Quick answers
- Does Jayaram S. Hariharan accept Medicare assignment?
- Yes. Medicare's clinician data says Jayaram S. Hariharan accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Jayaram S. Hariharan see?
- In 2024, CMS data shows 178 Original Medicare patients and 1,468 services for Jayaram S. Hariharan. This counts Original Medicare only and measures volume, not quality.
- What is Jayaram S. Hariharan's NPI number?
- 1790004638. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Jayaram S. Hariharan, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 178 |
|---|---|
| Services billed to Medicare | 1,468 |
| Different services or procedures | 38 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Hyaluronan or derivative, synvisc or synvisc-one, for intra-articular injection, 1 mg (J7325)824 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)155 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)100 services
- Aspiration and/or injection of fluid from large joint (20610)77 services
- Injection, triamcinolone acetonide, not otherwise specified, 10 mg (J3301)76 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol75%
- High blood pressure66%
- Arthritis49%
- Diabetes26%
- Anxiety24%
- Ischemic heart disease22%
Practice locations
Addresses where Jayaram S. Hariharan is enrolled with Medicare (CMS data updated October 2, 2026).
- 2400 Balfour Rd, Suite 120Brentwood, CA 94513 (925) 308‑8112
Group practices
Medicare enrollment lists Jayaram S. Hariharan as a member of this group (CMS data updated October 2, 2026).
- John Muir Physician Network494 clinicians in the group
Specialties
- Family Practiceprimary
- Sports Medicinealso
Other family doctors in Brentwood
Clinicians with the same Medicare primary specialty in Brentwood, CA — not a recommendation.
Other clinicians in John Muir Physician Network
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1982 (44 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1790004638 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians