JOHN A. BRENNAN (M.D.) – Anatomic Pathology & Clinical Pathology Physician, NPI 1649242389

JOHN A. BRENNAN (M.D.) is a healthcare provider. based in Dubuque, Iowa. specializing in Anatomic Pathology & Clinical Pathology Physician. They hold the professional credentials M.D.. They hold a License No. 19899 (IA). The NPI Number for JOHN A. BRENNAN (M.D.) is 1649242389

Main info

Male
Name
JOHN A. BRENNAN (M.D.)
NPI
1649242389
Phone
(563) 556-2012
Address
250 MERCY DR
Enumeration Date
6 February 2006
Last Update Date
31 July 2013
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 JOHN A. BRENNAN (M.D.)

  • MercyOne Dubuque Medical Center, 250, Mercy Drive, Dubuque, Dubuque County, Iowa, 52001, United States

    P O BOX 731

    DUBUQUE, IA 520040731

    Phone: (563) 556-2012

    Type: Mailing

  • Finley Hospital, 350, North Grandview Avenue, Dubuque, Dubuque County, Iowa, 52001, United States

    DUBUQUE, IA 520016388

    Phone: (563) 589-2431

    Type: Location

NPPES updates history

No NPPES updates recorded for this provider.

Prescription Activity

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Open Payments (CMS)

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Medicare Enrollment & Revalidation

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Medicare Utilization (FFS)

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

Insurance plans in this area (ZIP 52004)

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Frequently asked questions

What unique ID ties claims to JOHN A. BRENNAN (M.D.)?
NPI 1649242389 is assigned to JOHN A. BRENNAN (M.D.) under the national enumeration system.
Is JOHN A. BRENNAN (M.D.)'s NPI currently valid?
The extract we use shows JOHN A. BRENNAN (M.D.) as active.
Can you summarize JOHN A. BRENNAN (M.D.)'s specialty in plain language?
Clinically, the directory lists JOHN A. BRENNAN (M.D.) with Anatomic Pathology & Clinical Pathology Physician. Clinical services aligned with this taxonomy classification.
Where does public data place JOHN A. BRENNAN (M.D.)?
The snapshot lists Dubuque, Iowa for JOHN A. BRENNAN (M.D.); download NPPES for the complete set.
How can I contact JOHN A. BRENNAN (M.D.)?
Phone or fax may appear on the official NPI record when supplied — verify before relying on them.

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