Gabriel Si, MD
NPI 1689204810 · Internal Medicine Physician · Evanston, IL
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gabriel Si, MD is a Internal Medicine Physician provider in Evanston, IL (NPI 1689204810).
Provider details
- NPI number
- 1689204810
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
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
6 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)
- 2160 S 1st AveMaywood, IL 60153-3328Phone: (708) 216-3229
Registry dates
- Enumerated
- 2020-01-15
- Last updated
- 2021-04-28
- Certified
- 2021-04-28
Frequently asked questions
- What is Gabriel Si's NPI number?
- Gabriel Si's National Provider Identifier (NPI) is 1689204810, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gabriel Si's specialty?
- Gabriel Si is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gabriel Si located?
- Gabriel Si's practice location on file with NPPES is 2650 Ridge Ave Ste 1304, Evanston, IL 60201-1700.
- What is Gabriel Si's phone number?
- The practice phone number listed in the NPPES registry for Gabriel Si is (847) 475-4555.
- Does Gabriel Si accept Medicare?
- Gabriel Si is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gabriel Si's NPI active?
- Yes — Gabriel Si's NPI (1689204810) is active in the NPPES registry as of the last update on 2021-04-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.