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Edit this profileWhere to find Aaron Charniak, MD
- Rockville location main office
9901 Medical Center Dr, Rockville, MD 20850 - Port Jefferson location
75 N Country Rd, Port Jefferson, NY 11777
About Dr. Charniak
Aaron Charniak, MD is a hospitalist practicing in Rockville, MD. Aaron is also listed as specializing in internal medicine. According to Medicare claims data, Aaron cared for 359 Medicare patients across 641 services. The services billed most often include subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes, subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes, and hospital discharge day management, more than 30 minutes. This provider record is associated with NPI 1063827350.
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
- (240) 826-6000
- Email not available
Practice Locations
9901 MEDICAL CENTER DR
Rockville, MD 20850
75 N Country Rd
Port Jefferson, NY 11777
Conditions Commonly Evaluated or Treated
Within Hospital 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
Brain & nerves
Breathing & lungs
Digestive health
- C. diff diarrhea
- Severe diverticulitis flare-up
- Stomach or intestinal bleeding
- Acute gallbladder inflammation
- Acute pancreatitis
- Ascites
- Bowel obstruction
Endocrine
- Dangerously High Calcium
General medical
- Hip fracture medical care
- Low sodium or electrolyte imbalance
- Post-surgery fever or infection
- Severe dehydration
- Short stature and growth concerns
Heart & Circulation
- A-Fib Flare-Up
- Heart Attack Inpatient Care
- Shock
Heart & circulation
- Heart failure flare-up
- Dangerous high blood pressure
- Deep vein thrombosis
- Severe anemia
- Supraventricular tachycardia
- Unexplained chest pain
Infections
- Complicated Bladder Infection
- Severe COVID-19 illness
- Severe flu illness
- Bone infection
- Cellulitis
- Flesh-Eating Infection
- Infective endocarditis
- Sepsis or blood infection
Liver & Digestive
- Severe Fecal Impaction
- Hepatic encephalopathy
- Sudden Liver Failure
Lung Infections
- Hospital-Acquired Pneumonia
- Severe Pneumonia
Nutrition
- Severe Malnutrition In Hospital
Allergic Reactions
Blood Clots
Blood Disorders
Brain & Nerves
Emergencies
Hormones & diabetes
Kidney & urinary
Lungs & Breathing
Procedures & services
Access & tubes
- Feeding or stomach tube insertion
- Urinary catheter insertion
- Arterial catheter placement
- Central line placement
- PICC line placement coordination
Addiction Medicine
- Inpatient Opioid Withdrawal Induction
Breathing support
- BiPAP or CPAP therapy
- Breathing machine management
- Oxygen therapy
Critical Care
- Continuous IV Sedation Management
- Rapid Response Team Call
- CPR and defibrillation
Diagnostic procedures
- Hospital heart rhythm monitoring
- Swallowing safety evaluation coordination
- Emergency ultrasound
- Lumbar puncture
Emergency Care
- Blood Thinner Reversal
Heart Procedures
- Bedside Heart Ultrasound
- Electrical cardioversion
Hospital services
- Alcohol detox monitoring
- Comfort care transition
- Hospital admission
- Hospital discharge planning
- Hospital observation care
- Hospital wound and bed sore care
- Inpatient dialysis coordination
- Inpatient physical therapy evaluation
- Post-surgery hospital recovery care
- Pre-surgery medical clearance
- Rehab or nursing home placement evaluation
- Specialist consultation coordination
- Fall risk assessment
- Medication management
Kidney Care
- Inpatient Peritoneal Dialysis Care
Medication & fluids
- Blood thinner drip management
- IV antibiotic treatment
- IV electrolyte replacement
- Patient-Controlled Analgesia (PCA) Setup
- Blood sugar insulin drip
- Blood transfusion
- IV fluids
Mental Health
- Medical-Psychiatric Inpatient Evaluation
Neurological Care
- Continuous Neurological Checks
- Emergency Stroke Response
Rehabilitation
- Inpatient Occupational Therapy Evaluation
Urinary Care
- Continuous Bladder Irrigation
Airway & Breathing
Diagnostic Testing
Draining fluids
Joint Procedures
Lung Procedures
Nutrition Support
Procedures Most Often Billed to Medicare
641 services · 359 patients · 4 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
267 | More often than most peers in Hospitalist |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
211 | More often than most peers in Hospitalist |
| Hospital discharge day management, more than 30 minutes | Office visit | 99239 |
97 | As often as other peers in Hospitalist |
| Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | Office visit | 99231 |
66 | More often than most peers in Hospitalist |
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 Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2014 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What kind of doctor is Dr. Charniak?
Dr. Charniak is a hospitalist in Rockville, MD. That is the designation recorded for this NPI in the federal registry.
NPI registry
What is Dr. Charniak's address?
Dr. Charniak is listed at 9901 Medical Center Dr, Rockville, MD 20850. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Charniak?
The number on file is (240) 826-6000. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Charniak's NPI number?
Dr. Charniak's National Provider Identifier is 1063827350. 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. Charniak train?
Dr. Charniak attended Other, graduating in 2014. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Charniak been practicing?
Dr. Charniak has 12 years experience. Calculated from a graduation year of 2014, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Charniak perform?
According to Medicare billing data, Dr. Charniak 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
Has Dr. Charniak confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Charniak. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.