John Joseph Darin, M.D.
Specialist · Westlake Village, CA
John Joseph Darin, M.D. is a specialist with a practice address in Westlake Village, California, and NPI 1902801764, issued on Jun 17, 2005. Check the license (California C29520, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- John Joseph Darin
- Credential
- M.D.
- Primary taxonomy
- Specialist 174400000X
- License number
- C29520 CA
Self-reported in NPPES; status is on the state search - Practice location
- 696 Hampshire RD, Westlake Village, CA 91361
- Phone
- (818) 933-6902
- Enumerated
- Jun 17, 2005
- Record last updated
- Mar 12, 2013 (not updated in 13 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20070524000734); accepts Medicare assignment
- Medical or professional school
- University Of Michigan Medical School, 1966
- Entity
- Type 1 · individual
8 nearest specialist records → All 5,749 in California → Look up another NPI →
Also registered at 696 Hampshire RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John Joseph Darin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license C29520Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
75% fewer Medicare Part D claims than the average specialist in 2024
350 Medicare Part D claims for 121 beneficiaries, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D. Brand-name drugs were 47% of claims.
Most prescribed
- Latanoprost78 claims
- Timolol Maleate42 claims
- Tobramycin-Dexamethasone32 claims
- Lumigan25 claims
- Brimonidine Tartrate22 claims
- Brinzolamide14 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: $50.64
2 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 5,844 providers of this specialty with any payment received $4,760.79 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
- Darin Eye Center A MedicalThousand Oaks, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Joseph Darin among 5,749 specialist records in California
John Joseph Darin, M.D. is one of 5,749 specialist records with a practice address in California. 30% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 93% newer
- In a Medicare fileYes · 30% of these records are
- In the CMS Doctors and Clinicians fileYes · 19% of these records are
- Graduated1966 · median 1989 among the 1,075 with a school on file
- Record last updated2013 · 77% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
17 specialist records list a practice address in Westlake Village
They are 17 of the 1,397 NPPES records with a practice address in Westlake Village, and 5,749 specialist records in California.
All 5,749 in California → Every provider in Westlake Village → Specialist nationwide →
The 8 specialist records with the nearest ZIP codes
- Neeta Ambe-Crain, M.D.Westlake Village, CA 913611093832255
- Michael Bastien, MDWestlake Village, CA 913611053371096
- Randolph Capri, MDWestlake Village, CA 913611750340345
- Gary Carlson, MDWestlake Village, CA 913611144280181
- Glenn Cohen, M.D.Westlake Village, CA 913611881755056
- Kenneth Diddie, M.D.Westlake Village, CA 913611184684219
- Rosemary Flores, M.D.Thousand Oaks, CA 913611871593095
- Robert Ghaussy, M.D.Thousand Oaks, CA 913611053311274
Common questions
What is John Joseph Darin, M.D.'s NPI number?
John Joseph Darin, M.D.'s National Provider Identifier (NPI) is 1902801764, issued on Jun 17, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John Joseph Darin, M.D. located?
The NPPES record lists a practice address at 696 Hampshire RD, Westlake Village, CA, 91361. Phone: (818) 933-6902. Providers update this record themselves, so call before visiting.
How can I verify John Joseph Darin, M.D.'s license?
NPPES lists California license number C29520, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does John Joseph Darin, M.D. prescribe under Medicare Part D?
In 2024, John Joseph Darin, M.D. had 350 Medicare Part D claims for 121 beneficiaries; the average among specialist prescribers was 1,380. 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.