Doctor profile · Federal record
Dr. Jaroslaw Siwik, MD
Internal Medicine Physician (CMS: Internal Medicine) · Portage, MI
- NPI 1043280522
- Accepts Medicare
- 29 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
2600 W Centre Ave, Bronson Internal Medicine Associates
Portage, MI 490244828
(269) 324-4141
fax (269) 324-2020
Credentials & registration
- NPI registered
- January 2006 — 20 yrs on file
- Profile last updated
- November 27, 2023
- Year of graduation
- 1997 — 29 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- Michigan #4301070284
- Medicaid
- MI #4616530
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1043280522. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
420
Distinct HCPCS
4
Medicare allowed
$23,987
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 238 | 164 | $72 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 105 | 105 | $10 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 53 | 47 | $71 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 24 | 22 | $86 |
In context: peer comparison
Among 5 peers in Portage Internal Medicine Physician, average services per provider: 125. This provider delivers 3.4× the peer median.Open Payments
Industry payments received
All-time total
$221
Transactions
10
Manufacturers
8
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Lilly USA, LLC | 3 | $57.44 | |
| Inspire Medical Systems, INC. | 1 | $41.10 | |
| Merck Sharp & Dohme LLC | 1 | $30.67 | |
| Abbvie INC. | 1 | $22.40 | |
| Boehringer Ingelheim Pharmaceuticals, INC. | 1 | $19.12 | |
| Amgen INC. | 1 | $18.03 | |
| Actelion Pharmaceuticals US, INC. | 1 | $17.44 | |
| Dexcom, INC. | 1 | $14.81 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
3,792
Patients
994
Total drug cost
$76,547
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 637 | 160 | $14,098 |
| Levothyroxine Sodium | Generic | 356 | 99 | $7,466 |
| Amlodipine Besylate | Generic | 349 | 99 | $3,848 |
| Losartan Potassium | Generic | 283 | 78 | $4,803 |
| Alprazolam | Generic | 273 | 60 | $1,868 |
| Rosuvastatin Calcium | Generic | 249 | 73 | $10,630 |
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 228 | 33 | $7,121 |
| Omeprazole | Generic | 228 | 55 | $3,548 |
| Lisinopril | Generic | 220 | 64 | $3,640 |
| Hydrochlorothiazide | Generic | 181 | 50 | $1,528 |
Hospital affiliations
Frequently asked questions
What is Dr. Jaroslaw Siwik's medical specialty?
Dr. Jaroslaw Siwik practices Internal Medicine Physician in Portage, MI.
Where does Dr. Jaroslaw Siwik practice?
Dr. Jaroslaw Siwik practices at 2600 W Centre Ave, Portage, MI 490244828. Office phone: 2693244141.
What is Dr. Jaroslaw Siwik's NPI?
Dr. Jaroslaw Siwik's National Provider Identifier (NPI) is 1043280522, issued by NPPES.
Does Dr. Jaroslaw Siwik accept Medicare assignment?
Yes. Dr. Jaroslaw Siwik accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Jaroslaw Siwik commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (HCPCS G0439); Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.