Quick answers
- Does Abbie C. Hageman accept Medicare assignment?
- Yes. Medicare's clinician data says Abbie C. Hageman 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 Abbie C. Hageman see?
- In 2024, CMS data shows 42 Original Medicare patients and 70 services for Abbie C. Hageman. This counts Original Medicare only and measures volume, not quality.
- What is Abbie C. Hageman's NPI number?
- 1053872192. 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 Abbie C. Hageman, 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 | 42 |
|---|---|
| Services billed to Medicare | 70 |
| Different services or procedures | 16 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)13 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)13 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 cholesterol67%
- High blood pressure33%
- Osteoporosis29%
- Arthritis26%
Practice locations
Addresses where Abbie C. Hageman is enrolled with Medicare (CMS data updated October 2, 2026).
- 123 S San Mateo DrSan Mateo, CA 94401 (650) 343‑4200
- 301 Industrial RdSan Carlos, CA 94070
- 370 Distel CirLos Altos, CA 94022 (650) 254‑5200
- 725 Welch RdPalo Alto, CA 94304 (650) 497‑8000
- 795 El Camino RealPalo Alto, CA 94301 (415) 600‑1020
Group practices
Medicare enrollment lists Abbie C. Hageman as a member of this group (CMS data updated October 2, 2026).
- Sutter Bay Medical Foundation3,829 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in San Mateo
Clinicians with the same Medicare primary specialty in San Mateo, 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 |
|---|---|
| Graduation year | 2019 (7 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) | 1053872192 |
| 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