Dennis M. Moss, DO Specialties Primary CareFamily Medicine Make an Appointment Independent Cliniciani Accepting New Patients View Location LocationPhone Dennis M. Moss, DO 9655 Longswamp Road Mertztown, PA 19539-8800 United States Get Directions in Google Maps to 9655 Longswamp Road, Mertztown 19539-8800 Get Directions in Google Maps (Map) 610-682-4944 Dennis M. Moss, DO 9655 Longswamp Road Mertztown, PA 19539-8800 United States Get Directions in Google Maps to 9655 Longswamp Road, Mertztown 19539-8800 Get Directions in Google Maps (Map) 610-682-4944