Zachary Marcus, MD
NPI 1649624644 · Pediatrics Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Zachary Marcus, MD is a Pediatrics Physician provider in Chicago, IL (NPI 1649624644).
Provider details
- NPI number
- 1649624644
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036147138 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
10 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
- 2016-04-16
- Last updated
- 2021-09-24
- Certified
- 2021-09-09
Frequently asked questions
- What is Zachary Marcus's NPI number?
- Zachary Marcus's National Provider Identifier (NPI) is 1649624644, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Zachary Marcus's specialty?
- Zachary Marcus is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Zachary Marcus located?
- Zachary Marcus's practice location on file with NPPES is 840 E 59th St, Chicago, IL 60637.
- What is Zachary Marcus's phone number?
- The practice phone number listed in the NPPES registry for Zachary Marcus is (773) 834-9355.
- Does Zachary Marcus accept Medicare?
- Zachary Marcus is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Zachary Marcus's NPI active?
- Yes — Zachary Marcus's NPI (1649624644) is active in the NPPES registry as of the last update on 2021-09-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.