Jennah Siwak, M.D.
NPI 1205220597 · Family Medicine Physician · Metamora, IL
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jennah Siwak, M.D. is a Family Medicine Physician provider in Metamora, IL (NPI 1205220597).
Provider details
- NPI number
- 1205220597
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 036146355 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
11 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
824 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 317 | $123 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 253 | $9 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 158 | $124 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 39 | $87 |
| Administration of Influenza Virus VaccineG0008 | 25 | $31 |
| Automated Urinalysis Test81003 | 19 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 112 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 322 | 89 |
| Levothyroxine Sodium | 281 | 70 |
| Lisinopril | 229 | 67 |
| Omeprazole | 196 | 62 |
| Losartan Potassium | 183 | 50 |
| Amlodipine Besylate | 181 | 51 |
| Simvastatin | 163 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2015-03-24
- Last updated
- 2024-11-04
- Certified
- 2024-11-04
Frequently asked questions
- What is Jennah Siwak's NPI number?
- Jennah Siwak's National Provider Identifier (NPI) is 1205220597, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jennah Siwak's specialty?
- Jennah Siwak is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Jennah Siwak located?
- Jennah Siwak's practice location on file with NPPES is 901 W Walnut St, Metamora, IL 61548-8637.
- What is Jennah Siwak's phone number?
- The practice phone number listed in the NPPES registry for Jennah Siwak is (309) 367-4144.
- Does Jennah Siwak accept Medicare?
- Jennah Siwak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jennah Siwak's NPI active?
- Yes — Jennah Siwak's NPI (1205220597) is active in the NPPES registry as of the last update on 2024-11-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.