Are you Melissa Ryan, RN? This profile is yours to edit: update your address, phone, photo and services.
Edit this profileAt a glance
- 505 Parnassus Ave, San Francisco, CA 94143
About Melissa Ryan
Based in San Francisco, CA, Melissa Ryan, RN is listed in the NPI registry under hematology & oncology. NPI 1558230938 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Specialty
Credentials & Licensing
Contact Information
- (415) 353-1383
- Email not available
Practice Locations
505 PARNASSUS AVE
San Francisco, CA 94143
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other cancer specialists at this location 1
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Common questions
What kind of doctor is Melissa Ryan?
Melissa Ryan is a cancer specialist in San Francisco, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Hematology & Oncology”.
NPI registry
What is Melissa Ryan's address?
Melissa Ryan is listed at 505 Parnassus Ave, San Francisco, CA 94143. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Melissa Ryan?
The number on file is (415) 353-1383. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Melissa Ryan's NPI number?
Melissa Ryan's National Provider Identifier is 1558230938. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
How long has Melissa Ryan been practicing?
Melissa Ryan has 1+ years experience. Registered with an NPI since 2025. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
Has Melissa Ryan confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Melissa Ryan. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.