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- 1825 Logan Ave, Waterloo, IA 50703
About Dr. Terwilliger
Karl E. Terwilliger, MD is a healthcare provider in Waterloo, IA specializing in anesthesiology. Karl trained at R Franklin University of Med & Sci/Chicago Medical School, graduating in 1992. According to Medicare claims data, Karl cared for 129 Medicare patients across 132 services. The services billed most often 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), and insertion of probe in esophagus for heart ultrasound. This provider record is associated with NPI 1669426060.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (319) 235-3886
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
1825 LOGAN AVE
Waterloo, IA 50703
Conditions Commonly Evaluated or Treated
Within Anesthesiology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Sedation & Phobias
Anesthesia complications
Back & spine
- Arthritis of the spine
- Degenerative disc disease
- Failed back surgery syndrome
- Herniated disc
- Lower back pain
- Neck pain
- Sacroiliac joint pain
- Spinal compression fracture
- Spinal stenosis
- Spondylolisthesis
- Tailbone pain
- Upper Back Pain
Chronic pain
Facial & jaw pain
General pain
Head & facial pain
Headaches
Joint pain
Mental health
Muscle pain
Musculoskeletal pain
Nerve pain
- Abdominal wall nerve pain
- Complex Regional Pain Syndrome
- Foot Numbness and Tingling
- Groin nerve pain after hernia surgery
- Nerve damage after surgery
- Neuropathy
- Outer thigh burning and numbness
- Phantom limb pain
- Pinched nerve
- Piriformis syndrome
- Sciatica
- Shingles pain
- Tarsal Tunnel Syndrome
Pelvic pain
Post-surgery recovery
Sedation & anesthesia
Spine pain
Procedures & services
Nerve blocks
- Celiac Plexus Nerve Block
- Abdominal Nerve Block
- Ganglion impar block
- Groin nerve block
- Pudendal nerve block
- Superior hypogastric plexus block
Nerve Blocks
Pain Relief Procedures
Regional anesthesia
Sedation
- In-Office Anesthesia for Plastic Surgery
- Pediatric Dental Sedation
- Sedation for Colonoscopy and Endoscopy
- Sedation for Egg Retrieval
- Sedation for MRI
- Sedation for Vasectomy
- IV sedation for endoscopy
Sedation & anesthesia
- General anesthesia
- Moderate dental sedation
- Sedation for dental work
- Labor epidural
- Pre-surgery anesthesia consult
- Spinal spinal block
Specialized Care
Vascular Access
Ablation
Head & facial procedures
Implants & devices
- Pain pump implant
- Pain pump refill and check
- Peripheral nerve stimulator implant
- Spinal cord stimulator implant
- Spinal cord stimulator trial
Infusion therapies
Infusion therapy
Joint injections
Muscle injections
Nerve injections
- Celiac plexus block
- Lumbar sympathetic block
- Nerve block
- Rib nerve block
- Shoulder nerve block
- Stellate ganglion block
Nerve procedures
- Knee nerve block and ablation
- Peripheral nerve hydrodissection
- Radiofrequency ablation
Pain relief procedures
Spine injections
- Epidural steroid injection
- Facet joint injection
- Medial branch block
- Sacroiliac joint injection
- Tailbone epidural injection
Spine procedures
Procedures Most Often Billed to Medicare
132 services · 129 patients · 5 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Insertion of artery tube for blood sampling or infusion through skin | Procedure | 36620 |
48 | More often than most peers in Anesthesiology |
| Insertion of non-tunneled central venous tube for infusion (5 years or older) | Procedure | 36556 |
32 | More often than most peers in Anesthesiology |
| Anesthesia for heart artery bypass grafting on heart-lung machine | Anaesthesia | 00567 |
18 | More often than most peers in Anesthesiology |
| Ultrasonic guidance for needle placement | Imaging | 76942 |
12 | Less often than most peers in Anesthesiology |
| Insertion of probe in esophagus for heart ultrasound | Treatment | 93313 |
22 | More often than most peers in Anesthesiology |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other anesthesiologists at this location 5
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 2
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 28 related providers in 4 groups
Other anesthesiologists in Waterloo 4
Same specialty, same city.
Trained at R Franklin University of Med & Sci/Chicago Medical School 8
Other providers in the same specialty who trained at the same institution.
Class of 1992 at R Franklin University of Med & Sci/Chicago Medical School 8
Providers who graduated from the same medical school in the same year.
Also performs Insertion of artery tube for blood sampling or infusion through skin 8
Providers in IA who bill this service to Medicare most often.
Common questions
What does Dr. Terwilliger specialize in?
Dr. Terwilliger is an anesthesiologist in Waterloo, IA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Anesthesiology”.
NPI registry
Where is Dr. Terwilliger located?
Dr. Terwilliger is listed at 1825 Logan Ave, Waterloo, IA 50703. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Terwilliger's phone number?
The number on file is (319) 235-3886. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Terwilliger's NPI number?
Dr. Terwilliger's National Provider Identifier is 1669426060. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Terwilliger go to medical school?
Dr. Terwilliger attended R Franklin University of Med & Sci/Chicago Medical School, graduating in 1992. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Terwilliger been practicing?
Dr. Terwilliger has 34 years experience. Calculated from a graduation year of 1992, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Terwilliger do most often?
According to Medicare billing data, Dr. Terwilliger performs procedures including insertion of artery tube for blood sampling or infusion through skin and insertion of non-tunneled central venous tube for infusion; reads or performs imaging such as ultrasonic guidance for needle placement; provides treatments such as insertion of probe in esophagus for heart ultrasound and anesthesia for heart artery bypass grafting on heart-lung machine. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Terwilliger confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Terwilliger. If this is you, claiming it is free.
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