Rosalynn Nguyen-Strongin, O.D.
NPI 1619164175 · Optometrist · Loma Linda, CA
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Rosalynn Nguyen-Strongin, O.D. is a Optometrist provider in Loma Linda, CA (NPI 1619164175).
Provider details
- NPI number
- 1619164175
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- O.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 13320TPA (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 tenure25% of score
18 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
593 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 291 | $93 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 97 | $115 |
| Imaging of Optic Nerve92133 | 68 | $37 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 50 | $59 |
| Exam of Visual Field With Extended Testing92083 | 41 | $66 |
| Imaging of Retina92134 | 18 | $41 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 513 | 152 |
| Timolol Maleate | 143 | 45 |
| Cyclosporinebrand: Restasis | 107 | 59 |
| Cyclosporine | 92 | 34 |
| Brimonidine Tartrate | 71 | 22 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 61 | 22 |
| Azelastine Hcl | 35 | 11 |
| Neomycin/Polymyxin B/Dexametha |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$73 across 4 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
- 2007-09-28
- Last updated
- 2015-01-27
Frequently asked questions
- What is Rosalynn Nguyen-Strongin's NPI number?
- Rosalynn Nguyen-Strongin's National Provider Identifier (NPI) is 1619164175, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Rosalynn Nguyen-Strongin's specialty?
- Rosalynn Nguyen-Strongin is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Rosalynn Nguyen-Strongin located?
- Rosalynn Nguyen-Strongin's practice location on file with NPPES is 11370 Anderson St Ste 1800, Loma Linda, CA 92350-1715.
- What is Rosalynn Nguyen-Strongin's phone number?
- The practice phone number listed in the NPPES registry for Rosalynn Nguyen-Strongin is (909) 558-2154.
- Does Rosalynn Nguyen-Strongin accept Medicare?
- Rosalynn Nguyen-Strongin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Rosalynn Nguyen-Strongin's NPI active?
- Yes — Rosalynn Nguyen-Strongin's NPI (1619164175) is active in the NPPES registry as of the last update on 2015-01-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.