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Clinic Type

Cardiology

Address

22 Bramhall St, Portland, ME

Phone

207-662-2414

Email

Opening Hours

Not published — contact the clinic to confirm hours.

Telehealth

Offers Telehealth

Services Offered

  • Cardiology
  • Cardiac Care
  • Heart Health

Team

  • Douglas Sawyer — Cardiologist
  • Edward T. Oleary — Cardiologist
  • Howard Sherman — Cardiologist
  • Eddy Karnabi — Cardiologist
  • Alan Jansujwicz — Cardiologist
  • Paul Vom — Cardiologist

Insurance & Payment

Languages Spoken

What Patients Say

Overall sentiment across review platforms: positive

  • Healthgrades: 4.0/5.0 (12 ratings)
  • WebMD: 4.5/5.0 (11 ratings)
  • WebMD: 3.5/5.0 (9 ratings)
  • Healthgrades: 4.4/5.0 (7 ratings)

Patients praise

  • clear and direct explanations of medical conditions
  • thorough diagnostic approach
  • professional and friendly demeanor
  • strong trust and confidence in clinical outcomes like stent procedures
  • highly recommended by long-term patients

Common complaints

  • occasional long wait times for appointments
  • some patients reported lack of bedside manner in past experiences

"I have been seeing Dr Dietz for a number of years now. In 2017, I had a heart attack, and Dr Dietz saved my life by implanting 2 stents... I feel validated and valued by not only Dr Dietz, but his wonderful nurse, Michelle, and all the staff in the office."

WebMD Patient Review

"Was very happy with Dr. Colnes. Professional but friendly. Told me exactly what the problem was and recommended top notch surgeon for my condition. Would recommend, and already have, to anyone looking for a good cardiologist"

Healthgrades Patient Review

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

Information sourced from the clinic's website as of July 11, 2026.

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