Catherine Tan
NPI 1518429422 · Obstetrics & Gynecology Physician · Barrington, IL
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Catherine Tan is a Obstetrics & Gynecology Physician provider in Barrington, IL (NPI 1518429422).
Provider details
- NPI number
- 1518429422
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- No
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
7 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)
- 836 W Wellington AveChicago, IL 60657-5147Phone: (773) 975-1600
Registry dates
- Enumerated
- 2019-04-01
- Last updated
- 2023-09-19
- Certified
- 2023-09-19
Frequently asked questions
- What is Catherine Tan's NPI number?
- Catherine Tan's National Provider Identifier (NPI) is 1518429422, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Catherine Tan's specialty?
- Catherine Tan is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Catherine Tan located?
- Catherine Tan's practice location on file with NPPES is 27790 W Highway 22 Ste 36, Barrington, IL 60010-2396.
- What is Catherine Tan's phone number?
- The practice phone number listed in the NPPES registry for Catherine Tan is (847) 381-8181.
- Does Catherine Tan accept Medicare?
- Catherine Tan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Catherine Tan's NPI active?
- Yes — Catherine Tan's NPI (1518429422) is active in the NPPES registry as of the last update on 2023-09-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.