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License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Learn more about Dr. Gregory Maclennan:

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Specialties & Research

Dr. Gregory Maclennan, MD is board certified in Anatomic Pathology, Cytopathology, and Urology.

  • He has special expertise in 1 area:
  • Overactive Urinary Bladder

Education & Awards

Dr. Maclennan graduated from University Of Manitoba Faculty Of Medicine, Winnipeg.


Dr. Maclennan has 5 hospital affiliations:

  • University Hospitals Geauga Medical Center 
  • UH Conneaut Medical Center 

> > > > Dr. Gregory Maclennan, MD

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Additional Information
Dr. Gregory Maclennan MD is a male Pathologist, has 41 years of experience and practices in Urology, Anatomic Pathology, and Cytopathology.
Where does Dr. Gregory Maclennan practice?
Dr. Gregory Maclennan has 1 office location.
Dr. Gregory Maclennan practices Urology, Anatomic Pathology, and Cytopathology near Cleveland, OH.
See Cleveland Urologists and Cleveland Pathologists.