Quick answers
- Which hospitals does Michael J. Guarnieri work at?
- Medicare's official clinician data lists Michael J. Guarnieri at 1 hospital: Kaiser Foundation Hospital - Oakland/Richmond. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Michael J. Guarnieri see patients?
- Medicare's clinician data lists 6 practice locations, including Redwood City, CA, San Leandro, CA and Oakland, CA. Call before your visit to confirm the address.
- What is Michael J. Guarnieri's specialty?
- Medicare lists Pulmonary Disease as the primary specialty.
- Does Michael J. Guarnieri accept Medicare assignment?
- Yes. Medicare's clinician data says Michael J. Guarnieri accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Michael J. Guarnieri?
- (650) 299-2000, as listed in official Medicare / NPI Registry data.
- What is Michael J. Guarnieri's NPI number?
- 1851627004. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Michael J. Guarnieri works
Medicare's Facility Affiliation Data lists Michael J. Guarnieri at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Kaiser Foundation Hospital - Oakland/RichmondOakland, CA · Acute Care Hospital · CCN 050075
Practice locations
Addresses where Michael J. Guarnieri is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 1100 Veterans BlvdRedwood City, CA 94063 (650) 299‑2000
- 1150 Veterans BlvdRedwood City, CA 94063 (650) 299‑2000
- 1190 Veterans BlvdRedwood City, CA 94063 (650) 299‑2000
- 2500 Merced StSan Leandro, CA 94577 (510) 454‑1000
- 275 W Macarthur BlvdOakland, CA 94611 (510) 752‑1000
Group practices
Medicare enrollment lists Michael J. Guarnieri as a member of this group (CMS data updated 2026-10-02).
- Permanente Medical Group Inc10,996 clinicians in the group
Specialties
- Pulmonary Diseaseprimary
Other pulmonologists in Redwood City
Clinicians with the same Medicare primary specialty in Redwood City, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | New York University School Of Medicine |
| Graduation year | 2008 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1851627004 |
| 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 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- 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