Quick answers
- Does Jennah Siwak accept Medicare assignment?
- Yes. Medicare's clinician data says Jennah Siwak accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Jennah Siwak see?
- In 2024, CMS data shows 244 Original Medicare patients and 1,200 services for Jennah Siwak. This counts Original Medicare only and measures volume, not quality.
- What is Jennah Siwak's NPI number?
- 1205220597. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Jennah Siwak, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 244 |
|---|---|
| Services billed to Medicare | 1,200 |
| Different services or procedures | 54 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)317 services
- Insertion of needle into vein for collection of blood sample (36415)253 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)158 services
- Injection, triamcinolone acetonide, not otherwise specified, 10 mg (J3301)140 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)39 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis39%
- Chronic kidney disease33%
- Diabetes27%
- Ischemic heart disease25%
Hospitals where Jennah Siwak works
Medicare's Facility Affiliation Data lists Jennah Siwak at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Carle Eureka HospitalEureka, IL · Critical Access Hospital · Emergency services: listed by Medicare · CCN 141309
- Carle Health Methodist HospitalPeoria, IL · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 140209
- Carle Health Pekin HospitalPekin, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140120
- Carle Health Proctor HospitalPeoria, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140013
- Saint Francis Medical CenterPeoria, IL · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 140067
Practice locations
Addresses where Jennah Siwak is enrolled with Medicare (CMS data updated October 2, 2026).
- 112 NE Crescent AvePeoria, IL 61606 (309) 672‑4670
- 1909 N Morton Ave, Methodist MortonMorton, IL 61550 (309) 263‑9124
- 5401 N Knoxville Ave, Suite 400Peoria, IL 61614 (309) 691‑6610
- 611 W Park StUrbana, IL 61801 (888) 712‑2753
- 901 W Walnut StMetamora, IL 61548 (309) 367‑4144
Group practices
Medicare enrollment lists Jennah Siwak as a member of these groups (CMS data updated October 2, 2026).
- Carle Health Care Incorporated1,666 clinicians in the group
- Methodist Medical Center of Illinois382 clinicians in the group
- Proctor Health Systems105 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Peoria
Clinicians with the same Medicare primary specialty in Peoria, IL — not a recommendation.
Other clinicians in Carle Health Care Incorporated
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Illinois Medical College |
| Graduation year | 2015 (11 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1205220597 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians