Atul T. Roy, M.D.
Nephrology Physician · Merced, CA
Atul T. Roy, M.D. is a nephrology physician with a practice address in Merced, California, and NPI 1467496505, issued on Jun 16, 2006. Check the license (California A44403, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Atul T. Roy
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- A44403 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1140 Olivewood Dr, Merced, CA 95348
- Phone
- (209) 725-2121
- Enumerated
- Jun 16, 2006
- Record last updated
- Nov 9, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (209) 725-2123
- Medicaid ID
- GR0082110 CA
- Medicare enrollment
- Enrolled (PECOS I20090615000583); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 1,468 in California → Look up another NPI →
Also registered at 1140 Olivewood Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Daniel Ikemiyashiro, M.D.Nephrology Physician1801837208
Verify Atul T. Roy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A44403Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% more Medicare Part D claims than the average nephrology physician in 2024
2,637 Medicare Part D claims for 450 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D.
Most prescribed
- Xphozah200 claims
- Losartan Potassium194 claims
- Jardiance185 claims
- Farxiga180 claims
- Amlodipine Besylate138 claims
- Prosol123 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: $369.04
15 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 8,230 providers of this specialty with any payment received $3,091.37 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
- The Nephrology Group IncMerced, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Atul T. Roy among 1,468 nephrology physician records in California
Atul T. Roy, M.D. is one of 1,468 nephrology physician records with a practice address in California. 88% 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 10% of them.
- NPI issued2006 · 10% of these records are older, 48% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated1982 · median 2001 among the 1,128 with a school on file
- Record last updated2015 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in California
There are 1,468 nephrology physician records in California.
All 1,468 in California → Every provider in Merced → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Nirmal Aujla, MDMerced, CA 953481275637506
- Harleen Aujla, M.D.Merced, CA 953481144661000
- Daniel Ikemiyashiro, M.D.Merced, CA 953481801837208
- Josephine Baisac, M.D.Modesto, CA 953501548223480
- Mark Fahlen, MDModesto, CA 953501679539415
- Yuqiang Ge, M.D., PHDModesto, CA 953501740588680
- Kriengsak Itsara, MDModesto, CA 953501558363739
- Chang Joo, MDModesto, CA 953501508868787
Common questions
What is Atul T. Roy, M.D.'s NPI number?
Atul T. Roy, M.D.'s National Provider Identifier (NPI) is 1467496505, issued on Jun 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Atul T. Roy, M.D. located?
The NPPES record lists a practice address at 1140 Olivewood Dr, Merced, CA, 95348. Phone: (209) 725-2121. Providers update this record themselves, so call before visiting.
How can I verify Atul T. Roy, M.D.'s license?
NPPES lists California license number A44403, 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 Atul T. Roy, M.D. prescribe under Medicare Part D?
In 2024, Atul T. Roy, M.D. had 2,637 Medicare Part D claims for 450 beneficiaries; the average among nephrology physician prescribers was 1,465. 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.