Dr. Karl E. Terwilliger
- Gender: Male
- Experience: 29 years
- Graduated from: R Franklin University Of Med & Sci/chicago Medical School
- Graduation year: 1992
- Sole propriator: No
- NPI: 1669426060
Dr. Karl E. Terwilliger MD
Anesthesiologist
He is located at 1825 Logan Avenue in Waterloo, IA 50703. Can help patients with the following: Acute Pain, Bladder Control, Diarrhea, Headache, Hyperlipidemia, Sedation. His National Provider Identifier (NPI) number is 1669426060. Appointment can be made via the phone number (319) 235-3886. He is affiliated with 1 practices and 1 hospitals.
Conditions treated
Dr. Karl Elliott Terwilliger, being an anesthesiologist, treats the following conditions. Please be advised that this list may not be complete. For the full list of conditions treated, consult directly with Dr. Karl E. Terwilliger.
- Abdominal Pain
- Acute Pain
- Anemia
- Arthritis
- Asthma
- Atherosclerosis
- Bladder Control
- Chest Pain
- Cholecystitis
- Chronic Obstructive Pulmonary Disease (COPD)
- Common Cold
- Constipation
- Cystitis
- Diarrhea
- Edema
- Fever
- Gastroesophageal Reflux Disease (GERD)
- General Anesthesia
- General Care
- Headache
- Heart Disease
- Hiatal Hernia
- High Blood Pressure
- Hot Flashes
- Hyperlipidemia
- Hyponatremia
- Influenza
- Inguinal Hernia
- Migraine
- Nausea and Vomiting
- Obesity
- Osteoporosis
- Pain Medication Management
- Peptic Ulcer
- Prescription Refill
- Regional Anesthesia
- Sedation
- Urethritis
- Urinary Tract Infection (UTI)
- Wrist Surgery
Procedures Performed by Dr. Karl E. Terwilliger
ACA Marketplace (Obamacare/HealthCare.gov) plan networks
Insurers selling ACA Marketplace (HealthCare.gov) plans list Dr. Karl E. Terwilliger as in-network for the following 2026 plans.
Health plans
Medica
Network data as of Mar 2, 2026, as reported by the insurer.
Show all 18 plans from Medica
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Inspire by Medica Bronze $0 Copay PCP Visits | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Inspire by Medica Bronze Share | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Inspire by Medica Expanded Bronze Standard | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Inspire by Medica Gold $0 Copay PCP Visits | EPO · Gold | Preferred | Accepting new patients |
| Inspire by Medica Gold Share | EPO · Gold | Preferred | Accepting new patients |
| Inspire by Medica Gold Standard | EPO · Gold | Preferred | Accepting new patients |
| Inspire by Medica Silver $0 Copay PCP Visits | EPO · Silver | Preferred | Accepting new patients |
| Inspire by Medica Silver Share | EPO · Silver | Preferred | Accepting new patients |
| Inspire by Medica Silver Standard | EPO · Silver | Preferred | Accepting new patients |
| Medica Insure Bronze $0 Copay PCP Visits | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Medica Insure Bronze Share | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Medica Insure Expanded Bronze Standard | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Medica Insure Gold $0 Copay PCP Visits | EPO · Gold | Preferred | Accepting new patients |
| Medica Insure Gold Share | EPO · Gold | Preferred | Accepting new patients |
| Medica Insure Gold Standard | EPO · Gold | Preferred | Accepting new patients |
| Medica Insure Silver $0 Copay PCP Visits | EPO · Silver | Preferred | Accepting new patients |
| Medica Insure Silver Share | EPO · Silver | Preferred | Accepting new patients |
| Medica Insure Silver Standard | EPO · Silver | Preferred | Accepting new patients |
Wellmark Health Plan of Iowa, Inc.
Network data as of Sep 8, 2026, as reported by the insurer.
Show all 10 plans from Wellmark Health Plan of Iowa, Inc.
