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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. Leonard Grayson:

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Specialties & Research

Dr. Leonard Grayson, MD is board certified in Allergy & Immunology and Dermatology.

  • He has special expertise in 8 areas:
  • Acne (Acne Vulgaris)
  • Acne Rosacea
  • Asthma
  • Hay Fever (Seasonal Allergic Rhinitis)
  • Melanoma
  • Nasal Allergy (Rhinitis)
  • Psoriasis
  • Skin Cancer

Education & Awards

Dr. Grayson graduated from Rosalind Franklin University, North Chicago.


Dr. Grayson has 1 hospital affiliations:

  • Blessing Hospital at 11th St 

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Additional Information
Dr. Leonard David Grayson MD is a male Allergist & Immunologist and practices in Allergy & Immunology and Dermatology.
Where does Dr. Leonard D. Grayson practice?
Dr. Leonard Grayson has 1 office location.
Dr. Leonard Grayson practices Allergy & Immunology and Dermatology near Quincy, IL.
See Quincy Allergists and Quincy Dermatologists.