Quick answers
- Does Lesley C. Martin accept Medicare assignment?
- Yes. Medicare's clinician data says Lesley C. Martin 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 Lesley C. Martin see?
- In 2024, CMS data shows 681 Original Medicare patients and 89,974 services for Lesley C. Martin. This counts Original Medicare only and measures volume, not quality.
- What is Lesley C. Martin's NPI number?
- 1114900834. 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 Lesley C. Martin, 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 | 681 |
|---|---|
| Services billed to Medicare | 89,974 |
| Different services or procedures | 114 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Injection, fosaprepitant, 1 mg (J1453)4,200 services
- Injection, epoetin alfa-epbx, biosimilar, (retacrit) (for non-esrd use), 1000 units (Q5106)2,800 services
- Injection, dexamethasone sodium phosphate, 1 mg (J1100)1,060 services
- Injection, palonosetron hcl, 25 mcg (J2469)760 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)750 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 pressure74%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)48%
- Arthritis45%
- Chronic kidney disease35%
- Diabetes30%
Hospitals where Lesley C. Martin works
Medicare's Facility Affiliation Data lists Lesley C. Martin 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.
- John Muir Medical Center - Concord CampusConcord, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050496
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050180
- Sutter Medical Center, SacramentoSacramento, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050108
- Sutter Solano Medical CenterVallejo, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050101
Practice locations
Addresses where Lesley C. Martin is enrolled with Medicare (CMS data updated October 2, 2026).
- 100 Hospital Dr, Suite 110bVallejo, CA 94589 (707) 551‑3333
- 2571 Park AveConcord, CA 94520 (925) 674‑2100
Group practices
Medicare enrollment lists Lesley C. Martin as a member of this group (CMS data updated October 2, 2026).
- John Muir Physician Network494 clinicians in the group
Specialties
- Hematology/Oncologyprimary
Other hematologist-oncologists in Vallejo
Clinicians with the same Medicare primary specialty in Vallejo, 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 |
|---|---|
| Medical school | University Of California, San Francisco School Of Medicine |
| Graduation year | 2000 (26 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1114900834 |
| 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