Leah Ustas, M.D.
NPI 1033328869 · Psychiatry Physician · Oak Lawn, IL
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Leah Ustas, M.D. is a Psychiatry Physician provider in Oak Lawn, IL (NPI 1033328869).
Provider details
- NPI number
- 1033328869
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 036.122642 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 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
169 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) |
|---|---|---|
| Psychiatric Diagnostic Evaluation With Medical Services90792 | 74 | $170 |
| Psychiatric Diagnostic Evaluation With Medical Services90792 | 54 | $169 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 24 | $121 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 17 | $122 |
Typical Medicare-allowed amounts for these services range $121–$170 (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
Registry dates
- Enumerated
- 2007-05-21
- Last updated
- 2022-05-12
- Certified
- 2022-05-12
Frequently asked questions
- What is Leah Ustas's NPI number?
- Leah Ustas's National Provider Identifier (NPI) is 1033328869, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leah Ustas's specialty?
- Leah Ustas is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Leah Ustas located?
- Leah Ustas's practice location on file with NPPES is 4440 W 95th St, Oak Lawn, IL 60453-2600.
- What is Leah Ustas's phone number?
- The practice phone number listed in the NPPES registry for Leah Ustas is (708) 684-7482.
- Does Leah Ustas accept Medicare?
- Leah Ustas is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Leah Ustas's NPI active?
- Yes — Leah Ustas's NPI (1033328869) is active in the NPPES registry as of the last update on 2022-05-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.