Physician Profile
Unclaimed ProfileAbout JANSSEN
William J Janssen, MD is a healthcare provider in Denver, CO specializing in pulmonary disease. William trained at Ohio State University College of Medicine, graduating in 1998. William is also listed as specializing in critical care medicine.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (303) 388-4461
- Email not available
Practice Locations
1400 JACKSON ST
Denver, CO 80206
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 pulmonary diseases at this location 8
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 3
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 — 20 related providers in 3 groups
Other pulmonary diseases in Denver 5
Same specialty, same city.
Trained at Ohio State University College of Medicine 7
Other providers in the same specialty who trained at the same institution.
Class of 1998 at Ohio State University College of Medicine 8
Providers who graduated from the same medical school in the same year.
Common questions
What kind of doctor is Dr. Janssen?
Dr. Janssen is a pulmonary disease in Denver, CO. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “PULMONARY DISEASE”.
NPI registry
What is Dr. Janssen's address?
Dr. Janssen is listed at 1400 JACKSON ST, Denver, CO 80206. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Janssen?
The number on file is (303) 388-4461. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Janssen?
Dr. Janssen's National Provider Identifier is 1811905367. 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. Janssen train?
Dr. Janssen attended Ohio State University College of Medicine, graduating in 1998. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Janssen have?
Dr. Janssen has 28 years experience. Calculated from a graduation year of 1998, reported in the CMS National Downloadable File.
CMS public data
Is Dr. Janssen's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Janssen. If this is you, claiming it is free.
Guide.md
Is this your profile?
Verify your identity to control how patients — and AI assistants — describe you.
Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.