Quick answers
- Does Katharine L. Ball accept Medicare assignment?
- Yes. Medicare's clinician data says Katharine L. Ball 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 Katharine L. Ball see?
- In 2024, CMS data shows 1,115 Original Medicare patients and 7,672 services for Katharine L. Ball. This counts Original Medicare only and measures volume, not quality.
- What is Katharine L. Ball's NPI number?
- 1801004650. 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 Katharine L. Ball, 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 | 1,115 |
|---|---|
| Services billed to Medicare | 7,672 |
| Different services or procedures | 106 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Destruction of precancer skin growth, 2-14 growths (17003)3,124 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)1,007 services
- Destruction of precancer skin growth, 1 growth (17000)854 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)533 services
- Destruction of skin growth, 1-14 growths (17110)348 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 pressure68%
- Arthritis41%
- Ischemic heart disease27%
- Osteoporosis22%
- Diabetes20%
Practice locations
Addresses where Katharine L. Ball is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 7; the Medicare profile lists all.
- 18988 Cox Ave, Suite BSaratoga, CA 95070 (408) 253‑4407
- 2420 Samaritan DrSan Jose, CA 95124 (408) 369‑5600
- 2950 Research Park DrSoquel, CA 95073 (831) 458‑5548
- 370 Distel CirLos Altos, CA 94022 (650) 254‑5200
- 401 Old San Francisco RdSunnyvale, CA 94086 (408) 739‑6000
Group practices
Medicare enrollment lists Katharine L. Ball as a member of these groups (CMS data updated October 2, 2026).
- Sutter Bay Medical Foundation3,829 clinicians in the group
- Csi Medical Group111 clinicians in the group
Specialties
Other dermatologists in Saratoga
Clinicians with the same Medicare primary specialty in Saratoga, CA — not a recommendation.
Other clinicians in Sutter Bay Medical Foundation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Jefferson Medical College Of Thomas Jefferson University |
| Graduation year | 2007 (19 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1801004650 |
| 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