Physician Profile

Gary Maassen, M.D.

Unclaimed Profile

About Dr. Maassen

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Specialty

Internal Medicine (Primary)

Credentials & Licensing

MO licenseR7H60
NPI1831170968
NPI issued11/07/2005

Source: NPPES NPI Registry

Common questions

What kind of doctor is Gary Maassen?

Gary Maassen is an internist in Saint Louis, MO. That is the designation recorded for this NPI in the federal registry, where it is listed as “Internal Medicine”.

NPI registry

What is Gary Maassen's address?

Gary Maassen is listed at 5034 Griffin Rd, Saint Louis, MO 63128. Addresses come from the NPI registry and can lag a move, so confirm before travelling.

NPI registry

How can I make an appointment with Gary Maassen?

The number on file is (314) 843-7333. Guide.md cannot book appointments or pass on messages — please call the office directly.

NPI registry

What is Gary Maassen's NPI number?

Gary Maassen's National Provider Identifier is 1831170968. 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 Gary Maassen been practicing?

Gary Maassen 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 Gary Maassen confirmed this information?

Not yet. This profile is built from public federal data and has not been confirmed by Gary Maassen. If this is you, claiming it is free.

Guide.md

Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.