An Huynh, M.D.
NPI 1770844391 · Ophthalmology Physician · Loma Linda, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
An Huynh, M.D. is a Ophthalmology Physician provider in Loma Linda, CA (NPI 1770844391).
Provider details
- NPI number
- 1770844391
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- DR.0066664 (CO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
14 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
28 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 17 | $62 |
| Imaging of Retina With Remote Review By Clinical Staff92227 | 11 | $21 |
Typical Medicare-allowed amounts for these services range $21–$62 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisolone Acetate | 183 | 122 |
| Latanoprost | 138 | 41 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 103 | 50 |
| Cyclosporine | 101 | 26 |
| Brimonidine Tartrate | 66 | 28 |
| Ofloxacin | 53 | 42 |
| Ketorolac Tromethamine | 47 | 39 |
| Timolol Maleate | 31 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-05-30
- Last updated
- 2022-04-27
- Certified
- 2022-04-27
Frequently asked questions
- What is An Huynh's NPI number?
- An Huynh's National Provider Identifier (NPI) is 1770844391, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is An Huynh's specialty?
- An Huynh is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is An Huynh located?
- An Huynh's practice location on file with NPPES is 11234 Anderson St, Loma Linda, CA 92354-2804.
- What is An Huynh's phone number?
- The practice phone number listed in the NPPES registry for An Huynh is (909) 558-2154.
- Does An Huynh accept Medicare?
- An Huynh is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is An Huynh's NPI active?
- Yes — An Huynh's NPI (1770844391) is active in the NPPES registry as of the last update on 2022-04-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.