Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Demetrios Spyridon Theodoropoulos, MD

Individual provider Clinical & Laboratory Immunology (Allergy & Immunology) Physician · NPI 1326299488

Dr. Demetrios Spyridon Theodoropoulos, MD is an Allergy/Immunology in Onalaska, Wisconsin. Qualified in 1987, 39 years ago. Practices with Allergy Associates Holdings, Ltd, a 5-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Wisconsin.

Years since qualifying
39
Licensed in
WI
In the registry since
2008
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

2727 Midwest Dr
Onalaska, WI 54650
Phone: (608) 782-2027
Fax: (608) 782-6172
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical & Laboratory Immunology (Allergy & Immunology) Physician (primary) Taxonomy 207KI0005X · Licence 44060-20 (WI)

Record details

NPI number1326299488
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 8, 2008
Last updated in NPPESDecember 14, 2015

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyALLERGY/IMMUNOLOGY
Medical schoolOTHER
Graduated 1987 (39 years in practice)
Group practice Allergy Associates Holdings, Ltd — 5 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services