Ling Yen, OD OPTOMETRIST
NPI 1972520518 · Optometrist · Mission Viejo, CA
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ling Yen, OD OPTOMETRIST is a Optometrist provider in Mission Viejo, CA (NPI 1972520518).
Provider details
- NPI number
- 1972520518
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- OD OPTOMETRIST
- Sex
- Female
- Sole proprietor
- No
- License
- 12187T (CA)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$249 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-17
- Last updated
- 2023-06-08
- Certified
- 2023-06-08
Frequently asked questions
- What is Ling Yen's NPI number?
- Ling Yen's National Provider Identifier (NPI) is 1972520518, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ling Yen's specialty?
- Ling Yen is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Ling Yen located?
- Ling Yen's practice location on file with NPPES is 23781 Maquina, Mission Viejo, CA 92691-2765.
- What is Ling Yen's phone number?
- The practice phone number listed in the NPPES registry for Ling Yen is (888) 988-2800.
- Does Ling Yen accept Medicare?
- Ling Yen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ling Yen's NPI active?
- Yes — Ling Yen's NPI (1972520518) is active in the NPPES registry as of the last update on 2023-06-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.