Quick answers
- Does Cynthia A. Pfeiff accept Medicare assignment?
- Yes. Medicare's clinician data says Cynthia A. Pfeiff 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 Cynthia A. Pfeiff see?
- In 2024, CMS data shows 49 Original Medicare patients and 117 services for Cynthia A. Pfeiff. This counts Original Medicare only and measures volume, not quality.
- What is Cynthia A. Pfeiff's NPI number?
- 1821006917. 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 Cynthia A. Pfeiff, 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 | 49 |
|---|---|
| Services billed to Medicare | 117 |
| Different services or procedures | 23 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Replacement of knee joint, both sides of knee (27447)19 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%
- Arthritis75%
- High cholesterol59%
- Diabetes33%
- Depression29%
- Anxiety22%
Hospitals where Cynthia A. Pfeiff works
Medicare's Facility Affiliation Data lists Cynthia A. Pfeiff 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.
- Highland HospitalOakland, CA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 050320
Practice locations
Addresses where Cynthia A. Pfeiff is enrolled with Medicare (CMS data updated October 2, 2026).
- 13855 E 14th StSan Leandro, CA 94578 (510) 357‑6500
- 1411 E 31st StOakland, CA 94602 (510) 437‑4800
- 6955 Foothill Blvd, Suite 200Oakland, CA 94605 (510) 567‑5704
- 815 Atlantic Ave, Suite 100Alameda, CA 94501 (510) 522‑6637
Group practices
Medicare enrollment lists Cynthia A. Pfeiff as a member of this group (CMS data updated October 2, 2026).
- Alameda Health System601 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in San Leandro
Clinicians with the same Medicare primary specialty in San Leandro, CA — not a recommendation.
Other clinicians in Alameda Health System
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2001 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1821006917 |
| 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