Calvin So, MD
NPI 1629156229 · Allergy & Immunology Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Allergy/Immunology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Calvin So, MD is a Allergy & Immunology Physician provider in San Francisco, CA (NPI 1629156229).
Provider details
- NPI number
- 1629156229
- Entity type
- Individual
- Primary specialty
- Allergy & Immunology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A78667 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Azelastine Hcl | 126 | 52 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 86 | 43 |
| Tiotropium Bromidebrand: Spiriva Respimat | 80 | 22 |
| Fluticasone Propionate | 67 | 22 |
| Budesonide/Formoterol Fumaratebrand: Breyna | 60 | 22 |
| Montelukast Sodium | 54 | 25 |
| Fluticasone Propion/Salmeterol |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-01
- Last updated
- 2021-12-13
Frequently asked questions
- What is Calvin So's NPI number?
- Calvin So's National Provider Identifier (NPI) is 1629156229, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Calvin So's specialty?
- Calvin So is listed in the NPPES registry with a primary specialty of Allergy & Immunology Physician (Allopathic & Osteopathic Physicians).
- Where is Calvin So located?
- Calvin So's practice location on file with NPPES is 2200 Ofarrell St, San Francisco, CA 94115-3357.
- What is Calvin So's phone number?
- The practice phone number listed in the NPPES registry for Calvin So is (415) 833-2000.
- Does Calvin So accept Medicare?
- Calvin So is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Calvin So's NPI active?
- Yes — Calvin So's NPI (1629156229) is active in the NPPES registry as of the last update on 2021-12-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.