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Edit this profileAt a glance
- 1425 S Main St, Walnut Creek, CA 94596
About Dr. Johannessen
Based in Walnut Creek, CA, Helge Johannessen, MD is listed in the NPI registry under internal medicine. NPI 1295813392 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
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
- (925) 295-4000
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
1425 S MAIN ST
Walnut Creek, CA 94596
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 internists at this location 3
Same specialty, same street address — most likely the same department or group.
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.
More connections — 22 related providers in 3 groups
Other internists in Walnut Creek 6
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 1986 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What does Dr. Johannessen specialize in?
Dr. Johannessen is an internist in Walnut Creek, 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. Johannessen located?
Dr. Johannessen is listed at 1425 S Main St, Walnut Creek, CA 94596. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Johannessen's phone number?
The number on file is (925) 295-4000. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Johannessen's NPI number?
Dr. Johannessen's National Provider Identifier is 1295813392. 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
Where did Dr. Johannessen go to medical school?
Dr. Johannessen attended Other, graduating in 1986. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Johannessen been practicing?
Dr. Johannessen has 40 years experience. Calculated from a graduation year of 1986, reported in the CMS National Downloadable File.
CMS public data
Has Dr. Johannessen confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Johannessen. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.