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Edit this profileAt a glance
- 9300 Dewitt Loop, Fort Belvoir, VA 22060
About Dr. Nau
Based in Fort Belvoir, VA, Mark Nau, M.D. is listed in the NPI registry under critical care (intensivists). Mark graduated from Indiana University School of Medicine in 2016. Mark is also listed as specializing in internal medicine, pulmonary disease, and critical care medicine. According to Medicare claims data, the services billed most often include critical care, first 30-74 minutes. NPI 1033579479 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
- (571) 231-1605
- Email not available
Practice Locations
9300 DEWITT LOOP
Fort Belvoir, VA 22060
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
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
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
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
19 services · 18 patients · 1 distinct code
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Critical care, first 30-74 minutes | Office visit | 99291 |
19 | Less often than most peers in Critical Care (Intensivists) |
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.
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.
Trained at Indiana University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
More connections — 8 related providers in 1 group
Class of 2016 at Indiana University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Common questions
What is Mark Nau's specialty?
Mark Nau is a critical care (intensivists) in Fort Belvoir, VA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where can I find Mark Nau?
Mark Nau is listed at 9300 Dewitt Loop, Fort Belvoir, VA 22060. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Mark Nau?
The number on file is (571) 231-1605. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Mark Nau?
Mark Nau's National Provider Identifier is 1033579479. 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 Mark Nau's education?
Mark Nau attended Indiana University School of Medicine, graduating in 2016. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Mark Nau have?
Mark Nau has 10 years experience. Calculated from a graduation year of 2016, reported in the CMS National Downloadable File.
CMS public data
What is Mark Nau known for?
According to Medicare billing data, Mark Nau the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Mark Nau's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Mark Nau. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.