Physician Profile
Unclaimed ProfileAbout GRZESIK
Gregory Wayne Grzesik, D.O. is a hospitalist practicing in Weston, WI. Gregory trained at Lake Erie College of Osteopathic Medicine, Erie, graduating in 2013. Gregory is also listed as specializing in internal medicine. According to Medicare claims data, Gregory cared for 106 Medicare patients across 190 services.
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
- (715) 393-1220
- Email not available
Practice Locations
3400 MINISTRY PKWY
Weston, WI 54476
Procedures Most Often Billed to Medicare
190 services · 106 patients · 3 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
134 |
| Hospital discharge day management, more than 30 minutes | Office visit | 99239 |
36 |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Office visit | 99222 |
20 |
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 5
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 Weston 3
Same specialty, same city.
More connections — 16 related providers in 2 groups
Trained at Lake Erie College of Osteopathic Medicine, Erie 8
Other providers in the same specialty who trained at the same institution.
Class of 2013 at Lake Erie College of Osteopathic Medicine, Erie 8
Providers who graduated from the same medical school in the same year.
Common questions
What does Dr. Grzesik specialize in?
Dr. Grzesik is a hospitalist in Weston, WI. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “HOSPITALIST”.
NPI registry
Where is Dr. Grzesik located?
Dr. Grzesik is listed at 3400 MINISTRY PKWY, Weston, WI 54476. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Grzesik's phone number?
The number on file is (715) 393-1220. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Grzesik's NPI number?
Dr. Grzesik's National Provider Identifier is 1316389372. 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. Grzesik go to medical school?
Dr. Grzesik attended Lake Erie College of Osteopathic Medicine, Erie, graduating in 2013. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Grzesik been practicing?
Dr. Grzesik has 13 years experience. Calculated from a graduation year of 2013, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Grzesik do most often?
According to Medicare billing data, Dr. Grzesik 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. Grzesik confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Grzesik. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.