ALAN S NAKANISHI M.D.
NPI 1770690505
Ophthalmology in Stockton, CA
About Alan S Nakanishi M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALAN S NAKANISHI M.D. (NPI 1770690505) is an individual ophthalmology provider in Stockton, California, licensed in California (G012131) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and is a graduate of Loma Linda University School Of Medicine (1965).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Alan S Nakanishi M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Alan Nakanishi reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Stockton, CA 95207
- Reassigned Medicare billing, California enrollment
- 13 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 9
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 95207 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 6
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
STOCKTON, CA 95207
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Alan Nakanishi's NPI number?
The NPI number for Alan Nakanishi is 1770690505. It was assigned to this individual provider in the NPPES registry on August 25, 2006.
Where is Alan Nakanishi located?
Alan Nakanishi practices at 1617 Saint Marks Plz Suite D, Stockton, CA 95207. The listed phone number is (209) 478-1797.
What is Alan Nakanishi's specialty?
The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.
Is Alan Nakanishi enrolled in Medicare?
Yes. Alan Nakanishi is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Alan Nakanishi's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alan Nakanishi reassigns Medicare benefits to Delta Eye Medical Group, Inc. (Stockton, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Alan Nakanishi's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Alan Nakanishi accept?
Health plans from Anthem Blue Cross and Blue Shield, Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma, Blue Cross and Blue Shield of Texas and Providence Health Plan list Alan Nakanishi as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Alan Nakanishi was last updated on June 3, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Alan S Nakanishi, M.D. · NPI 1770690505
Ophthalmology physician in Stockton, California. Individual provider, active in the CMS NPPES registry since August 25, 2006.
## Identity
- **NPI:** 1770690505 (Entity type: Individual)
- **Enumerated:** August 25, 2006
- **Primary specialty:** Ophthalmology · taxonomy 207W00000X
- **State license:** G012131 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1617 SAINT MARKS PLZ, SUITE D, Stockton, CA 95207-6423
- **Phone:** (209) 478-1797 · **Fax:** (209) 478-1224
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Delta Eye Medical Group, Inc. (NPI 1407964679, Stockton, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Loma Linda University School Of Medicine, class of 1965
## Record status
- **NPPES last updated:** June 3, 2008
- **Other identifiers:** Medicare UPIN A38562 (CA); Medicare PIN 00G121310 (CA); Medicaid 00G121310 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1770690505) · Data from the CMS NPPES public registry.