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Dr. John B Hein, MD - Haverhill, MA - Allergy and Immunology logo

Dr. John B Hein, MD - Haverhill, MA - Allergy and Immunology

Allergy and ImmunologyNewburyport, MA

★★★★☆4.3/595 reviews across 4 platforms

Ratings by platform

  • Mass General Brigham: 4.8 out of 5 (44 reviews)
  • WebMD Care: 4.0 out of 5 (13 ratings)
  • Healthgrades: 3.3 out of 5 (13 reviews)
  • U.S. News & World Report: 4 out of 5 (25 reviews)

What patients say

Patients praise

  • High patient appreciation for diagnostic skills and accuracy
  • Recognition for being thorough and knowledgeable in complex or recurring cases
  • Appreciation for his ability to listen and explain medical conditions clearly

Common complaints

  • Inconsistent patient experiences, with some reports of poor bedside manner or communication issues
  • Variable ratings regarding time spent with patients and thoroughness of exams

In patients' words

"I felt Dr Hein was fully knowledgeable re my history and was respectful of my concerns. He was patient and thorough in scheduling follow-up care. He was the most personable of the doctors I have met so far at MGB."

Mass General Brigham Patient Review

"I spoke to Dr. Hein for 5 minutes and he was able to give a name to what I had. He’s the best allergist or any allergy like symptoms such as EIA which are still considered new and rare. I highly recommend him!"

WebMD Patient Review

"Dr. Hein quickly diagnosed, assessed, and treated my case (chronic hives). He has an efficient, friendly, and caring staff, who reflect Dr. Hein's own demeanor. His empathy and experience were important to me and much appreciated."

Healthgrades Patient Review

How these reviews were compiled

Synthesized from public patient-review platforms as of Jul 11, 2026 — sources: [1][2][3][4][5][6][7].

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