J Vasc Access
Anti-Bacterial AgentsAnti-Infective AgentsCatheterization, Peripheral
Dr. Michael Edward Grzelak, MD
NPI1386808913PAC ID0244424075
- Medicare services, 2024
- 905
- Medicare patients, 2024
- 429
- Part D claims, 2024
- 172
- Publications
- 1
- MIPS score, 2024
- 96
- Practice address
- 25 North Winfield Road, Winfield, IL 60190
- Practice phone
- Call (630) 682-1600
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Grzelak's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Michael Edward Grzelak is a hospitalist in Winfield, Illinois
Dr. Grzelak practices at Northwestern Medicine Central DuPage Hospital in Winfield, Illinois, part of Northwestern Memorial HealthCare.
Dr. Grzelak's NPI, 1386808913, was assigned on July 14, 2008. Dr. Grzelak holds Illinois license 036124898.
NPI and contact details
- NPI
- 1386808913NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0244424075
- NPI enumeration date
- July 14, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (630) 682-1600
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael Edward Grzelak practices at Northwestern Medicine Central DuPage Hospital in Winfield, Illinois
Dr. Grzelak's primary practice is Northwestern Medicine Central DuPage Hospital, at 25 North Winfield Road, Winfield, IL 60190 in Du Page County. The practice phone is (630) 682-1600.
- Northwestern Medicine Central DuPage Hospital25 North Winfield Road, Winfield, IL 60190 · Du Page CountyPhone(630) 682-1600
Source: Dmand AI Affiliation Data
Dr. Michael Edward Grzelak is affiliated with 4 sites of care and 2 medical groups
Dr. Grzelak's primary practice is Northwestern Medicine Central DuPage Hospital in Winfield, Illinois, part of Northwestern Memorial HealthCare. Dr. Grzelak is also affiliated with Northwestern Medicine Valley West Hospital. The medical group on file is Northwestern Medicine Regional Medical Group. Dmand AI also links Dr. Grzelak to 1 more breast imaging center, 1 clinical lab and 1 medical group, each named with a free account.
Northwestern Medicine Valley West HospitalNorthwestern Medicine Regional Medical Group1 breast imaging centerName with a free account1 clinical labName with a free account1 medical groupName with a free account
See all 6 affiliations for Dr. GrzelakSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Michael Edward Grzelak's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Grzelak practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northwestern Medicine Central DuPage Hospital | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every hospital where Dr. Grzelak practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across Northwestern Memorial HealthCare and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Michael Edward Grzelak is one of 1,321 hospitalists in Illinois
Hospitalist is Dr. Grzelak's primary specialty in the NPI Registry, under taxonomy code 208M00000X. Dr. Grzelak is licensed in Illinois.
Specialties and state licenses
- Hospitalist, IllinoisPrimary
Hospitalists near Dr. Grzelak
Counts of hospitalists with a Dmand AI profile, by place and practice. Each opens the list.
1,321hospitalists in Illinois61hospitalists in Winfield63hospitalists at Northwestern Medicine Central DuPage Hospital
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Michael Edward Grzelak billed Medicare for 905 services in 2024
CMS data shows 905 Medicare services from Dr. Grzelak across 7 procedure codes in 2024, for 429 Medicare patients. Medicare paid $82,367 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2024905
Medicare patients429
Paid by Medicare$82,367
Procedure codes7
Dr. Grzelak's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 8062024: 90512%
Dr. Grzelak compared with the Illinois median for hospitalists, 2024
- Dr. Grzelak
- Illinois median
- Medicare services
- 905vs 54367% above
- Medicare patients
- 429vs 24277% above
- Part D claims
- 16vs 5370% below
Medians across 1,248 hospitalists in Illinois with Dmand AI profiles that report each measure.
Dr. Grzelak's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Grzelak?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Grzelak and other hospitalists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Michael Edward Grzelak treated 429 Medicare patients in 2024, average age 77
CMS counts 429 Medicare patients who saw Dr. Grzelak in 2024. The largest group is 75 to 84, with 173 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 17% are also on Medicaid. Their average risk score is 2.48, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Grzelak's median patient age at 76, with 56% women.
Medicare patients, 2024429
Average age77
Average risk score2.48
Also on Medicaid17%
Dr. Grzelak's Medicare patients by age, 2024
Dr. Grzelak's Medicare patients by sex, 2024
- Women22653%
- Men20347%
Chronic conditions among Dr. Grzelak's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis63%
- Ischemic heart disease53%
- Heart failure46%
- Chronic kidney disease45%
- Diabetes45%
- Anxiety43%
Share of Medicare patients with each condition. A patient can have several.
