Zachary Gaertner, MD, PHD
NPI 1326594193 · Internal Medicine Physician · Chicago, IL
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Zachary Gaertner, MD, PHD is a Internal Medicine Physician provider in Chicago, IL (NPI 1326594193).
Provider details
- NPI number
- 1326594193
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- No
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
9 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 240 E Huron StSuite 1-200Chicago, IL 60611-2909Phone: (312) 503-7975
Registry dates
- Enumerated
- 2016-08-31
- Last updated
- 2025-06-18
- Certified
- 2025-06-18
Frequently asked questions
- What is Zachary Gaertner's NPI number?
- Zachary Gaertner's National Provider Identifier (NPI) is 1326594193, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Zachary Gaertner's specialty?
- Zachary Gaertner is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Zachary Gaertner located?
- Zachary Gaertner's practice location on file with NPPES is 251 E Huron St, Chicago, IL 60611-3055.
- What is Zachary Gaertner's phone number?
- The practice phone number listed in the NPPES registry for Zachary Gaertner is (312) 926-2000.
- Does Zachary Gaertner accept Medicare?
- Zachary Gaertner is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Zachary Gaertner's NPI active?
- Yes — Zachary Gaertner's NPI (1326594193) is active in the NPPES registry as of the last update on 2025-06-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.