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Wellmark Bronze HDHP HMO HSA Qualified | HMO · Expanded Bronze | Wellmark Blue HMO Network | Not accepting new patients |
| Wellmark Bronze Standard | UnityPoint Health | HMO · Expanded Bronze | Wellmark Blue HMO Unitypoint Health Network | Not accepting new patients |
| Wellmark Bronze Traditional HMO | HMO · Expanded Bronze | Wellmark Blue HMO Network | Not accepting new patients |
| Wellmark Gold Primary Care | UnityPoint Health | HMO · Gold | Wellmark Blue HMO Unitypoint Health Network | Not accepting new patients |
| Wellmark Gold Traditional HMO | HMO · Gold | Wellmark Blue HMO Network | Not accepting new patients |
| Wellmark Silver Primary Care | UnityPoint Health | HMO · Silver | Wellmark Blue HMO Unitypoint Health Network | Not accepting new patients |
| Wellmark Silver Traditional HMO | HMO · Silver | Wellmark Blue HMO Network | Not accepting new patients |
| Wellmark Standard Bronze HMO | HMO · Expanded Bronze | Wellmark Blue HMO Network | Not accepting new patients |
| Wellmark Standard Gold HMO | HMO · Gold | Wellmark Blue HMO Network | Not accepting new patients |
| Wellmark Standard Silver HMO | HMO · Silver | Wellmark Blue HMO Network | Not accepting new patients |
This covers ACA Marketplace plans only, as reported by each insurer. It does not include employer, Medicare Advantage, or state-run exchange plans, and a plan missing from this list does not mean Dr. Karl E. Terwilliger is out of network. Insurer directories can be out of date, so always confirm with the insurer and the office before your visit.
Medicare Enrollment
Dr. Karl E. Terwilliger is enrolled to bill Medicare as a Practitioner - Anesthesiology (also registered under: Practitioner - Critical Care (intensivists)) .
Bills through: Iowa Physicians Clinic Medical Foundation
Based on Medicare's public enrollment records as of Jul 17, 2026. This reflects Medicare fee-for-service enrollment only and says nothing about other insurance, quality, outcomes, or board certification.
Payments received
Drug payment
| KCI USA | $82 |
Other
| Food and Beverage | $83 |
Studies
R FRANKLIN UNIVERSITY OF MED & SCI/CHICAGO MEDICAL SCHOOL
Graduated in 1992Additional Specialities
- Internist
Looking for more Anesthesiologists?
There are 9 other anesthesiologists in this region.
- Gender: Female
- Address: 1825 Logan Avenue Waterloo, 50703, IA
- Gender: Male
- Address: 1825 Logan Avenue Waterloo, 50703, IA
- Gender: Male
- Address: 1825 Logan Avenue Waterloo, 50703, IA
- Gender: Male
- Address: 1825 Logan Avenue Waterloo, 50703, IA
- Gender: Male
- Address: 1825 Logan Avenue Waterloo, 50703, IA
- Gender: Male
- Address: 200 Medical Park Blvd. . 200 Medical Park Boulevard Petersburg, 23805, VA
- Gender: Male
- Address: 1825 Logan Avenue Waterloo, 50703, IA
- Gender: Male
- Address: 1825 Logan Avenue Waterloo, 50703, IA
- Gender: Male
- Address: 1825 Logan Avenue Waterloo, 50703, IA
Questions & Answers
Does Dr. Karl Elliott Terwilliger accept patients with Medica?
Yes, Dr. Karl Elliott Terwilliger is listed in-network for Medica through the ACA Marketplace (Obamacare/HealthCare.gov). See the Marketplace plans section for details.
Where can you meet with Dr. Karl Elliott Terwilliger?
Dr. Karl Elliott Terwilliger's office is located at 1825 Logan Avenue in Waterloo, IA 50703.
Does Dr. Karl Elliott Terwilliger have affiliation with practices?
Dr. Karl Elliott Terwilliger is affiliated with Cedar Valley Medical Specialists.
What conditions does Dr. Karl Elliott Terwilliger treat?
Dr. Karl Elliott Terwilliger provides treatment for Acute Pain, Bladder Control, Diarrhea, Headache, Hyperlipidemia, Sedation. For the full list see this list.
Has Dr. Karl Elliott Terwilliger affiliation with hospitals?
Dr. Karl Elliott Terwilliger is affiliated with ALLEN HOSPITAL.