Tiffany Zelek, LCSW
NPI 1447927579 · Clinical Social Worker · Chicago, IL
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tiffany Zelek, LCSW is a Clinical Social Worker provider in Chicago, IL (NPI 1447927579).
Provider details
- NPI number
- 1447927579
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- No
- License
- 150.103622 (IL)
Specialties & taxonomies
Behavioral Health & Social Service Providers
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
4 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,044 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 | 455 | $78 |
| Psychiatric Services Complicated By Communication Factor90785 | 277 | $11 |
| Group Psychotherapy90853 | 146 | $21 |
| Psychotherapy, 1 Hour90837 | 120 | $116 |
| Psychotherapy, 30 Minutes90832 | 35 | $59 |
| Psychiatric Diagnostic Evaluation90791 | 11 | $130 |
Typical Medicare-allowed amounts for these services range $11–$130 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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
Registry dates
- Enumerated
- 2021-08-26
- Last updated
- 2023-09-27
- Certified
- 2023-08-15
Frequently asked questions
- What is Tiffany Zelek's NPI number?
- Tiffany Zelek's National Provider Identifier (NPI) is 1447927579, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tiffany Zelek's specialty?
- Tiffany Zelek is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Tiffany Zelek located?
- Tiffany Zelek's practice location on file with NPPES is 333 N Michigan Ave Ste 1400, Chicago, IL 60601-4011.
- What is Tiffany Zelek's phone number?
- The practice phone number listed in the NPPES registry for Tiffany Zelek is (708) 573-2962.
- Does Tiffany Zelek accept Medicare?
- Tiffany Zelek is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tiffany Zelek's NPI active?
- Yes — Tiffany Zelek's NPI (1447927579) is active in the NPPES registry as of the last update on 2023-09-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.