DR. WILLIAM JOHN GEIMEIER (M.D.) – Allergy Physician, NPI 1003848474

DR. WILLIAM JOHN GEIMEIER (M.D.) is a healthcare provider. based in Newark, Delaware. specializing in Allergy Physician. They hold the professional credentials M.D.. They hold a License No. C1-0001765 (DE). The NPI Number for DR. WILLIAM JOHN GEIMEIER (M.D.) is 1003848474

Main info

Male
Sole Proprietor
Name
DR. WILLIAM JOHN GEIMEIER (M.D.)
NPI
1003848474
Phone
(302) 453-1343
Address
179 W CHESTNUT HILL RD
Enumeration Date
7 July 2006
Last Update Date
8 July 2007
Data current as of
19 May 2026

Profile Insights

NPPES metrics only — not quality of care.

Methodology
Experience52
Completeness75
Years active:19State licenses:1Digital endpointsOther names

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Provider Addresses for DR. WILLIAM JOHN GEIMEIER (M.D.)

  • 179, West Chestnut Hill Road, Cottage Mill, Newark, New Castle County, Delaware, 19713, United States

    SUITE 1

    NEWARK, DE 197132210

    Phone: (302) 453-1343

    Fax: (302) 453-1654

    Mailing address matches the actual address.

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.

This can happen when there are no reportable CMS Open Payments records.

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 19713)

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Reviews

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Frequently asked questions

What federal number belongs to DR. WILLIAM JOHN GEIMEIER (M.D.)?
The federal identifier for DR. WILLIAM JOHN GEIMEIER (M.D.) is NPI 1003848474.
Is DR. WILLIAM JOHN GEIMEIER (M.D.)'s NPI currently valid?
The extract we use shows DR. WILLIAM JOHN GEIMEIER (M.D.) as active.
What kind of provider is DR. WILLIAM JOHN GEIMEIER (M.D.)?
The page reflects Allergy Physician for DR. WILLIAM JOHN GEIMEIER (M.D.). Clinical services aligned with this taxonomy classification.
What location shows for DR. WILLIAM JOHN GEIMEIER (M.D.)?
We surface Newark, Delaware for DR. WILLIAM JOHN GEIMEIER (M.D.) based on available NPPES addresses.
How can I contact DR. WILLIAM JOHN GEIMEIER (M.D.)?
Phone or fax may appear on the official NPI record when supplied — verify before relying on them.

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