Gayathri Sadashiva Naik, M.D.
Internal Medicine Physician · Irvine, CA
Gayathri Sadashiva Naik, M.D. is an internal medicine physician with a practice address in Irvine, California, and NPI 1912215351, issued on Sep 20, 2010. Check the license (California A123231, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gayathri Sadashiva Naik
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A123231 CA
Self-reported in NPPES; status is on the state search - Practice location
- 16300 Sand Canyon Ave, Irvine, CA 92618
- Phone
- (949) 791-3101
- Enumerated
- Sep 20, 2010
- Record last updated
- Jan 13, 2023
- Fax
- (949) 791-3112
- Medicare enrollment
- Enrolled (PECOS I20121212000234); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 16300 Sand Canyon Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Gayathri Sadashiva Naik in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A123231Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Most of these Medicare Part D claims are vaccines, 62% of the cost of the top drugs
309 Medicare Part D claims for 203 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
Pharmacies often give vaccines under a standing order that names one clinician, and CMS counts every such claim under that clinician's NPI. These claims are therefore not a measure of this clinician's own prescribing.
- Albuterol Sulfate Hfa16 claims
- Amoxicillin-Clavulanate Potass13 claims
- Doxycycline Monohydrate13 claims
- Nitrofurantoin Mono-Macro12 claims
- Prednisone12 claims
- Abrysvo11 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
- Southern California Permanente Medical GroupGarden Grove, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gayathri Sadashiva Naik among 17,696 internal medicine physician records in California
Gayathri Sadashiva Naik, M.D. is one of 17,696 internal medicine 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 2010, is newer than 63% of them.
- NPI issued2010 · 63% of these records are older, 34% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1999 · median 2004 among the 11,065 with a school on file
- Record last updated2023 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
155 internal medicine physician records list a practice address in Irvine
They are 155 of the 7,778 NPPES records with a practice address in Irvine, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Irvine → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Savitha Bharadwaj, M.D.Irvine, CA 926181760470926
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- Kambiz Karimi, M.D.Irvine, CA 926181184688475
- Sara Kim, M.D.Irvine, CA 926181912944166
- Brian Lo, MDIrvine, CA 926181073501565
- Emad Mikhail, MDIrvine, CA 926181376582957
Common questions
What is Gayathri Sadashiva Naik, M.D.'s NPI number?
Gayathri Sadashiva Naik, M.D.'s National Provider Identifier (NPI) is 1912215351, issued on Sep 20, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Gayathri Sadashiva Naik, M.D. located?
The NPPES record lists a practice address at 16300 Sand Canyon Ave, Irvine, CA, 92618. Phone: (949) 791-3101. Providers update this record themselves, so call before visiting.
How can I verify Gayathri Sadashiva Naik, M.D.'s license?
NPPES lists California license number A123231, 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 Gayathri Sadashiva Naik, M.D. prescribe under Medicare Part D?
In 2024, Gayathri Sadashiva Naik, M.D. had 309 Medicare Part D claims for 203 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.