Ajay K. Toppur Ramanakumar, M.D
Internal Medicine Physician · Stockton, CA
Ajay K. Toppur Ramanakumar, M.D is an internal medicine physician with a practice address in Stockton, California, and NPI 1659539153, issued on May 30, 2008. Check the license (California A124907, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ajay K. Toppur Ramanakumar
- Credential
- M.D
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- A124907 CA
MT185553 PA
Self-reported in NPPES; status is on the state search - Practice location
- 415 E Harding Way, Stockton, CA 95204
- Phone
- (209) 944-5750
- Enumerated
- May 30, 2008
- Record last updated
- Jul 17, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (209) 464-2684
- Medicare enrollment
- Enrolled (PECOS I20130717000821); 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 415 E Harding Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Caroline Andersen, PAMedical Physician Assistant1669755682
- Donna Burke, ANPAdult Health Nurse Practitioner1942589965
- George Charos, M.D.Cardiovascular Disease Physician1417904145
- Abbas Chothia, M.D.Cardiovascular Disease Physician1467490441
- Ronald Dugger, MDSpecialist1790720688
- Masanobu Kamigaki, MDCardiovascular Disease Physician1700035334
Verify Ajay K. Toppur Ramanakumar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A124907Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.4 times the Medicare Part D claims of the average internal medicine physician in 2024
10,753 Medicare Part D claims for 1,491 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Atorvastatin Calcium1,249 claims
- Metoprolol Succinate1,075 claims
- Eliquis715 claims
- Rosuvastatin Calcium703 claims
- Ezetimibe684 claims
- Losartan Potassium682 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,596.80
18 payments; by number, the most common kind was food and beverage; the largest payer was Medtronic, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Stockton Cardiology Medical Group Complete Heart Care IncManteca, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ajay K. Toppur Ramanakumar among 17,696 internal medicine physician records in California
Ajay K. Toppur Ramanakumar, 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 2008, is newer than 56% of them.
- NPI issued2008 · 56% of these records are older, 40% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2002 · median 2004 among the 11,065 with a school on file
- Record last updated2013 · 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).
89 internal medicine physician records list a practice address in Stockton
They are 89 of the 9,522 NPPES records with a practice address in Stockton, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Stockton → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Tanveer Bajwa, M.D.Stockton, CA 952041871871681
- Cecelia Blawie, MDStockton, CA 952041245261742
- Richard Camacho, MDStockton, CA 952041649253881
- Dorothy Do-Williams, M.D.Stockton, CA 952041215237631
- Nivedita Doshi, M.D.Stockton, CA 952041417301987
- Aziz Kamali, M.D.Stockton, CA 952041306923883
- Mrinmayee Naik, M.D.Stockton, CA 952041639559081
- Sundar Natarajan, M.D.Stockton, CA 952041588794085
Common questions
What is Ajay K. Toppur Ramanakumar, M.D's NPI number?
Ajay K. Toppur Ramanakumar, M.D's National Provider Identifier (NPI) is 1659539153, issued on May 30, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Ajay K. Toppur Ramanakumar, M.D located?
The NPPES record lists a practice address at 415 E Harding Way, Stockton, CA, 95204. Phone: (209) 944-5750. Providers update this record themselves, so call before visiting.
How can I verify Ajay K. Toppur Ramanakumar, M.D's license?
NPPES lists California license number A124907, 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 Ajay K. Toppur Ramanakumar, M.D prescribe under Medicare Part D?
In 2024, Ajay K. Toppur Ramanakumar, M.D had 10,753 Medicare Part D claims for 1,491 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Ajay K. Toppur Ramanakumar, M.D's MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.