Quick answers
- Where does Calvin S. So see patients?
- Medicare's clinician data lists 2 practice locations, including San Francisco, CA. Call before your visit to confirm the address.
- What is Calvin S. So's specialty?
- Medicare lists Allergy/Immunology as the primary specialty, and also Internal Medicine.
- Does Calvin S. So accept Medicare assignment?
- Yes. Medicare's clinician data says Calvin S. So 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.
- Does Calvin S. So offer telehealth?
- Medicare's clinician data says Calvin S. So offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Calvin S. So?
- (415) 833-2000, as listed in official Medicare / NPI Registry data.
- What is Calvin S. So's NPI number?
- 1629156229. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Calvin S. So is enrolled with Medicare (CMS data updated 2026-10-02).
- 2200 Ofarrell StSan Francisco, CA 94115 (415) 833‑2000
- 2238 Geary BlvdSan Francisco, CA 94115 (415) 833‑2200
Group practices
Medicare enrollment lists Calvin S. So as a member of this group (CMS data updated 2026-10-02).
- Permanente Medical Group Inc10,996 clinicians in the group
Specialties
- Allergy/Immunologyprimary
- Internal Medicinealso
Other allergist and immunologists in San Francisco
Clinicians with the same Medicare primary specialty in San Francisco, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical College Of Wisconsin |
| Graduation year | 2000 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1629156229 |
| 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 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