Ivan Guan, MD
NPI 1649850348 · Neurology Physician · Chicago, IL
Enrolled with Medicare as Order and Referring Only - Neurology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ivan Guan, MD is a Neurology Physician provider in Chicago, IL (NPI 1649850348).
Provider details
- NPI number
- 1649850348
- Entity type
- Individual
- Primary specialty
- Neurology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036.175387 (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
5 yrs in NPPES registry
- Profile completeness38% of score
100% 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)
- 550 1st AveNew York, NY 10016-6402Phone: (212) 263-5506
Registry dates
- Enumerated
- 2021-04-08
- Last updated
- 2025-06-12
- Certified
- 2025-06-12
Frequently asked questions
- What is Ivan Guan's NPI number?
- Ivan Guan's National Provider Identifier (NPI) is 1649850348, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ivan Guan's specialty?
- Ivan Guan is listed in the NPPES registry with a primary specialty of Neurology Physician (Allopathic & Osteopathic Physicians).
- Where is Ivan Guan located?
- Ivan Guan's practice location on file with NPPES is 5841 S Maryland Ave # 2030, Chicago, IL 60637-1443.
- What is Ivan Guan's phone number?
- The practice phone number listed in the NPPES registry for Ivan Guan is (773) 702-6222.
- Does Ivan Guan accept Medicare?
- Ivan Guan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ivan Guan's NPI active?
- Yes — Ivan Guan's NPI (1649850348) is active in the NPPES registry as of the last update on 2025-06-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.