Derek Mai, M.D.
NPI 1386051423 · Ophthalmology Physician · Mission Hills, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Derek Mai, M.D. is a Ophthalmology Physician provider in Mission Hills, CA (NPI 1386051423).
Provider details
- NPI number
- 1386051423
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
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
11 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
598 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 175 | $98 |
| Established Patient Complete Exam of Visual System92014 | 126 | $140 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 61 | $17 |
| Imaging of Retina92134 | 56 | $45 |
| Exam of Visual Field With Extended Testing92083 | 51 | $71 |
| Removal of Cataract With Insertion of Prosthetic Lens66984 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 19 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 920 | 283 |
| Prednisolone Acetate | 428 | 232 |
| Moxifloxacin Hclbrand: Moxifloxacin | 311 | 167 |
| Ketorolac Tromethamine | 301 | 172 |
| Neomycin/Polymyxin B/Dexamethabrand: Neomycin-Polymyxin-Dexameth | 241 | 159 |
| Timolol Maleate | 204 | 64 |
| Azelastine Hcl | 152 | 64 |
Practice location
Mailing address
Additional practice locations (2)
- 9415 Campus Point Dr # Mc0946La Jolla, CA 92093-0946Phone: (858) 534-8858Fax: (858) 822-0040
- 9415 Campus Point Dr # Mc0946La Jolla, CA 92093-0946Phone: (858) 534-8858Fax: (858) 822-0040
Registry dates
- Enumerated
- 2014-07-21
- Last updated
- 2019-10-22
Frequently asked questions
- What is Derek Mai's NPI number?
- Derek Mai's National Provider Identifier (NPI) is 1386051423, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Derek Mai's specialty?
- Derek Mai is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Derek Mai located?
- Derek Mai's practice location on file with NPPES is 11333 Sepulveda Blvd, Mission Hills, CA 91345.
- What is Derek Mai's phone number?
- The practice phone number listed in the NPPES registry for Derek Mai is (818) 869-7269.
- Does Derek Mai accept Medicare?
- Derek Mai is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Derek Mai's NPI active?
- Yes — Derek Mai's NPI (1386051423) is active in the NPPES registry as of the last update on 2019-10-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.