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Edit this profileAt a glance
- 929 S Tamiami Trl, Suite 101, Osprey, FL 34229
About Dr. Wassenaar
Based in Osprey, FL, John W. Wassenaar, MD is listed in the NPI registry under internal medicine. John graduated from University of Florida College of Medicine in 1985. John is also listed as specializing in pediatrics. Medicare claims data shows John provided 1,057 services to 663 patients. The services billed most often include established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit, and routine electrocardiogram (ecg) using at least 12 leads with interpretation and report. NPI 1669462297 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
- (941) 917-4700
- Email not available
Practice Locations
929 S TAMIAMI TRL SUITE 101
Osprey, FL 34229
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
- Blood Pressure Check
- Heart monitor
Heart & circulation
Heart health
Hospital-based procedures
Imaging referral
Immunizations
Infection & Microbiology Tests
- STI and STD Screening
- H. Pylori Breath Test
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
- At-home sleep test
Most searched procedures
Bones & Joints
Brain and nerves
Digestive
- Endoscopy
Exams & Consultations
Lab tests
Minor procedures
- Ingrown toenail removal
- Suture removal
Office procedures
Pain management
Preventive & Routine Care
Sexual health
Procedures Most Often Billed to Medicare
1,057 services · 663 patients · 4 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | Treatment | 93000 |
104 | More often 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 |
710 | More than most peers in Internal Medicine |
| Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | Billing code | G0439 |
230 | More often than most peers in Internal Medicine |
| Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and | Billing code | G0180 |
13 | Less 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 7
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 4
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 — 25 related providers in 4 groups
Trained at University of Florida College of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1985 at University of Florida College of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 8
Providers in FL who bill this service to Medicare most often.
Common questions
What does Dr. Wassenaar specialize in?
Dr. Wassenaar is an internist in Osprey, FL. That is the designation recorded for this NPI in the federal registry, where it is listed as “Internal Medicine”.
NPI registry
Where is Dr. Wassenaar located?
Dr. Wassenaar is listed at 929 S Tamiami Trl Suite 101, Osprey, FL 34229. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Wassenaar's phone number?
The number on file is (941) 917-4700. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Dr. Wassenaar?
Dr. Wassenaar's National Provider Identifier is 1669462297. 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. Wassenaar go to medical school?
Dr. Wassenaar attended University of Florida College of Medicine, graduating in 1985. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Wassenaar have?
Dr. Wassenaar has 41 years experience. Calculated from a graduation year of 1985, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Wassenaar do most often?
According to Medicare billing data, Dr. Wassenaar provides treatments such as routine electrocardiogram using at least 12 leads with interpretation and report, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Wassenaar's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Wassenaar. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.