Alan Nakanishi, M.D.
NPI 1770690505 · Ophthalmology Physician · Stockton, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alan Nakanishi, M.D. is a Ophthalmology Physician provider in Stockton, CA (NPI 1770690505).
Provider details
- NPI number
- 1770690505
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G012131 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 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
773 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 | 187 | $93 |
| Established Patient Complete Exam of Visual System92014 | 152 | $130 |
| Photography of the Retina92250 | 139 | $38 |
| Imaging of Retina92134 | 133 | $42 |
| New Patient Complete Exam of Visual System92004 | 59 | $151 |
| Established Patient Problem Focused Exam of Visual System92012 | 32 | $93 |
| Imaging of Optic Nerve |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 279 | 86 |
| Brimonidine Tartrate | 63 | 19 |
| Erythromycin Basebrand: Erythromycin | 43 | 42 |
| Timolol Maleate | 30 | 11 |
| Bimatoprostbrand: Lumigan | 28 | — |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 19 | — |
| Brimonidine Tartratebrand: Alphagan P | 18 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-25
- Last updated
- 2008-06-03
Frequently asked questions
- What is Alan Nakanishi's NPI number?
- Alan Nakanishi's National Provider Identifier (NPI) is 1770690505, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alan Nakanishi's specialty?
- Alan Nakanishi is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Alan Nakanishi located?
- Alan Nakanishi's practice location on file with NPPES is 1617 Saint Marks Plz, Stockton, CA 95207-6423.
- What is Alan Nakanishi's phone number?
- The practice phone number listed in the NPPES registry for Alan Nakanishi is (209) 478-1797.
- Does Alan Nakanishi accept Medicare?
- Alan Nakanishi is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alan Nakanishi's NPI active?
- Yes — Alan Nakanishi's NPI (1770690505) is active in the NPPES registry as of the last update on 2008-06-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.