Quick answers
- Does Margreta M. Purcell accept Medicare assignment?
- Yes. Medicare's clinician data says Margreta M. Purcell 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 Margreta M. Purcell see?
- In 2024, CMS data shows 204 Original Medicare patients and 606 services for Margreta M. Purcell. This counts Original Medicare only and measures volume, not quality.
- What is Margreta M. Purcell's NPI number?
- 1538300132. 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 Margreta M. Purcell, 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 | 204 |
|---|---|
| Services billed to Medicare | 606 |
| Different services or procedures | 6 |
| Participating Medicare provider | Yes |
| Average age of these patients | 81 |
Most frequent services
- Anticoagulant management of patient taking warfarin (93793)299 services
- Provision of test materials and equipment for home inr monitoring of patient with either mechanical heart valve(s), chronic atrial fibrillation, or venous thromboembolism who meets medicare coverage criteria; includes: provision of materials for use in the (G0249)149 services
- Physician review, interpretation, and patient management of home inr testing for patient with either mechanical heart valve(s), chronic atrial fibrillation, or venous thromboembolism who meets medicare coverage criteria; testing not occurring more frequent (G0250)147 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%
- Atrial fibrillation75%
- Heart failure44%
- Ischemic heart disease40%
- Chronic kidney disease36%
Practice locations
Addresses where Margreta M. Purcell is enrolled with Medicare (CMS data updated October 2, 2026).
- 370 Distel CirLos Altos, CA 94022 (650) 254‑5200
- 701 E El Camino RealMountain View, CA 94040 (650) 691‑6174
Group practices
Medicare enrollment lists Margreta M. Purcell as a member of this group (CMS data updated October 2, 2026).
- Sutter Bay Medical Foundation3,829 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Los Altos
Clinicians with the same Medicare primary specialty in Los Altos, 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 | PA |
|---|---|
| School | Stanford University School Of Medicine |
| Graduation year | 1997 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1538300132 |
| 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