Quick answers
- Does Caroline M. Schreiber accept Medicare assignment?
- Yes. Medicare's clinician data says Caroline M. Schreiber 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 Caroline M. Schreiber see?
- In 2024, CMS data shows 320 Original Medicare patients and 1,492 services for Caroline M. Schreiber. This counts Original Medicare only and measures volume, not quality.
- What is Caroline M. Schreiber's NPI number?
- 1972617637. 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 Caroline M. Schreiber, 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 | 320 |
|---|---|
| Services billed to Medicare | 1,492 |
| Different services or procedures | 40 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)372 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)183 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)174 services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)60 services
- Administration of influenza virus vaccine (G0008)31 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 pressure48%
- Arthritis36%
- Anxiety20%
- Depression18%
- Osteoporosis18%
Hospitals where Caroline M. Schreiber works
Medicare's Facility Affiliation Data lists Caroline M. Schreiber 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.
- Alta Bates Summit Medical CenterOakland, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050043
- Alta Bates Summit Medical Center - Alta Bates CampBerkeley, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050305
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050180
- UCSF Medical CenterSan Francisco, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050454
Practice locations
Addresses where Caroline M. Schreiber is enrolled with Medicare (CMS data updated October 2, 2026).
- 2400 Balfour Rd, Suite 120Brentwood, CA 94513 (925) 308‑8112
- 3100 San Pablo AveBerkeley, CA 94702
Group practices
Medicare enrollment lists Caroline M. Schreiber as a member of this group (CMS data updated October 2, 2026).
- John Muir Physician Network494 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Brentwood
Clinicians with the same Medicare primary specialty in Brentwood, CA — not a recommendation.
Other clinicians in John Muir Physician Network
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Michigan Medical School |
| Graduation year | 2003 (23 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) | 1972617637 |
| 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