MR. DENNIS O. MAYER (MD) – Internal Medicine Physician, NPI 1235112723

MR. DENNIS O. MAYER (MD) is a healthcare provider. based in Milwaukie, Oregon. specializing in Internal Medicine Physician. They hold the professional credentials MD. They hold a License No. MD10890 (OR). The NPI Number for MR. DENNIS O. MAYER (MD) is 1235112723

Main info

Male
Name
MR. DENNIS O. MAYER (MD)
NPI
1235112723
Phone
(503) 659-4777
Address
PO BOX 22075
Enumeration Date
29 November 2005
Last Update Date
2 August 2010
Data current as of
19 May 2026

Profile Insights

NPPES metrics only — not quality of care.

Methodology
Experience54
Completeness75
Years active:20State licenses:1Digital endpointsOther names

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Provider Addresses for MR. DENNIS O. MAYER (MD)

  • PO BOX 22075

    MILWAUKIE, OR 972692075

    Phone: (503) 659-4777

    Fax: (503) 652-5223

    Type: Mailing

  • Southeast 32nd Avenue, Lake Road, Milwaukie, Clackamas County, Oregon, 97222, United States

    MILWAUKIE, OR 972226514

    Phone: (503) 659-4988

    Fax: (503) 654-5666

    Type: Location

NPPES updates history

No NPPES updates recorded for this provider.

Prescription Activity

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Open Payments (CMS)

No Open Payments data available for this provider.

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Medicare Enrollment & Revalidation

Source: CMS public data · Not endorsed by CMS ·

Educational use only—not medical, billing, or legal advice.

No Medicare enrollment or revalidation data available for this provider in our database.

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Medicare Utilization (FFS)

Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·

Educational use only—not medical, billing, or legal advice.

No Medicare fee-for-service utilization data available for this provider in our database.

Insurance plans in this area (ZIP 97269)

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Reviews

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Frequently asked questions

Is MR. DENNIS O. MAYER (MD) listed with a National Provider Identifier?
Yes — MR. DENNIS O. MAYER (MD) has NPI 1235112723 on file in the registry.
Is there an active status for MR. DENNIS O. MAYER (MD)?
For scheduling context, MR. DENNIS O. MAYER (MD) is shown as active in the registry.
What kind of doctor is MR. DENNIS O. MAYER (MD)?
MR. DENNIS O. MAYER (MD) is associated with Internal Medicine Physician in the directory — Clinical services aligned with this taxonomy classification.
What locale is associated with MR. DENNIS O. MAYER (MD)?
Directory geography for MR. DENNIS O. MAYER (MD) centers on Milwaukie, Oregon.
Can I trust this NPI listing for MR. DENNIS O. MAYER (MD)?
The listing is sourced from the national NPI registry. If something looks off, compare with NPPES and the clinic's website.

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