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Edit this profileWhere to find Dagan Hammar, MD
- Winfield location main office
25 N Winfield Rd, Winfield, IL 60190 - Aurora location
12605 E 16th Ave, Aurora, CO 80045
About Dr. Hammar
Listed in the NPI registry as a hospitalist, Dagan Hammar, MD practices in Winfield, IL. Dagan graduated from Western Michigan Un Homer Stryker School of Med in 2019. Medicare claims data shows Dagan provided 420 services to 227 patients. 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. NPI 1194287151 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
- (630) 933-4700
- Email not available
Practice Locations
25 N WINFIELD RD
Winfield, IL 60190
12605 E 16th Ave
Aurora, CO 80045
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
Allergic Reactions
- Severe Allergic Reaction
Blood Clots
Blood Disorders
- Sickle Cell Pain Crisis
Brain & nerves
Brain & Nerves
Breathing & lungs
Digestive health
- Acute gallbladder inflammation
- Acute pancreatitis
- Ascites
- Bowel obstruction
- C. diff diarrhea
- Severe diverticulitis flare-up
- Stomach or intestinal bleeding
Emergencies
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
- Dangerous high blood pressure
- Deep vein thrombosis
- Heart failure flare-up
- Severe anemia
- Supraventricular tachycardia
- Unexplained chest pain
Hormones & diabetes
Infections
- Bone infection
- Cellulitis
- Complicated Bladder Infection
- Flesh-Eating Infection
- Infective endocarditis
- Sepsis or blood infection
- Severe COVID-19 illness
- Severe flu illness
Kidney & urinary
Liver & Digestive
- Hepatic encephalopathy
- Severe Fecal Impaction
- Sudden Liver Failure
Lung Infections
- Hospital-Acquired Pneumonia
- Severe Pneumonia
Lungs & Breathing
Nutrition
- Severe Malnutrition In Hospital
Procedures & services
Access & tubes
- Arterial catheter placement
- Central line placement
- Feeding or stomach tube insertion
- PICC line placement coordination
- Urinary catheter insertion
Addiction Medicine
- Inpatient Opioid Withdrawal Induction
Airway & Breathing
Breathing support
- BiPAP or CPAP therapy
- Breathing machine management
- Oxygen therapy
Critical Care
- Continuous IV Sedation Management
- CPR and defibrillation
- Rapid Response Team Call
Diagnostic procedures
- Emergency ultrasound
- Hospital heart rhythm monitoring
- Lumbar puncture
- Swallowing safety evaluation coordination
Diagnostic Testing
- Blood Culture Workup
Draining fluids
Emergency Care
- Blood Thinner Reversal
Heart Procedures
- Bedside Heart Ultrasound
- Electrical cardioversion
Hospital services
- Alcohol detox monitoring
- Comfort care transition
- Fall risk assessment
- Hospital admission
- Hospital discharge planning
- Hospital observation care
- Hospital wound and bed sore care
- Inpatient dialysis coordination
- Inpatient physical therapy evaluation
- Medication management
- Post-surgery hospital recovery care
- Pre-surgery medical clearance
- Rehab or nursing home placement evaluation
- Specialist consultation coordination
Joint Procedures
Kidney Care
- Inpatient Peritoneal Dialysis Care
Lung Procedures
Medication & fluids
- Blood sugar insulin drip
- Blood thinner drip management
- Blood transfusion
- IV antibiotic treatment
- IV electrolyte replacement
- IV fluids
- Patient-Controlled Analgesia (PCA) Setup
Mental Health
- Medical-Psychiatric Inpatient Evaluation
Neurological Care
- Continuous Neurological Checks
- Emergency Stroke Response
Nutrition Support
Rehabilitation
- Inpatient Occupational Therapy Evaluation
Urinary Care
- Continuous Bladder Irrigation
Procedures Most Often Billed to Medicare
420 services · 227 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 |
255 | 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 |
76 | Less often than most peers in Hospitalist |
| Hospital discharge day management, more than 30 minutes | Office visit | 99239 |
58 | As often as other peers in Hospitalist |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
31 | Less 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.
Other hospitalists at this location 4
Same specialty, same street address — most likely the same department or group.
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 hospitalists in Winfield 5
Same specialty, same city.
More connections — 16 related providers in 2 groups
Trained at Western Michigan Un Homer Stryker School of Med 8
Other providers in the same specialty who trained at the same institution.
Class of 2019 at Western Michigan Un Homer Stryker School of Med 8
Providers who graduated from the same medical school in the same year.
Common questions
What is Dr. Hammar's specialty?
Dr. Hammar is a hospitalist in Winfield, IL. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where can I find Dr. Hammar?
Dr. Hammar is listed at 25 N Winfield Rd, Winfield, IL 60190. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Hammar?
The number on file is (630) 933-4700. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Dr. Hammar?
Dr. Hammar's National Provider Identifier is 1194287151. 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 Dr. Hammar's medical education?
Dr. Hammar attended Western Michigan Un Homer Stryker School of Med, graduating in 2019. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Hammar have?
Dr. Hammar has 7 years experience. Calculated from a graduation year of 2019, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Hammar known for?
According to Medicare billing data, Dr. Hammar 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 Dr. Hammar's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Hammar. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.