Linh Nguyen
NPI 1659900991 · Optometrist · Long Beach, CA
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Linh Nguyen is a Optometrist provider in Long Beach, CA (NPI 1659900991).
Provider details
- NPI number
- 1659900991
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Sex
- Female
- Sole proprietor
- No
- License
- 34594 (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 tenure38% of score
6 yrs in NPPES registry
- Profile completeness38% of score
100% 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 1 distinct drug on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Erythromycin Basebrand: Erythromycin | 24 | 23 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-04-08
- Last updated
- 2021-12-29
- Certified
- 2021-07-14
Frequently asked questions
- What is Linh Nguyen's NPI number?
- Linh Nguyen's National Provider Identifier (NPI) is 1659900991, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Linh Nguyen's specialty?
- Linh Nguyen is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Linh Nguyen located?
- Linh Nguyen's practice location on file with NPPES is 5901 E 7th St, Long Beach, CA 90822-5201.
- What is Linh Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Linh Nguyen is (844) 808-2020.
- Does Linh Nguyen accept Medicare?
- Linh Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Linh Nguyen's NPI active?
- Yes — Linh Nguyen's NPI (1659900991) is active in the NPPES registry as of the last update on 2021-12-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.