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Edit this profileAt a glance
- 1501 5Th Ave Ste 100, San Diego, CA 92101
About Dr. Duffy
Michael S. Duffy, DO practices internal medicine in San Diego, CA. The provider's National Provider Identifier (NPI) is 1851399802.
Factual summary compiled by Guide.md from public records; not written by this provider.
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (619) 647-5072
- Email not available
Practice Locations
1501 5TH AVE STE 100
San Diego, CA 92101
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Related specialists at this location 2
Clinically related specialties at the same address — the people this provider most likely works alongside.
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 does Dr. Duffy specialize in?
Dr. Duffy is an internist in San Diego, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Internal Medicine”.
NPI registry
Where is Dr. Duffy located?
Dr. Duffy is listed at 1501 5Th Ave Ste 100, San Diego, CA 92101. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Duffy's phone number?
The number on file is (619) 647-5072. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Duffy's NPI number?
Dr. Duffy's National Provider Identifier is 1851399802. 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 Dr. Duffy been practicing?
Dr. Duffy has 21+ years experience. Registered with an NPI since 2005. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
Has Dr. Duffy confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Duffy. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.