Quick answers
- Which hospitals does Mahesh G. Kumar work at?
- Medicare's official clinician data lists Mahesh G. Kumar at 2 hospitals: Kaiser Foundation Hospital - San Diego and Kaiser Foundation Hospital - San Marcos. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mahesh G. Kumar see patients?
- Medicare's clinician data lists 3 practice locations, including San Marcos, CA and San Diego, CA. Call before your visit to confirm the address.
- What is Mahesh G. Kumar's specialty?
- Medicare lists Hospitalist as the primary specialty, and also Internal Medicine.
- Does Mahesh G. Kumar accept Medicare assignment?
- Yes. Medicare's clinician data says Mahesh G. Kumar accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Mahesh G. Kumar?
- (833) 574-2273, as listed in official Medicare / NPI Registry data.
- What is Mahesh G. Kumar's NPI number?
- 1578611430. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mahesh G. Kumar works
Medicare's Facility Affiliation Data lists Mahesh G. Kumar at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Kaiser Foundation Hospital - San DiegoSan Diego, CA · Acute Care Hospital · CCN 050515
- Kaiser Foundation Hospital - San MarcosSan Marcos, CA · Acute Care Hospital · CCN 050855
Practice locations
Addresses where Mahesh G. Kumar is enrolled with Medicare (CMS data updated 2026-10-02).
- 360 Rush DrSan Marcos, CA 92078 (833) 574‑2273
- 4647 Zion AveSan Diego, CA 92120 (619) 528‑5000
- 9455 Clairemont Mesa BlvdSan Diego, CA 92123 (858) 573‑1504
Group practices
Medicare enrollment lists Mahesh G. Kumar as a member of this group (CMS data updated 2026-10-02).
- Southern California Permanente Medical Group11,293 clinicians in the group
Specialties
- Hospitalistprimary
- Internal Medicinealso
Other hospitalists in San Marcos
Clinicians with the same Medicare primary specialty in San Marcos, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1989 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1578611430 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- 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