Nicholas Zessis, MD
NPI 1558750430 · Pediatrics Physician · Chicago, IL
Nicholas Zessis, MD is a Pediatrics Physician provider in Chicago, IL (NPI 1558750430).
Provider details
- NPI number
- 1558750430
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036.148502 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 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
- 2015-01-15
- Last updated
- 2019-05-16
Frequently asked questions
- What is Nicholas Zessis's NPI number?
- Nicholas Zessis's National Provider Identifier (NPI) is 1558750430, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nicholas Zessis's specialty?
- Nicholas Zessis is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Nicholas Zessis located?
- Nicholas Zessis's practice location on file with NPPES is 225 East Chicago Avenue, Chicago, IL 60611-2605.
- What is Nicholas Zessis's phone number?
- The practice phone number listed in the NPPES registry for Nicholas Zessis is (312) 227-0078.
- Is Nicholas Zessis's NPI active?
- Yes — Nicholas Zessis's NPI (1558750430) is active in the NPPES registry as of the last update on 2019-05-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.