Dr. Jaroslaw P. Siwik, MD
- Medicare services, 2024
- 604
- Medicare patients, 2024
- 190
- Part D claims, 2024
- 9,552
- Hospital affiliations
- 3
- Industry payments
- $1,788
- Practice address
- 601 John Street, Kalamazoo, MI 49007
- Practice phone
- Call (269) 341-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Siwik'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. Jaroslaw P. Siwik is an internist in Kalamazoo, Michigan
Dr. Siwik practices at Bronson Methodist Hospital in Kalamazoo, Michigan, part of Bronson Healthcare Group.
Dr. Siwik's NPI, 1043280522, was assigned on January 25, 2006. Dr. Siwik graduated from Wayne State University School of Medicine in 1997. Dr. Siwik holds Michigan license 4301070284.
- NPI
- 1043280522NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2163494188
- NPI enumeration date
- January 25, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (269) 341-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 55
- Medical school graduation
- 1997
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Jaroslaw P. Siwik practices at Bronson Methodist Hospital in Kalamazoo, Michigan
Dr. Siwik's primary practice is Bronson Methodist Hospital, at 601 John Street, Kalamazoo, MI 49007 in Kalamazoo County. The practice phone is (269) 341-6000.
- Bronson Methodist Hospital601 John Street, Kalamazoo, MI 49007 · Kalamazoo CountyPhone(269) 341-6000
Source: Dmand AI Affiliation Data
Dr. Jaroslaw P. Siwik is affiliated with 7 sites of care and 1 medical group
Dr. Siwik's primary practice is Bronson Methodist Hospital in Kalamazoo, Michigan, part of Bronson Healthcare Group. Dr. Siwik is also affiliated with Bronson Battle Creek Hospital. The medical group on file is Bronson Medical Group. Dmand AI also links Dr. Siwik to 1 more hospital, 3 home health agencies and 1 group practice or clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Jaroslaw P. Siwik's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Siwik practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Bronson Methodist Hospital | Available with a free account |
| +6 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Bronson Healthcare Group and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Jaroslaw P. Siwik is one of 4,804 internists in Michigan
Internal medicine is Dr. Siwik's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Siwik is licensed in Michigan.
Specialties and state licenses
- Internal medicine, MichiganPrimary
Internists near Dr. Siwik
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Jaroslaw P. Siwik billed Medicare for 604 services in 2024
CMS data shows 604 Medicare services from Dr. Siwik across 6 procedure codes in 2024, for 190 Medicare patients. Medicare paid $36,813 for them. Every service was in an office.
Dr. Siwik's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3152024: 3429%
- Other services
- 2023: 1052024: 262150%
Dr. Siwik compared with the Michigan median for internists, 2024
- Dr. Siwik
- Michigan median
- Medicare services
- 604vs 42343% above
- Medicare patients
- 190vs 15919% above
- Part D claims
- 8,855vs 31428.2 times
Medians across 4,524 internists in Michigan with Dmand AI profiles that report each measure.
Dr. Siwik'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. Siwik?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Siwik and other internists in Michigan.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Jaroslaw P. Siwik treated 190 Medicare patients in 2024, average age 76
CMS counts 190 Medicare patients who saw Dr. Siwik in 2024. The largest group is 65 to 74, with 82 patients. 73% of them have high cholesterol, and 69% have high blood pressure. Their average risk score is 1.01, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Siwik's median patient age at 71, with 41% women.
Dr. Siwik's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Siwik's Medicare patients by sex, 2024
- Women8444%
- Men10656%
Chronic conditions among Dr. Siwik's Medicare patients, 2024
- High cholesterol73%
- High blood pressure69%
- Arthritis37%
- Chronic kidney disease29%
- Diabetes29%
- Anxiety22%
- Mood disorders21%
- Depression17%
Share of Medicare patients with each condition. A patient can have several.
Dr. Siwik's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women41%
- Men58%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Jaroslaw P. Siwik wrote 9,552 Medicare Part D claims in 2024
In 2024, Dr. Siwik wrote 9,552 Medicare Part D claims for 658 patients. 87% of them were for generic drugs. CMS names the drug for 8,855 of them, across 144 drugs with 11 or more claims each, at $795,363 in total drug cost. In 2023, CMS named 8,212 claims across 135 drugs.