Dr. Grzelak's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 76
Patient panel by sex, all payers
- Women56%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Michael Edward Grzelak wrote 172 Medicare Part D claims in 2024
In 2024, Dr. Grzelak wrote 172 Medicare Part D claims for 98 patients. 82% of them were for generic drugs. CMS names the drug for 16 of them, across 1 drug with 11 or more claims each, at $94 in total drug cost. In 2021, CMS named 80 claims across 5 drugs.
Part D claims, 2024172
Drugs named by CMS1
Total drug cost$94
Part D patients98
Dr. Grzelak's Part D claims by kind of drug, 2024
- Generic141 claims82%
- Brand-name and other31 claims18%
Dr. Grzelak's most prescribed drugs by claims, 2022
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Grzelak's Part D claims, 2024
- Opioids7%12 of 172 claims
- Antibiotics17%30 of 172 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2021 to 2022
- 2021
- 2022
- Claims for drugs CMS names
- 2021: 802022: 1680%
Drugs named by CMS: 1 in 2022, 5 in 2021.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Michael Edward Grzelak scored 96 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 96 out of 100 for Dr. Grzelak for performance year 2024, reported through an alternative payment model (APM). Dr. Grzelak accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Grzelak's MIPS scores, performance year 2024
- 96of 100Final score
- 88.5of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
For MedTech and pharma teams
Find hospitalists like Dr. Grzelak by procedure volume and prescribing
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Michael Edward Grzelak has 1 publication on record
Dmand AI links 1 paper to Dr. Grzelak in 2021.
Papers1
Recent publications by Dr. Grzelak
See who Dr. Grzelak researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Grzelak works with, so you can find a warm path to the right hospitalists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Michael Edward Grzelak received $162 in industry payments in 2025
CMS Open Payments shows 2 general payments to Dr. Grzelak from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Davol Inc. paid the most, $162.
Companies that paid Dr. Grzelak the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Michael Edward Grzelak's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Michael Edward Grzelak
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Michael Edward Grzelak's NPI number?
Dr. Michael Edward Grzelak's NPI number is 1386808913. It was assigned on July 14, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael Edward Grzelak?
Dr. Michael Edward Grzelak is a hospitalist in Winfield, Illinois. The primary specialty in the NPI Registry is Hospitalist Physician (taxonomy code 208M00000X).
Where does Dr. Michael Edward Grzelak practice?
Dr. Grzelak practices at 25 North Winfield Road, Winfield, IL 60190. Dr. Grzelak's primary practice is Northwestern Medicine Central DuPage Hospital in Winfield, Illinois, part of Northwestern Memorial HealthCare. Dmand AI also links Dr. Grzelak to 1 breast imaging center, 1 clinical lab and 1 medical group.
What is Dr. Michael Edward Grzelak's office phone number?
The practice phone on file for Dr. Grzelak is (630) 682-1600.
What is Dr. Michael Edward Grzelak's medical license number?
Dr. Grzelak holds Illinois license 036124898.
Which hospitals is Dr. Michael Edward Grzelak affiliated with?
Dr. Grzelak practices at Northwestern Medicine Central DuPage Hospital in Winfield, Illinois. Dr. Grzelak is also affiliated with Northwestern Medicine Valley West Hospital.
What medical group is Dr. Michael Edward Grzelak part of?
Dr. Grzelak is linked to Northwestern Medicine Regional Medical Group. Dmand AI links Dr. Grzelak to 1 more medical group.
Does Dr. Michael Edward Grzelak accept Medicare?
Yes. CMS data shows Dr. Grzelak billed Medicare for 905 services in 2024, and Dr. Grzelak accepts Medicare assignment.
What is Dr. Michael Edward Grzelak's MIPS score?
Dr. Grzelak's MIPS final score for performance year 2024 is 96 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Dr. Michael Edward Grzelak see?
CMS counts 429 Medicare patients who saw Dr. Grzelak in 2024, with an average age of 77.
Show 5 more questionsShow fewer questions
What services does Dr. Michael Edward Grzelak bill to Medicare?
In 2024, Dr. Grzelak's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99232) and hospital inpatient care (99239).
What drugs does Dr. Michael Edward Grzelak prescribe most?
In 2022 Medicare Part D data, Dr. Grzelak's most prescribed drugs by claims were Atorvastatin Calcium.
Has Dr. Michael Edward Grzelak received payments from drug or device companies?
CMS Open Payments shows $162 in general payments to Dr. Grzelak from 1 company from 2025 to 2025. The largest total came from Davol Inc.
How long has Dr. Michael Edward Grzelak been practicing?
Dr. Grzelak graduated from medical school in 2007, 19 years ago.
Does Dr. Michael Edward Grzelak do research?
Dmand AI links 1 publication to Dr. Grzelak.
Selling to hospitalist practices?
See hospitalists in Illinois by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card