BEGIN:VCARD VERSION:3.0 FN:Don Singer\, MD N:Singer;Don;;;MD TITLE:Clinical Pathology/Laboratory Medicine Physician TEL;TYPE=WORK,VOICE:+16082510240 URL:https://www.gale.care/providers/wi/madison/don-singer-md-1992828073 NOTE:NPI 1992828073. From the NPPES registry (CMS)\, file of 2026-06-08. No t affiliated with Gale. X-NPI:1992828073 END:VCARD