated with Nashoba Valley Medical Center.

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Dr. Katzenberg's Care Philosophy

I try to give patients the time they need to learn everything I can about them. In order to better decide on the right treatments and advice to give them.

Dr. Katzenberg's Experience

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Board Certifications

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Background Check

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Languages Spoken

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Memberships & Professional Affiliations

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Visiting Dr. Katzenberg

Dr. Katzenberg accepts 9 insurance carriers

Dr. Katzenberg is now accepting new patients

Affiliated Hospitals

Hospital Quality
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Dr. Katzenberg's Reviews

Likelihood of recommending Dr. Katzenberg to family and friends
based on 14 total reviews (5 with comments)
Dr. Katzenberg's Performance
  • Trustworthiness
  • Explains condition(s) well
  • Answers Questions
  • Time well spent
Office & Staff Performance
  • Scheduling
  • Office environment
  • Staff friendliness
  • Average wait time
    16 to 30 minutes
Patient Comments (5)
in Newton Upper Falls, MA |
I have been a patient of Dr. Katzenberg's for over 22 years. He is always patient and answers all my questions. He never hurries you during a visit, but takes the time to answer questions and discuss any concerns. He really cares.
in Townsend, MA |
Bullying behavior. I suppose that it is common these days, but he reads from a list insisting that you have what's on the list, ignoring any facts that were established by interview. After 4 years could not correctly name my medical problem. Expects you to spend days taking tests that are probably not necessary, but ignores your established medical problems. Present receptionist has a mission to be exceptionally rude, not returning phone calls, accusing me of lying without provocation.
Ashby, MA |
I was never able to actually see the doctor. I switched PCP after my doctor retired. I went to Dr. Katzenberg's office and filled out all of the appropriate paperwork. I was given an appointment four weeks out. I explained to the front office person that I was going to need refills for certain medications before the appt. She assured me that she would get me in before the appt. I called several times trying to get in or at least to have my prescriptions sent to the pharmacy. It never happened!
in Tyngsboro Massachusetts |
I have been a patient of Dr.Katzenberg since he opened his first practice many years ago. I have gotten excellent care and would highly recommend him. Dr. John takes his time and never rushes you and he takes more of a holistic approach rather than pushing medications that have many side-effects. If you call him he does call you back and when your sick and need to be seen right away his assistant always finds you a appointment. He is highly professional and a rare breed in our fast pace world.
in Boston, MA |
Thorough and knowledgeable, although some of his ideas are sometimes old school. Biggest negative is his receptionist, about the least helpful you could imagine, though annoyingly polite in a cold and perfunctory way. Don't believe I've ever seen her smile. Just my opinions, take them with a grain of salt.
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Dr. Katzenberg's Care Philosophy

I try to give patients the time they need to learn everything I can about them. In order to better decide on the right treatments and advice to give them.

Dr. Katzenberg'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 Emergency Medicine and Internal Medicine
  •  No malpractice claims found
  •  No sanctions found
  •  No board actions found

Awards & Recognition

  • Awards & Honors
    • Healthgrades Honor Roll
    What is a recognized doctor
  • Media & Publications

    Dr. Katzenberg has no media or publications listed.

Background Check

  • 0
    Malpractice Claims

    No malpractice history found for Massachusetts.

    What is medical malpractice
  • 0

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

    What is a sanction or disciplinary action
  • 0
    Board Actions

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

    What are board actions

Board Certifications

Why It Matters: Dr. Katzenberg's Board Certifications

Board certification should be one of your top considerations when choosing a doctor. Board certification is an official recognition given to doctors who have met specific requirements set by national medical specialty boards in the... More

  • Emergency Medicine
  • Internal Medicine

Conditions Treated

  • Addiction
  • Allergic Rhinitis
  • Asthma
  • Attention Deficit Disorder (ADD)
  • COPD (Chronic Obstructive Pulmonary Disease)
  • Depression
  • Diabetes
  • Enlarged Prostate (BPH)
  • Gastritis
  • High Cholesterol
  • Hypertension
  • Infections
  • Irritable Bowel Syndrome
  • Nicotine Addiction
  • Thyroid Disease
  • Tobacco Withdrawal


  • Medical School
    Boston University School Of Medicine

    Graduated in 1981

  • Internship Hospital
    St Elizabeth Mc Boston

    Completed in 1982

  • Residency Hospital
    St Elizabeth Hosp Of Boston

    Completed in 1984

  • Fellowship Hospital
    University Mass Med Center

    Completed in 1985

  • Undergraduate School
    Boston University School Of Medicine

    Graduated in 1977

Languages Spoken

  • English

Memberships &
Professional Affiliations

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


  • Internal Medicine
  • Emergency Medicine

Procedures Performed

  • Abscess Incision and Drainage
  • Earwax Removal
  • Flu Shot
  • Immunization
  • Mole Removal
  • Strep Test
  • Vaccination
  • Wart Removal