Duyen Xin, OD
NPI 1871871657 · Optometrist · Alton, IL
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Duyen Xin, OD is a Optometrist provider in Alton, IL (NPI 1871871657).
Provider details
- NPI number
- 1871871657
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- OD
- Sex
- Female
- Sole proprietor
- No
- License
- 2011020321 (MO)
Specialties & taxonomies
Eye and Vision Services Providers
Eye and Vision Services Providers
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 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)
- 211 E BroadwayAlton, IL 62002-6220Phone: (618) 462-9818Fax: (314) 741-4947
Registry dates
- Enumerated
- 2011-07-28
- Last updated
- 2018-08-16
Frequently asked questions
- What is Duyen Xin's NPI number?
- Duyen Xin's National Provider Identifier (NPI) is 1871871657, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Duyen Xin's specialty?
- Duyen Xin is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Duyen Xin located?
- Duyen Xin's practice location on file with NPPES is 211 E Broadway, Alton, IL 62002.
- What is Duyen Xin's phone number?
- The practice phone number listed in the NPPES registry for Duyen Xin is (618) 462-9818.
- Does Duyen Xin accept Medicare?
- Duyen Xin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Duyen Xin's NPI active?
- Yes — Duyen Xin's NPI (1871871657) is active in the NPPES registry as of the last update on 2018-08-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.