Are you John T. Fiedler, M.D.? This profile is yours to edit: update your address, phone, photo and services.
Edit this profileAt a glance
- 745 Fletcher Dr, Suite 101, Elgin, IL 60123
About Dr. Fiedler
Based in Elgin, IL, John T. Fiedler, M.D. is listed in the NPI registry under internal medicine. John graduated from Loyola University of Chicago, Stritch School of Medicine in 1993. According to Medicare claims data, John cared for 4,683 Medicare patients across 10,004 services. The services billed most often include injection, denosumab, 1 mg, insertion of needle into vein for collection of blood sample, and blood test, comprehensive group of blood chemicals. NPI 1487623716 identifies this record in the national registry.
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
- (847) 742-3525
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
745 FLETCHER DR SUITE 101
Elgin, IL 60123
Conditions Commonly Evaluated or Treated
Within Internal Medicine 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
Cancer Prevention
Cancer risk
Environmental health
- Asbestos Exposure
- Contaminated drinking water exposure
- Heat exhaustion and heat stroke
- Radon gas exposure
- Tick bite and Lyme disease risk
- Toxic Mold Exposure
- Wildfire smoke and air pollution exposure
- Workplace Chemical Exposure
General wellness
Heart health
Infectious Disease
Infectious disease
Kidney health
Lifestyle & wellness
Lifestyle health
Longevity
Metabolic & Lifestyle
Occupational health
Occupational Health
Rashes & allergy
Sexual Health
Sexual health
Substance use
Travel health
Wellness and energy
Workplace health
Most searched conditions
Cardiometabolic
Digestive and liver
Endocrine, blood, and bone
Kidney and urinary
Respiratory
Blood & Circulation
Blood disorders
Brain & Nerves
Brain and nerves
Cardiac and vascular
Digestive
Heart & Circulation
Infections
Kidney & Bladder
Lungs & Breathing
Mental Health
Neurologic and behavioral
Pain
Rheumatologic and pain
Procedures & services
Addiction & habits
Cancer screening
Cancer Screening
Checkups & exams
Chronic illness
Diagnostics & screening
Environmental health
Fitness & body composition
Heart & Circulation
Heart & circulation
Heart health
Hospital-based procedures
Imaging referral
Immunizations
Infection & Microbiology Tests
Lifestyle & Prevention
Longevity
Lower endoscopy
Lungs & Breathing
Metabolic & Weight
Metabolic health
Occupational health
Occupational Health
Office Procedures
Preventive and evaluation
- Preoperative medical clearance
- Medication management
- Post-hospital transitional care
Preventive imaging
Preventive screening
Routine Blood Tests
Screening & labs
Screening and diagnostic testing
- Blood pressure screening
- Cancer screening and prevention planning
- Diabetes and prediabetes screening
- EKG
- Spirometry
Screenings & Diagnostics
Travel Health
Travel medicine
Wellness
Wellness & Screening
Workplace health
Skin growths
Sleep
Most searched procedures
Bones & Joints
Brain and nerves
Digestive
Exams & Consultations
Lab tests
Minor procedures
Office procedures
Pain management
Preventive & Routine Care
Sexual health
Procedures Most Often Billed to Medicare
10,004 services · 4,683 patients · 25 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
817 | More than most peers in Internal Medicine |
| Influenza vaccine, inactivated | Treatment | 90653 |
91 | More often than most peers in Internal Medicine |
| Administration and interpretation of patient-focused health risk assessment | Treatment | 96160 |
64 | As often as other peers in Internal Medicine |
| Injection of drug or substance under skin or into muscle | Treatment | 96372 |
39 | As often as other peers in Internal Medicine |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | Treatment | 93000 |
35 | As often as other peers in Internal Medicine |
| Injection, denosumab, 1 mg | Drug given | J0897 |
3,360 | More often than most peers in Internal Medicine |
| Blood test, comprehensive group of blood chemicals | Lab test | 80053 |
648 | More often than most peers in Internal Medicine |
| Hemoglobin a1c level | Lab test | 83036 |
609 | More than most peers in Internal Medicine |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
488 | More often than most peers in Internal Medicine |
| Blood test, lipids (cholesterol and triglycerides) | Lab test | 80061 |
480 | More often than most peers in Internal Medicine |
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 internists at this location 5
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
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 — 31 related providers in 4 groups
Other internists in Elgin 7
Same specialty, same city.
Trained at Loyola University of Chicago, Stritch School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1993 at Loyola University of Chicago, Stritch School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Insertion of needle into vein for collection of blood sample 8
Providers in IL who bill this service to Medicare most often.
Common questions
What is John T. Fiedler's specialty?
John T. Fiedler is an internist in Elgin, IL. That is the designation recorded for this NPI in the federal registry, where it is listed as “Internal Medicine”.
NPI registry
Where can I find John T. Fiedler?
John T. Fiedler is listed at 745 Fletcher Dr Suite 101, Elgin, IL 60123. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact John T. Fiedler?
The number on file is (847) 742-3525. Contact the office directly to confirm availability and scheduling.
NPI registry
What is John T. Fiedler's NPI number?
John T. Fiedler's National Provider Identifier is 1487623716. 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
What is John T. Fiedler's education?
John T. Fiedler attended Loyola University of Chicago, Stritch School of Medicine, graduating in 1993. This comes from the CMS National Downloadable File.
CMS public data
How long has John T. Fiedler been practicing?
John T. Fiedler has 33 years experience. Calculated from a graduation year of 1993, reported in the CMS National Downloadable File.
CMS public data
What is John T. Fiedler known for?
According to Medicare billing data, John T. Fiedler performs procedures including insertion of needle into vein for collection of blood sample; provides treatments such as influenza vaccine, inactivated and administration and interpretation of patient-focused health risk assessment, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has John T. Fiedler confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by John T. Fiedler. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.