Christopher Ryerson, M.D.
NPI 1538495635 · Pulmonary Disease Physician · San Francisco, CA
Christopher Ryerson, M.D. is a Pulmonary Disease Physician provider in San Francisco, CA (NPI 1538495635).
Provider details
- NPI number
- 1538495635
- Entity type
- Individual
- Primary specialty
- Pulmonary Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A109442 (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
16 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-10-23
- Last updated
- 2009-10-23
Frequently asked questions
- What is Christopher Ryerson's NPI number?
- Christopher Ryerson's National Provider Identifier (NPI) is 1538495635, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Christopher Ryerson's specialty?
- Christopher Ryerson is listed in the NPPES registry with a primary specialty of Pulmonary Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Christopher Ryerson located?
- Christopher Ryerson's practice location on file with NPPES is 505 Parnassus Ave # M1087, San Francisco, CA 94143-2204.
- What is Christopher Ryerson's phone number?
- The practice phone number listed in the NPPES registry for Christopher Ryerson is (514) 283-6357.
- Is Christopher Ryerson's NPI active?
- Yes — Christopher Ryerson's NPI (1538495635) is active in the NPPES registry as of the last update on 2009-10-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.