Stephen Sladek, M.D.
NPI 1770562563 · Family Medicine Physician · Oak Lawn, IL
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Sladek, M.D. is a Family Medicine Physician provider in Oak Lawn, IL (NPI 1770562563).
Provider details
- NPI number
- 1770562563
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 036133124 (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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-01-11
- Last updated
- 2021-12-13
- Certified
- 2021-12-13
Frequently asked questions
- What is Stephen Sladek's NPI number?
- Stephen Sladek's National Provider Identifier (NPI) is 1770562563, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Sladek's specialty?
- Stephen Sladek is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Sladek located?
- Stephen Sladek's practice location on file with NPPES is 9555 S 52nd Ave, Oak Lawn, IL 60453-3054.
- What is Stephen Sladek's phone number?
- The practice phone number listed in the NPPES registry for Stephen Sladek is (708) 422-5700.
- Does Stephen Sladek accept Medicare?
- Stephen Sladek is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Sladek's NPI active?
- Yes — Stephen Sladek's NPI (1770562563) is active in the NPPES registry as of the last update on 2021-12-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.