Trevar Ziemer, MD
NPI 1689376345 · Psychiatry Physician · Chicago, IL
Enrolled with Medicare as Order and Referring Only - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Trevar Ziemer, MD is a Psychiatry Physician provider in Chicago, IL (NPI 1689376345).
Provider details
- NPI number
- 1689376345
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036176965 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
3 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
- 2023-03-20
- Last updated
- 2025-12-04
- Certified
- 2025-12-04
Frequently asked questions
- What is Trevar Ziemer's NPI number?
- Trevar Ziemer's National Provider Identifier (NPI) is 1689376345, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Trevar Ziemer's specialty?
- Trevar Ziemer is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Trevar Ziemer located?
- Trevar Ziemer's practice location on file with NPPES is 251 E Huron St, Chicago, IL 60611-2908.
- What is Trevar Ziemer's phone number?
- The practice phone number listed in the NPPES registry for Trevar Ziemer is (312) 926-2000.
- Does Trevar Ziemer accept Medicare?
- Trevar Ziemer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Trevar Ziemer's NPI active?
- Yes — Trevar Ziemer's NPI (1689376345) is active in the NPPES registry as of the last update on 2025-12-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.