Zachary Tiernan, MD
NPI 1437094315 · Student in an Organized Health Care Education/Training Program · Olympia Fields, IL
Zachary Tiernan, MD is a Student in an Organized Health Care Education/Training Program provider in Olympia Fields, IL (NPI 1437094315).
Provider details
- NPI number
- 1437094315
- Entity type
- Individual
- Primary specialty
- Student in an Organized Health Care Education/Training ProgramStudent, Health Care
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Student, Health Care
Profile Score
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
83% 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
- 2026-04-20
- Last updated
- 2026-04-20
- Certified
- 2026-04-20
Frequently asked questions
- What is Zachary Tiernan's NPI number?
- Zachary Tiernan's National Provider Identifier (NPI) is 1437094315, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Zachary Tiernan's specialty?
- Zachary Tiernan is listed in the NPPES registry with a primary specialty of Student in an Organized Health Care Education/Training Program (Student, Health Care).
- Where is Zachary Tiernan located?
- Zachary Tiernan's practice location on file with NPPES is 20201 Crawford Ave, Olympia Fields, IL 60461-1010.
- What is Zachary Tiernan's phone number?
- The practice phone number listed in the NPPES registry for Zachary Tiernan is (708) 855-7021.
- Is Zachary Tiernan's NPI active?
- Yes — Zachary Tiernan's NPI (1437094315) is active in the NPPES registry as of the last update on 2026-04-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.