Organization Profile
John P. Katzenberg
Unclaimed ProfileAbout John P. Katzenberg
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Providers in This Building & Nearby
From registry street addresses: providers filed at this building, which can include unrelated practices sharing it.
- Marc C. Valli, D.M.D. Dentist
- Molly H. Valli, DMD Dentist
- Peter E. Breen, D.M.D General Practice Dentistry
Specialty
Credentials & Licensing
Source: NPPES NPI Registry
Contact Information
- (978) 448-6855
- Email not available
Practice Locations
292 MAIN ST.
Groton, MA 01450
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 1
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 3
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 practice is John P. Katzenberg?
John P. Katzenberg is an internist in Groton, MA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Internal Medicine”.
NPI registry
What is John P. Katzenberg's address?
John P. Katzenberg is listed at 292 Main St., Groton, MA 01450. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with John P. Katzenberg?
The number on file is (978) 448-6855. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for John P. Katzenberg?
John P. Katzenberg's National Provider Identifier is 1689716813. 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
Is John P. Katzenberg's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by John P. Katzenberg. If this is you, claiming it is free.
Guide.md
Is this your practice?
Manage this listing? Log in or create an account, then click “This is my practice and I manage it” here. A verified physician whose registry address matches this location is approved instantly; everyone else is reviewed by a person.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.