Alexander Koo, MD
NPI 1891438180 · Student in an Organized Health Care Education/Training Program · Chicago, IL
Enrolled with Medicare as Order and Referring Only - Orthopedic Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alexander Koo, MD is a Student in an Organized Health Care Education/Training Program provider in Chicago, IL (NPI 1891438180).
Provider details
- NPI number
- 1891438180
- Entity type
- Individual
- Primary specialty
- Student in an Organized Health Care Education/Training ProgramStudent, Health Care
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
4 yrs in NPPES registry
- Profile completeness38% of score
83% 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
- 2022-04-15
- Last updated
- 2023-06-14
- Certified
- 2023-06-14
Frequently asked questions
- What is Alexander Koo's NPI number?
- Alexander Koo's National Provider Identifier (NPI) is 1891438180, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alexander Koo's specialty?
- Alexander Koo is listed in the NPPES registry with a primary specialty of Student in an Organized Health Care Education/Training Program (Student, Health Care).
- Where is Alexander Koo located?
- Alexander Koo's practice location on file with NPPES is 5841 S Maryland Ave # Mc3079, Chicago, IL 60637-1443.
- What is Alexander Koo's phone number?
- The practice phone number listed in the NPPES registry for Alexander Koo is (773) 834-3531.
- Does Alexander Koo accept Medicare?
- Alexander Koo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alexander Koo's NPI active?
- Yes — Alexander Koo's NPI (1891438180) is active in the NPPES registry as of the last update on 2023-06-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.