Diana Reiko Shiba, M.D.
Ophthalmology Physician · La Jolla, CA
Diana Reiko Shiba, M.D. is an ophthalmology physician with a practice address in La Jolla, California, and NPI 1356557888, issued on May 14, 2007. Check the license (California A99649, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Diana Reiko Shiba
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- A99649 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9415 Campus Point Dr # 257, La Jolla, CA 92093
- Phone
- (858) 336-2938
- Enumerated
- May 14, 2007
- Record last updated
- Dec 6, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20090925000580); accepts Medicare assignment
- Medical or professional school
- University Of California, Davis School Of Medicine, 2005
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 2,899 in California → Look up another NPI →
Also registered at 9415 Campus Point Dr # 257
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Usha Kumar, M.D.Internal Medicine Physician1811263833
Verify Diana Reiko Shiba in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A99649Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
50% fewer Medicare Part D claims than the average ophthalmology physician in 2024
764 Medicare Part D claims for 225 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims.
Most prescribed
- Latanoprost196 claims
- Prednisolone Acetate169 claims
- Polymyxin B Sul-Trimethoprim123 claims
- Ketorolac Tromethamine76 claims
- Timolol Maleate53 claims
- Dorzolamide-Timolol51 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $172.76
2 payments; by number, the most common kind was food and beverage; the largest payer was Genentech, Inc. The 13,221 providers of this specialty with any payment received $4,535.02 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Diana Reiko Shiba among 2,899 ophthalmology physician records in California
Diana Reiko Shiba, M.D. is one of 2,899 ophthalmology physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 55% of them.
- NPI issued2007 · 55% of these records are older, 33% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2005 · median 2001 among the 1,907 with a school on file
- Record last updated2021 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
51 ophthalmology physician records list a practice address in La Jolla
They are 51 of the 3,648 NPPES records with a practice address in La Jolla, and 2,899 ophthalmology physician records in California.
All 2,899 in California → Every provider in La Jolla → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Natalie Afshari, M.D.La Jolla, CA 920931538126735
- Mathieu Bakhoum, M.D., PH.D.La Jolla, CA 920931114347085
- Brenda Breidenstein, MDLa Jolla, CA 920931518118124
- Tomas Grippo, M.D.La Jolla, CA 920931104010164
- Weldon Haw, M.D.La Jolla, CA 920931710945357
- Don Kikkawa, M.D.La Jolla, CA 920931932202371
- Bobby Korn, M.D.La Jolla, CA 920931174551006
- Eric Leung, M.D.La Jolla, CA 920931083886857
Common questions
What is Diana Reiko Shiba, M.D.'s NPI number?
Diana Reiko Shiba, M.D.'s National Provider Identifier (NPI) is 1356557888, issued on May 14, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Diana Reiko Shiba, M.D. located?
The NPPES record lists a practice address at 9415 Campus Point Dr # 257, La Jolla, CA, 92093. Phone: (858) 336-2938. Providers update this record themselves, so call before visiting.
How can I verify Diana Reiko Shiba, M.D.'s license?
NPPES lists California license number A99649, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Diana Reiko Shiba, M.D. prescribe under Medicare Part D?
In 2024, Diana Reiko Shiba, M.D. had 764 Medicare Part D claims for 225 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.