Jan Wiacek, MD
NPI 1548263130 · Family Medicine Physician · Chicago, IL
Jan Wiacek, MD is a Family Medicine Physician provider in Chicago, IL (NPI 1548263130).
Provider details
- NPI number
- 1548263130
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036088918 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
21 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 1 distinct drug on file.
| Drug | Part D claims (2024) |
|---|---|
| Famotidine | 13 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-05-27
- Last updated
- 2012-10-23
Frequently asked questions
- What is Jan Wiacek's NPI number?
- Jan Wiacek's National Provider Identifier (NPI) is 1548263130, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jan Wiacek's specialty?
- Jan Wiacek is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Jan Wiacek located?
- Jan Wiacek's practice location on file with NPPES is 3204 N Oak Park Ave, Chicago, IL 60634-4640.
- What is Jan Wiacek's phone number?
- The practice phone number listed in the NPPES registry for Jan Wiacek is (773) 736-3131.
- Is Jan Wiacek's NPI active?
- Yes — Jan Wiacek's NPI (1548263130) is active in the NPPES registry as of the last update on 2012-10-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.