Quick answers
- Does Erik H. Gaensler accept Medicare assignment?
- Yes. Medicare's clinician data says Erik H. Gaensler 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 Erik H. Gaensler see?
- In 2024, CMS data shows 1,793 Original Medicare patients and 13,134 services for Erik H. Gaensler. This counts Original Medicare only and measures volume, not quality.
- What is Erik H. Gaensler's NPI number?
- 1376598474. 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 Erik H. Gaensler, 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 | 1,793 |
|---|---|
| Services billed to Medicare | 13,134 |
| Different services or procedures | 183 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Injection, gadobutrol, 0.1 ml (A9585)10,559 services
- X-ray of chest, 1 view (71045)370 services
- Mri scan of brain without contrast (70551)223 services
- Mri scan of brain before and after contrast (70553)152 services
- Ct scan head or brain without contrast (70450)149 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 cholesterol74%
- Arthritis45%
- Chronic kidney disease36%
- Diabetes35%
- Depression28%
Hospitals where Erik H. Gaensler works
Medicare's Facility Affiliation Data lists Erik H. Gaensler 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
- Eden Medical CenterCastro Valley, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050488
- Sutter Delta Medical CenterAntioch, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050523
- Sutter Solano Medical CenterVallejo, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050101
Practice locations
Addresses where Erik H. Gaensler is enrolled with Medicare (CMS data updated October 2, 2026).
- 3000 Telegraph AveOakland, CA 94609 (510) 869‑8777
- 5730 Telegraph AveOakland, CA 94609 (510) 204‑2744
Group practices
Medicare enrollment lists Erik H. Gaensler as a member of these groups (CMS data updated October 2, 2026).
- Bay Imaging Consultants Medical Group Inc146 clinicians in the group
- Magnetic Imaging Affiliates LLC45 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Oakland
Clinicians with the same Medicare primary specialty in Oakland, CA — not a recommendation.
Other clinicians in Bay Imaging Consultants Medical Group Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Harvard Medical School |
| Graduation year | 1984 (42 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1376598474 |
| 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