Olesia Shalayska
NPI 1558816371 · Clinical Psychologist · Warrenville, IL
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Olesia Shalayska is a Clinical Psychologist provider in Warrenville, IL (NPI 1558816371).
Provider details
- NPI number
- 1558816371
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Sex
- Female
- Sole proprietor
- No
- License
- 20042972A (IN)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
9 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
214 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) |
|---|---|---|
| Psychotherapy, 45 Minutes90834 | 178 | $104 |
| Psychotherapy, 30 Minutes90832 | 36 | $79 |
Typical Medicare-allowed amounts for these services range $79–$104 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (1)
- 7110 W 127th St Ste 150Palos Heights, IL 60463-1579Phone: (630) 686-8875Fax: (630) 686-5445
Registry dates
- Enumerated
- 2016-08-22
- Last updated
- 2026-04-07
- Certified
- 2026-04-07
Frequently asked questions
- What is Olesia Shalayska's NPI number?
- Olesia Shalayska's National Provider Identifier (NPI) is 1558816371, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Olesia Shalayska's specialty?
- Olesia Shalayska is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Olesia Shalayska located?
- Olesia Shalayska's practice location on file with NPPES is 4320 Winfield Rd Ste 200, Warrenville, IL 60555-4023.
- What is Olesia Shalayska's phone number?
- The practice phone number listed in the NPPES registry for Olesia Shalayska is (630) 686-8875.
- Does Olesia Shalayska accept Medicare?
- Olesia Shalayska is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Olesia Shalayska's NPI active?
- Yes — Olesia Shalayska's NPI (1558816371) is active in the NPPES registry as of the last update on 2026-04-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.