Physician Profile
Nathan M. Markwart, D.O.
Unclaimed ProfileAbout Dr. Markwart
Based in Boca Raton, FL, Nathan M. Markwart, D.O. is listed in the NPI registry under critical care medicine. According to Medicare claims data, Nathan cared for 350 Medicare patients across 608 services. The services billed most often include critical care, first 30-74 minutes, emergent insertion of breathing tube into windpipe using an endoscope, and insertion of non-tunneled central venous tube for infusion (5 years or older).
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
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
- (561) 939-0200
- Email not available
Practice Locations
1601 CLINT MOORE RD SUITE 100
Boca Raton, FL 33487
Conditions Commonly Evaluated or Treated
Within Critical Care 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
Blood & metabolism
- Dangerous electrolyte imbalance
Brain & nerve
- Hemorrhagic stroke
- Ruptured Brain Aneurysm
- Spinal Cord Injury
- Sudden Muscle Weakness Crisis
Brain & Nervous System
- Brain Swelling
- Fainting and syncope
- ICU Delirium and Confusion
- Ischemic stroke
- Status epilepticus
- Traumatic brain injury
Breathing & Lungs
- Collapsed lung
- Respiratory failure
- Severe asthma attack
- Severe Blood Clot in Lung
- Severe Pneumonia
Digestive emergencies
- Severe internal bleeding
Environmental emergencies
- Heat stroke
- Smoke Inhalation
Heart & Circulation
- Cardiac Arrest
- Shock
- Torn Aorta
Heart & vascular
- Dangerous high blood pressure
- Sudden Heart Muscle Weakness
Infection & Sepsis
- Sepsis or blood infection
- Severe Allergic Shock
Infections
- Flesh-Eating Infection
- Meningitis
Injury & trauma
- Broken ribs
- Serious car crash injuries in child
Lung & breathing
- Critical COVID Complications
- Fluid in the Lungs
Medication reactions
- Severe Skin Peeling Reaction
Metabolic Emergencies
- Dangerous high blood sugar
- High Acid in Blood
Muscle & kidney
- Crush Injury
Organ Failure
- Acute kidney injury
- Multiple Organ Failure
- Severe Pancreatitis
- Sudden Liver Failure
Pregnancy emergencies
- Seizures During Pregnancy
Recovery
- Post-ICU Weakness
Substance emergencies
- Alcohol withdrawal
Toxicity & Trauma
- Drug overdose or poisoning
- Hypothermia and frostbite
- Severe Burns
Procedures & services
Airway & Breathing
- Airway Scope and Suctioning
- Breathing machine management
- Chest tube insertion
- Emergency intubation
- Tracheostomy
Airway procedures
- Emergency surgical airway
Brain procedures
- Skull Bone Removal For Pressure Relief
Breathing support
- BiPAP therapy
- Breathing tube removal
- Inhaled Nitric Oxide Therapy
- Oxygen therapy
Consultation & Recovery
- Family ICU Consultation and Goals of Care
- Post-ICU Recovery Care
Digestive procedures
- Urgent upper endoscopy
Emergency surgery
- Emergency Chest Opening for Trauma
Fluid Drainage
- Draining lung fluid
- Paracentesis
Heart procedures
- Heart Fluid Drainage (Pericardiocentesis)
Heart support
- Intra-aortic balloon pump placement
ICU recovery
- Bedsore and Wound Dressing
- Early ICU Physical Rehab
Lab tests & monitoring
- Blood Gas Testing
Life Support
- Cardioversion for rapid heartbeat
- CPR and defibrillation
- ECMO (Heart-Lung Machine)
- Stomach Positioning for Lung Failure
- Targeted Body Cooling
- Temporary Pacemaker Placement
- Ventilator Support
Medication therapies
- Emergency Clot-Busting Medication
Medications & Infusions
- Emergency Blood Transfusion
- ICU Sedation and Pain Relief
- IV Blood Pressure Support (Pressors)
Monitoring
- Bladder and Belly Pressure Check
- Brain Blood Flow Ultrasound
- Brain Pressure Monitor Placement
- Continuous Brain Wave Monitoring
- Emergency ultrasound
- Heart Pressure Catheter Monitoring
- Lumbar puncture
Nutrition & Digestion
- Feeding tube placement
Nutrition support
- IV Nutrition For Preemies
Organ Support
- Continuous Dialysis in the ICU
- Plasmapheresis
Vascular Access
- Arterial catheter placement
- Central line placement
Procedures Most Often Billed to Medicare
608 services · 350 patients · 6 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Emergent insertion of breathing tube into windpipe using an endoscope | Procedure | 31500 |
16 | As often as other peers in Critical Care Medicine |
| Insertion of non-tunneled central venous tube for infusion (5 years or older) | Procedure | 36556 |
15 | As often as other peers in Critical Care Medicine |
| Insertion of artery tube for blood sampling or infusion through skin | Procedure | 36620 |
14 | As often as other peers in Critical Care Medicine |
| Insertion of tube connecting vein to vein for hemodialysis | Procedure | 36800 |
13 | Too few peers to compare |
| Critical care, first 30-74 minutes | Office visit | 99291 |
538 | More than most peers in Critical Care Medicine |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
12 | Less often than most peers in Critical Care 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.
Related specialists at this location 6
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.
Other critical care physicians in Boca Raton 7
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2008 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Emergent insertion of breathing tube into windpipe using an endoscope 8
Providers in FL who bill this service to Medicare most often.
Common questions
What is Nathan M. Markwart's specialty?
Nathan M. Markwart is a critical care physician in Boca Raton, FL. That is the designation recorded for this NPI in the federal registry, where it is listed as “Critical Care Medicine”.
NPI registry
Where can I find Nathan M. Markwart?
Nathan M. Markwart is listed at 1601 Clint Moore Rd Suite 100, Boca Raton, FL 33487. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Nathan M. Markwart?
The number on file is (561) 939-0200. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Nathan M. Markwart's NPI number?
Nathan M. Markwart's National Provider Identifier is 1265774574. 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 Nathan M. Markwart's education?
Nathan M. Markwart attended Other, graduating in 2008. This comes from the CMS National Downloadable File.
CMS public data
How long has Nathan M. Markwart been practicing?
Nathan M. Markwart has 18 years experience. Calculated from a graduation year of 2008, reported in the CMS National Downloadable File.
CMS public data
What is Nathan M. Markwart known for?
According to Medicare billing data, Nathan M. Markwart performs procedures including emergent insertion of breathing tube into windpipe using an endoscope, insertion of non-tunneled central venous tube for infusion and insertion of artery tube for blood sampling or infusion through skin, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Nathan M. Markwart confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Nathan M. Markwart. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.