IndividualActive
Sydney Mesker
NPI 1871454090 · Professional Counselor · Oak Park, IL
Sydney Mesker is a Professional Counselor provider in Oak Park, IL (NPI 1871454090).
Provider details
- NPI number
- 1871454090
- Entity type
- Individual
- Primary specialty
- Professional CounselorBehavioral Health & Social Service Providers
- Sex
- Female
- Sole proprietor
- No
- License
- 178.021993 (IL)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Established profile(53/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
Under 1 yr in 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
1010 Lake St Ste 500
Oak Park, IL 60301-1135
Phone: (773) 665-8052
Street-level locationGet directions
Mailing address
10101 S Peoria St
Chicago, IL 60643-2224
Registry dates
- Enumerated
- 2025-11-18
- Last updated
- 2025-11-18
- Certified
- 2025-11-18
Frequently asked questions
- What is Sydney Mesker's NPI number?
- Sydney Mesker's National Provider Identifier (NPI) is 1871454090, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sydney Mesker's specialty?
- Sydney Mesker is listed in the NPPES registry with a primary specialty of Professional Counselor (Behavioral Health & Social Service Providers).
- Where is Sydney Mesker located?
- Sydney Mesker's practice location on file with NPPES is 1010 Lake St Ste 500, Oak Park, IL 60301-1135.
- What is Sydney Mesker's phone number?
- The practice phone number listed in the NPPES registry for Sydney Mesker is (773) 665-8052.
- Is Sydney Mesker's NPI active?
- Yes — Sydney Mesker's NPI (1871454090) is active in the NPPES registry as of the last update on 2025-11-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.