Ajay Toppur Ramanakumar, M.D
NPI 1659539153 · Internal Medicine Physician · Stockton, CA
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ajay Toppur Ramanakumar, M.D is a Internal Medicine Physician provider in Stockton, CA (NPI 1659539153).
Provider details
- NPI number
- 1659539153
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D
- Sex
- Male
- Sole proprietor
- No
- License
- A124907 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
12,486 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 1,987 | $63 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 1,821 | $130 |
| Chronic Care Management Services for Two Or More Chronic Conditions, Additional 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99439 | 1,738 | $49 |
| Management Using the Results of Remote Vital Sign Monitoring Per Calendar Month, First 20 Minutes99457 | 709 | $50 |
| Remote Monitoring of Physiologic Parameters, Initial Supply of Devices With Daily Recordings Or Programmed Alerts Transmission, Each 30 Days99454 | 670 | $51 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 68 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 1,249 | 404 |
| Metoprolol Succinate | 1,075 | 339 |
| Apixabanbrand: Eliquis | 715 | 212 |
| Rosuvastatin Calcium | 703 | 240 |
| Ezetimibe | 684 | 230 |
| Losartan Potassium | 682 | 211 |
| Amlodipine Besylate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,597 across 18 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-05-30
- Last updated
- 2013-07-17
Frequently asked questions
- What is Ajay Toppur Ramanakumar's NPI number?
- Ajay Toppur Ramanakumar's National Provider Identifier (NPI) is 1659539153, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ajay Toppur Ramanakumar's specialty?
- Ajay Toppur Ramanakumar is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ajay Toppur Ramanakumar located?
- Ajay Toppur Ramanakumar's practice location on file with NPPES is 415 E Harding Way, Stockton, CA 95204-6118.
- What is Ajay Toppur Ramanakumar's phone number?
- The practice phone number listed in the NPPES registry for Ajay Toppur Ramanakumar is (209) 944-5750.
- Does Ajay Toppur Ramanakumar accept Medicare?
- Ajay Toppur Ramanakumar is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ajay Toppur Ramanakumar's NPI active?
- Yes — Ajay Toppur Ramanakumar's NPI (1659539153) is active in the NPPES registry as of the last update on 2013-07-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.