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Active NPI 1669426060 Individual Practitioner Male Practitioner

Dr. Karl Elliott Terwilliger , MD

Anesthesiology • Waterloo, IA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Karl Terwilliger, MD is a certified Anesthesiology practicing in Waterloo, IA. With approximately 34 years of clinical experience since graduating from R Franklin University Of Med & Sci/Chicago Medical School in 1992, Dr. Terwilliger delivers high-quality medical care to the local community at 1825 LOGAN AVE.

Dr. Terwilliger is affiliated with Iowa Physicians Clinic Medical Foundation and accepts Medicare assignment.

Frequently performed procedures and clinical services include insertion of artery tube for blood sampling or infusion through skin, insertion of non-tunneled central venous tube for infusion (5 years or older), insertion of probe in esophagus for heart ultrasound. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

1825 Logan Ave

Waterloo, IA 507031916

Telephone 3192353886
Fax 3192331630
Associated Practice Facility / Clinic

Medicare Profile & Education

Medical School

R Franklin University Of Med & Sci/chicago Medical School

Graduation Year

1992

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Anesthesiology in Waterloo, IA

Senior Veteran Specialist (>20 Yrs)
Practitioner Clinical Experience
34 Yrs +7.9 yrs vs City Avg
City Avg: 26.1 Yrs
State Avg: 24.9 Yrs
Regional Practice Density
29 Specialists

Practicing in Waterloo, IA (587 Statewide)

Telehealth Adoption Rate
3.4% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
79.6% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Terwilliger (34 Years) 34 Yrs
Waterloo Specialty Average (26.1 Years) 26.1 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)
Reporting Year:
HCPCS Code & Description Services Patients Submitted Charge Medicare Allowed
36620 Insertion of artery tube for blood sampling or infusion through skin
48 46 $136.96 $40.30
36556 Insertion of non-tunneled central venous tube for infusion (5 years or older)
32 31 $627.31 $75.86
93313 Insertion of probe in esophagus for heart ultrasound
22 22 $124.00 $10.28
00567 Anesthesia for heart artery bypass grafting on heart-lung machine
18 18 $3521.44 $758.16
76942 Ultrasonic guidance imaging supervision and interpretation for insertion of needle
12 12 $72.25 $27.96

Medical Specialties & State Licenses

Anesthesiology Primary Specialty

NUCC Taxonomy Code: 207L00000X

State License IA 34416

An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID
0250993 (IA)
Commercial Insurance / Payer ID Wellmark Ins
43625 (IA)
Commercial Insurance / Payer ID John Deere Health Ins
421417307F6 (IA)

Hospital & Practice Group Affiliations

Iowa Physicians Clinic Medical Foundation

4480 Utica Ridge Rd, Bettendorf, IA 527221644

Iowa Physicians Clinic Medical Foundation

4480 Utica Ridge Rd, Bettendorf, IA 527221637

Phone: 5637425950

Iowa Physicians Clinic Medical Foundation

1825 Logan Ave, Waterloo, IA 507031916

Phone: 3192353886

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

22 Associated Practitioners
NPI 1013960186

Doctor of Medicine (M.D.)

Dr. James Connell , MD

Radiology - Diagnostic Radiology

NPI 1083656995

Doctor of Medicine (M.D.)

Dr. Dan Mulholland , MD

Radiology - Diagnostic Radiology

NPI 1104805076

Doctor of Medicine (M.D.)

NPI 1215982954

Doctor of Medicine (M.D.)

Sarah Gauthier , RN, CNOR, RNFA

Registered Nurse - Registered Nurse First Assistant

NPI 1225926728

Registered Nurse, CNOR, RNFA

Cheryl Wallace

Registered Nurse

NPI 1275422107

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

6 Historical Events
NPI Profile Active September 12, 2007

NPI status registered as active in NPPES database

📍
Updated Practice Location September 12, 2007

Registered at 1825 LOGAN AVE, WATERLOO, IA 507031916 (Tel: 3192353886)

📍
Updated Business Mailing Address September 12, 2007

Registered at PO BOX 2758, WATERLOO, IA 507042758 (Tel: 3192355390)

👤
Provider Name / Credentials Updated September 12, 2007

Recorded as KARL TERWILLIGER, MD

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) September 12, 2007

Anesthesiology (License #34416 in IA)

🟢
Initial NPI Registration & Enumeration May 20, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1669426060
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: May 20, 2006
Last Update: September 12, 2007
Sole Proprietor: No

Mailing Address

Po Box 2758

Waterloo, IA 507042758

Phone: 3192355390

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).
⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.