Mark Klein: Email & Phone Number

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Co-Founder at ColoWatch|Washington, District of Columbia, United States

Position:

Co-Founder at ColoWatch

Location:

Washington, District of Columbia, United States

View Mark Klein's Email

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Last updated: 2026-06-21

Updated: 2026-06-21

Found email addresses for Mark Klein:

Business emails:

m*****n@washingtonradiology.com,

m****n@wrapc.com,

m****n@colowatch.com

Personal emails:

m******a@gmail.com,

m**********d@gmail.com,

k***k@gwu.edu

Found phones for Mark Klein:

+1-323-***-**14,

+1-520-***-**54

A different Mark Klein?

Work Experience 43 years

Co-Founder at ColoWatch

May 2024 - Current

Co Director Virtual Colonoscopy American College of Radiology at American College of Radiology

Jan 2016 - Current

Adjunct Assistant Professor of Radiology at The George Washington University School of Medicine and Health Sciences

Jul 1983 - Current

Radiologist and Physician Administrator at Washington Radiology

Jan 1985 - Oct 2022

Mark Klein started working in 1983, then the employee has changed 3 companies and 3 jobs. On average, Mark Klein works for one company for 23 years 4 months.

Their professional focus is Board Certified, Healthcare, and Hospitals across 3 core areas.

Education

Master of Business Administration - MBA at The George Washington University

Doctor of Medicine - MD at State University of New York Downstate Health Sciences University

Bachelor of Science - BS - Cum Laude at Union College

Frequently Asked Questions

What is Mark Klein's email address?

SignalHire found verified email addresses for Mark Klein, both business and personal. Their business email is m*****n@washingtonradiology.com, and personal emails include m******a@gmail.com, m**********d@gmail.com, and k***k@gwu.edu.

What is Mark Klein's phone number?

SignalHire found multiple verified phone numbers for Mark Klein: +1-323-***-**14, and +1-520-***-**54.

How do I contact Mark Klein at ColoWatch?

You can reach Mark Klein through SignalHire by unlocking their verified email and direct phone number (free signup, no credit card needed). SignalHire is the fastest route if you need their contact details immediately.

What is Mark Klein's professional background?

Mark Klein has 43 years of professional experience. They have held roles including Co Director Virtual Colonoscopy American College of Radiology, Adjunct Assistant Professor of Radiology, and Radiologist and Physician Administrator at companies such as American College of Radiology, The George Washington University School of Medicine and Health Sciences, and Washington Radiology. Their education includes Master of Business Administration - MBA from The George Washington University, and Doctor of Medicine - MD from State University of New York Downstate Health Sciences University .

Is Mark Klein's contact information up to date?

Yes. Mark Klein's SignalHire profile was last updated on 21 June 2026, reflecting their current position as Co-Founder at ColoWatch.

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Mark Klein

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Mark Klein

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