Dr. Siwik's Part D claims by kind of drug, 2024
- Generic8,353 claims87%
- Brand-name1,161 claims12%
- Other38 claims0%
Dr. Siwik's most prescribed drugs by claims, 2024
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. Siwik's Part D claims, 2024
- Opioids5%454 of 9,552 claims
- Antibiotics1%132 of 9,552 claims
- Antipsychotics, patients 65 and over0%18 of 9,552 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, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 8,2122024: 8,8558%
Drugs named by CMS: 144 in 2024, 135 in 2023.
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. Jaroslaw P. Siwik offers telehealth to Medicare patients
Dr. Siwik accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Siwik as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Jaroslaw P. Siwik received $1,788 in industry payments from 2016 to 2024
CMS Open Payments shows 128 general payments to Dr. Siwik from 27 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 99% of the total. Novo Nordisk Inc paid the most, $501.
General payments to Dr. Siwik by program year, 2016 to 2024
General payments to Dr. Siwik by kind, 2016 to 2024
- Food and beverage$1,77799%
- Education$101%
Companies that paid Dr. Siwik the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Jaroslaw P. Siwik graduated from Wayne State University School of Medicine
Dr. Siwik graduated from Wayne State University School of Medicine in 1997.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Jaroslaw P. Siwik'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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| 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. Jaroslaw P. Siwik
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. Jaroslaw P. Siwik's NPI number?
Dr. Jaroslaw P. Siwik's NPI number is 1043280522. It was assigned on January 25, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Jaroslaw P. Siwik?
Dr. Jaroslaw P. Siwik is an internist in Kalamazoo, Michigan. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Jaroslaw P. Siwik practice?
Dr. Siwik practices at 601 John Street, Kalamazoo, MI 49007. Dr. Siwik's primary practice is Bronson Methodist Hospital in Kalamazoo, Michigan, part of Bronson Healthcare Group. Dmand AI also links Dr. Siwik to 1 hospital, 3 home health agencies and 1 group practice or clinic.
What is Dr. Jaroslaw P. Siwik's office phone number?
The practice phone on file for Dr. Siwik is (269) 341-6000.
What is Dr. Jaroslaw P. Siwik's medical license number?
Dr. Siwik holds Michigan license 4301070284.
Which hospitals is Dr. Jaroslaw P. Siwik affiliated with?
Dr. Siwik practices at Bronson Methodist Hospital in Kalamazoo, Michigan. Dr. Siwik is also affiliated with Bronson Battle Creek Hospital. Dmand AI links Dr. Siwik to 1 more hospital.
What medical group is Dr. Jaroslaw P. Siwik part of?
Dr. Siwik is linked to Bronson Medical Group.
Does Dr. Jaroslaw P. Siwik accept Medicare?
Yes. CMS data shows Dr. Siwik billed Medicare for 604 services in 2024, and Dr. Siwik accepts Medicare assignment.
Does Dr. Jaroslaw P. Siwik offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Siwik as offering telehealth services.
How many Medicare patients does Dr. Jaroslaw P. Siwik see?
CMS counts 190 Medicare patients who saw Dr. Siwik in 2024, with an average age of 76.
Show 5 more questionsShow fewer questions
What services does Dr. Jaroslaw P. Siwik bill to Medicare?
In 2024, Dr. Siwik's most billed Medicare services were office visit, established patient (99214), medicare service (G2211) and medicare service (G0439).
Where did Dr. Jaroslaw P. Siwik go to medical school?
Dr. Siwik graduated from Wayne State University School of Medicine in 1997.
What drugs does Dr. Jaroslaw P. Siwik prescribe most?
In 2024 Medicare Part D data, Dr. Siwik's most prescribed drugs by claims were Atorvastatin Calcium, Levothyroxine Sodium and Amlodipine Besylate.
Has Dr. Jaroslaw P. Siwik received payments from drug or device companies?
CMS Open Payments shows $1,788 in general payments to Dr. Siwik from 27 companies from 2016 to 2024. The largest total came from Novo Nordisk Inc.
How long has Dr. Jaroslaw P. Siwik been practicing?
Dr. Siwik graduated from medical school in 1997, 29 years ago.
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