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

Karl Elliott Terwilliger, MD

Individual provider Anesthesiology Physician · NPI 1669426060

Karl Elliott Terwilliger, MD is an Anesthesiology in Waterloo, Iowa. Graduated from R Franklin University of Med & SCI/Chicago Medical School in 1992, 34 years ago. Practices with Iowa Physicians Clinic Medical Foundation, a 1,242-clinician group and accepts Medicare assignment. Licensed in Iowa.

Years since qualifying
34
Trained at
R Franklin University of Med & SCI/Chicago Medical School
Licensed in
IA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1825 Logan Ave
Waterloo, IA 50703-1916
Phone: (319) 235-3886
Fax: (319) 233-1630
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence 34416 (IA)

Record details

NPI number1669426060
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 20, 2006
Last updated in NPPESSeptember 12, 2007

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Also practisesCRITICAL CARE (INTENSIVISTS)
Medical schoolR FRANKLIN UNIVERSITY OF MED & SCI/CHICAGO MEDICAL SCHOOL
Graduated 1992 (34 years in practice)
Group practice Iowa Physicians Clinic Medical Foundation — 1242 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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