Marek Walczyk, M.D.
NPI 1447243373 · Psychiatry Physician · Chicago, IL
Marek Walczyk, M.D. is a Psychiatry Physician provider in Chicago, IL (NPI 1447243373).
Provider details
- NPI number
- 1447243373
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 36107779 (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
20 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 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clonazepam | 88 | 26 |
| Duloxetine Hcl | 85 | 17 |
| Alprazolam | 52 | 14 |
| Buprenorphine Hcl/Naloxone Hclbrand: Buprenorphine-Naloxone | 52 | — |
| Trazodone Hcl | 38 | 12 |
| Zolpidem Tartrate | 38 | 13 |
| Aripiprazole |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-08-25
- Last updated
- 2009-01-20
Frequently asked questions
- What is Marek Walczyk's NPI number?
- Marek Walczyk's National Provider Identifier (NPI) is 1447243373, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marek Walczyk's specialty?
- Marek Walczyk is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Marek Walczyk located?
- Marek Walczyk's practice location on file with NPPES is 5519 N. Cumberland Ave., Chicago, IL 60656-0000.
- What is Marek Walczyk's phone number?
- The practice phone number listed in the NPPES registry for Marek Walczyk is (708) 224-8840.
- Is Marek Walczyk's NPI active?
- Yes — Marek Walczyk's NPI (1447243373) is active in the NPPES registry as of the last update on 2009-01-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.