Bao-Thu Nguyen, M.D.
NPI 1538137666 · Ophthalmology Physician · Long Beach, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Bao-Thu Nguyen, M.D. is a Ophthalmology Physician provider in Long Beach, CA (NPI 1538137666).
Provider details
- NPI number
- 1538137666
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- A62609 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
5 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
4,904 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 | 1,202 | $99 |
| Photography of the Retina92250 | 981 | $41 |
| Exam of Visual Field With Extended Testing92083 | 608 | $72 |
| Imaging of Optic Nerve92133 | 540 | $37 |
| Established Patient Complete Exam of Visual System92014 | 334 | $140 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 158 | $139 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 44 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 897 | 279 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 620 | 179 |
| Bimatoprostbrand: Lumigan | 507 | 160 |
| Latanoprostene Bunodbrand: Vyzulta | 478 | 144 |
| Brinzolamide/Brimonidine Tartbrand: Simbrinza | 324 | 82 |
| Moxifloxacin Hclbrand: Moxifloxacin | 280 | 160 |
| Cyclosporinebrand: Restasis |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$3,567 across 129 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
Additional practice locations (4)
- 14726 Ramona Ave Ste 290Chino, CA 91710-5730Phone: (714) 771-1213Fax: (714) 771-7126
- 15825 Laguna Canyon Rd Ste 201Irvine, CA 92618-2127Phone: (949) 453-4661Fax: (714) 771-7126
- 360 San Miguel Dr Ste 307Newport Beach, CA 92660-7829Phone: (949) 721-0800Fax: (714) 771-7126
- 363 S Main St Ste 325Orange, CA 92868-3833Phone: (714) 771-1213Fax: (714) 771-7126
Registry dates
- Enumerated
- 2006-03-14
- Last updated
- 2024-02-27
- Certified
- 2024-02-27
Frequently asked questions
- What is Bao-Thu Nguyen's NPI number?
- Bao-Thu Nguyen's National Provider Identifier (NPI) is 1538137666, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Bao-Thu Nguyen's specialty?
- Bao-Thu Nguyen is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Bao-Thu Nguyen located?
- Bao-Thu Nguyen's practice location on file with NPPES is 4300 Long Beach Blvd Ste 400, Long Beach, CA 90807-2008.
- What is Bao-Thu Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Bao-Thu Nguyen is (562) 591-7700.
- Does Bao-Thu Nguyen accept Medicare?
- Bao-Thu Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Bao-Thu Nguyen's NPI active?
- Yes — Bao-Thu Nguyen's NPI (1538137666) is active in the NPPES registry as of the last update on 2024-02-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.