Karl Elliott Terwilliger, MD
Anesthesiology Physician · Waterloo, IA
Karl Elliott Terwilliger, MD is an anesthesiology physician with a practice address in Waterloo, Iowa, and NPI 1669426060, issued on May 20, 2006. Check the license (Iowa 34416, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Karl Elliott Terwilliger
- Credential
- MD
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- 34416 IA
Self-reported in NPPES; status is on the state search - Practice location
- 1825 Logan Ave, Waterloo, IA 50703
- Phone
- (319) 235-3886
- Enumerated
- May 20, 2006
- Record last updated
- Sep 12, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (319) 233-1630
- Medicaid ID
- 0250993 IA
- Medicare enrollment
- Enrolled (PECOS I20100218000842); accepts Medicare assignment
- Medical or professional school
- R Franklin University Of Med & Sci/Chicago Medical School, 1992
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 569 in Iowa → Look up another NPI →
Also registered at 1825 Logan Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Katie Baker, DOEmergency Medicine Physician1518387893
- Brandon Beauchamp, DOEmergency Medicine Physician1982637112
- Wayde Blumhardt, CRNACertified Registered Nurse Anesthetist1528011996
- Zubair Hassan Bodla, M.D.Hospitalist Physician1427710698
Verify Karl Elliott Terwilliger in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license 34416Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $13.44
1 payment: food and beverage; the largest payer was Becton, Dickinson and Company. The 17,774 providers of this specialty with any payment received $669.59 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Iowa Physicians Clinic Medical FoundationWaterloo, IA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karl Elliott Terwilliger among 569 anesthesiology physician records in Iowa
Karl Elliott Terwilliger, MD is one of 569 anesthesiology physician records with a practice address in Iowa. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 21% of them.
- NPI issued2006 · 21% of these records are older, 59% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1992 · median 2006 among the 361 with a school on file
- Record last updated2007 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
29 anesthesiology physician records list a practice address in Waterloo
They are 29 of the 1,512 NPPES records with a practice address in Waterloo, and 569 anesthesiology physician records in Iowa.
All 569 in Iowa → Every provider in Waterloo → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Keeran Ghandivel, MDWaterloo, IA 507031013960186
- Matthew Grady, M.D.Waterloo, IA 507031982813739
- Tahseen Husain, MDWaterloo, IA 507031215982954
- Rodrigo Otavio Lami Pereira, MDWaterloo, IA 507031306330782
- Paula McFadden, MDWaterloo, IA 507031942254099
- Vijayasimha Pothula, MDWaterloo, IA 507031083852248
- Joshua PriebeWaterloo, IA 507031275970352
- Steven Punke, M.D.Waterloo, IA 507031720129133
Common questions
What is Karl Elliott Terwilliger, MD's NPI number?
Karl Elliott Terwilliger, MD's National Provider Identifier (NPI) is 1669426060, issued on May 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Karl Elliott Terwilliger, MD located?
The NPPES record lists a practice address at 1825 Logan Ave, Waterloo, IA, 50703. Phone: (319) 235-3886. Providers update this record themselves, so call before visiting.
How can I verify Karl Elliott Terwilliger, MD's license?
NPPES lists Iowa license number 34416, as entered by the provider. Search the Iowa Board of Medicine at https://dial.iowa.gov/about-dial/boards-and-commissions/medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.