Quick answers
- Does Dana M. Weisshaar accept Medicare assignment?
- Yes. Medicare's clinician data says Dana M. Weisshaar 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 Dana M. Weisshaar see?
- In 2024, CMS data shows 35 Original Medicare patients and 84 services for Dana M. Weisshaar. This counts Original Medicare only and measures volume, not quality.
- What is Dana M. Weisshaar's NPI number?
- 1952475550. 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 Dana M. Weisshaar, 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 | 35 |
|---|---|
| Services billed to Medicare | 84 |
| Different services or procedures | 11 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)21 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)20 services
- New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)18 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)17 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%
- Ischemic heart disease75%
- Arthritis46%
- Heart failure37%
- Atrial fibrillation31%
Practice locations
Addresses where Dana M. Weisshaar is enrolled with Medicare (CMS data updated October 2, 2026).
- 112 Peach Willow CtLos Gatos, CA 95032 (408) 459‑8899
- 2577 Samaritan Dr, Suite 845San Jose, CA 95124 (408) 610‑2001
Group practices
Medicare enrollment lists Dana M. Weisshaar as a member of these groups (CMS data updated October 2, 2026).
- Mohammed S Qayyum MD Inc4 clinicians in the group
- Empallo Medical Group, P.A.2 clinicians in the group
Specialties
- Cardiovascular Disease (Cardiology)primary
- Advanced Heart Failure and Transplant Cardiologyalso
- Internal Medicinealso
Find other Cardiovascular Disease (Cardiology) doctors in California →
Other cardiologists in Los Gatos
Clinicians with the same Medicare primary specialty in Los Gatos, CA — not a recommendation.
Other clinicians in Mohammed S Qayyum MD Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical College Of Ohio |
| Graduation year | 1989 (37 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) | 1952475550 |
| 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