Jaya Karnani, MD
Family Medicine Physician · Castro Valley, CA
Jaya Karnani, MD is a family medicine physician with a practice address in Castro Valley, California, and NPI 1457309783, issued on May 5, 2006. Check the license (California A89868, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jaya Karnani
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A89868 CA
Self-reported in NPPES; status is on the state search - Practice location
- 20642 John Dr, Castro Valley, CA 94546
- Phone
- (510) 785-5000
- Enumerated
- May 5, 2006
- Record last updated
- Dec 7, 2022
- Medicare enrollment
- Enrolled (PECOS I20051215000269); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 20642 John Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Shiven Chaudhry, MDInternal Medicine Physician1528594801
- Corina Clark, P.A.Physician Assistant1720480049
- Ashley Etchison, MDDiagnostic Radiology Physician1962907840
Verify Jaya Karnani in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A89868Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
74% more Medicare Part D claims than the average family medicine physician in 2024
6,151 Medicare Part D claims for 707 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 233 claims were for opioids.
Most prescribed
- Atorvastatin Calcium368 claims
- Rosuvastatin Calcium257 claims
- Amlodipine Besylate226 claims
- Losartan Potassium212 claims
- Levothyroxine Sodium190 claims
- Gabapentin166 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.
Bills Medicare through one group practice
- University Healthcare AllianceCastro Valley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jaya Karnani among 17,133 family medicine physician records in California
Jaya Karnani, MD is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2001 · median 2005 among the 10,652 with a school on file
- Record last updated2022 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
22 family medicine physician records list a practice address in Castro Valley
They are 22 of the 999 NPPES records with a practice address in Castro Valley, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Castro Valley → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Ahmad Ayoubi, M.D., M.SCastro Valley, CA 945461992926075
- Huong Dang, MDCastro Valley, CA 945461417390071
- Elmer Jason Grande, MDCastro Valley, CA 945461235323007
- Peter Hein, MDCastro Valley, CA 945461497803282
- Bhoomika Kamath, M.D.Castro Valley, CA 945461295991354
- Genevieve King, M. D.Castro Valley, CA 945461861561243
- Christopher Moore, MDCastro Valley, CA 945461437417029
- Michael O'Brien, M.D.Castro Valley, CA 945461821181215
Common questions
What is Jaya Karnani, MD's NPI number?
Jaya Karnani, MD's National Provider Identifier (NPI) is 1457309783, issued on May 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jaya Karnani, MD located?
The NPPES record lists a practice address at 20642 John Dr, Castro Valley, CA, 94546. Phone: (510) 785-5000. Providers update this record themselves, so call before visiting.
How can I verify Jaya Karnani, MD's license?
NPPES lists California license number A89868, 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 Jaya Karnani, MD prescribe under Medicare Part D?
In 2024, Jaya Karnani, MD had 6,151 Medicare Part D claims for 707 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.