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Adult and Pediatric Allergy, Asthma, and Clinical Immunology


Suite 380      Gateway Towers      320 Ft. Duquesne Blvd.      Pittsburgh, PA  15222


At Point State Park

(412) 471-3818

Fax: (412) 471-3657


   Mayer Green, M.D., Founder                                                                                                                         Suburban Office:

   Richard L. Green, M.D.                                                                                                                                  One Alexander Center

   Andrew G. Vayonis, M.D.                                                                                                                               2585 Freeport Road

   Thomas L. Mertz, D.O., PharmD.                                                                                                                  Suite 210

                                                                                                                                                                           Pittsburgh, PA 15238

   Diplomats:                                                                                                                                                      Phone: (412) 828-3800

   American Board of Internal Medicine                                                                                                         Fax: (412) 828-8561

   American Board of Allergy and Clinical Immunology





  • Please arrive 15 to 30 minutes prior to scheduled visit.


  • Patients receiving allergy injections must wait in the office for a 20 to 30 minute observation period after every injection in case of an adverse reaction.


  • Have any paperwork completed prior to arrival, bring updated insurance information and a copay if you have one.


  • If you need to cancel or reschedule your appointment, please contact the office at least 24 hours prior to your appointment or you may be charged a deposit to reschedule. 


  • A parent or legal guardian must accompany children under age 18.  It is suggested that children of patients not attend the appointment due to the length of the appointment and COVID-19 precautions.


  • As a courtesy to other allergic patients, we ask that you refrain from wearing strong perfumes or colognes at the time of your visit.

  • Please wear a mask while here in the office. 

  • Please reschedule if you are ill.


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