Physician Profile
Unclaimed ProfileAbout 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.
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
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (630) 933-4700
- Email not available
Practice Locations
25 N WINFIELD RD
Winfield, IL 60190
Procedures Most Often Billed to Medicare
420 services · 227 patients · 4 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
255 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
76 |
| Hospital discharge day management, more than 30 minutes | Office visit | 99239 |
58 |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
31 |
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. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “HOSPITALIST”.
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. Guide.md cannot book appointments or pass on messages — please call the office directly.
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
Is this your profile?
Verify your identity to control how patients — and AI assistants — describe you.
Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.