Quick answers
- Does Leland J. Foshag accept Medicare assignment?
- Yes. Medicare's clinician data says Leland J. Foshag 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 Leland J. Foshag see?
- In 2024, CMS data shows 206 Original Medicare patients and 783 services for Leland J. Foshag. This counts Original Medicare only and measures volume, not quality.
- What is Leland J. Foshag's NPI number?
- 1659441293. 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 Leland J. Foshag, 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 | 206 |
|---|---|
| Services billed to Medicare | 783 |
| Different services or procedures | 103 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)201 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)139 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)43 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)36 services
- New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)27 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 blood pressure75%
- High cholesterol75%
- Arthritis56%
- Ischemic heart disease45%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)37%
- Atrial fibrillation30%
Hospitals where Leland J. Foshag works
Medicare's Facility Affiliation Data lists Leland J. Foshag at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Cedars-Sinai Medical CenterLos Angeles, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050625
- Saint John's Health CenterSanta Monica, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050290
Practice locations
Addresses where Leland J. Foshag is enrolled with Medicare (CMS data updated October 2, 2026).
- 2001 Santa Monica Blvd, Suite 560wSanta Monica, CA 90404 (310) 582‑7900
Group practices
Medicare enrollment lists Leland J. Foshag as a member of this group (CMS data updated October 2, 2026).
- Cedars-Sinai Medical Care Foundation1,692 clinicians in the group
Specialties
- Surgical Oncologyprimary
Other surgical oncologists in Santa Monica
Clinicians with the same Medicare primary specialty in Santa Monica, CA — not a recommendation.
Other clinicians in Cedars-Sinai Medical Care Foundation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Ohio State University College Of Medicine |
| Graduation year | 1975 (51 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1659441293 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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