TIMOTHY G TIMMERMAN (M.D.) – Anatomic Pathology & Clinical Pathology Physician, NPI 1265405781

TIMOTHY G TIMMERMAN (M.D.) is a healthcare provider. based in Dubuque, Iowa. specializing in PATHOLOGY. They hold the professional credentials M.D.. They hold a License No. 31521 (IA). The NPI Number for TIMOTHY G TIMMERMAN (M.D.) is 1265405781

Main info

Male
34 Years Of Experience
Accepts Medicare Assignment
Name
TIMOTHY G TIMMERMAN (M.D.)
NPI
1265405781
Phone
(563) 589-8616
Address
250 MERCY DR
Enumeration Date
8 February 2006
Last Update Date
31 July 2013

Doctor Profile

Medical School Name
UNIVERSITY OF IOWA, RJ & L CARVER COLLEGE OF MEDICINE
Secondary Phone
5635898000
Graduation Year
1992 (34 years ago)
PAC ID
8729098157
Group Practice PAC ID
2668467168
Professional Enrollment ID
I20060501000407
Address ID
IA520017320DU250XXDRXX300
Data current as of
19 May 2026

Profile Insights

NPPES metrics only — not quality of care.

Methodology
Experience59
Completeness75
Years active:20State licenses:1Digital endpointsOther names

190 PATHOLOGY in IA

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Provider Addresses for TIMOTHY G TIMMERMAN (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) 589-8616

    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)

CMS reports 2 Open Payments records for all available years, with a total value of $39.

Total Amount is formed as General ($39) + Research ($0) + Ownership ($0) = $39.

Last reported payment date: 2024-12-11 • Largest payer in this snapshot: Becton, Dickinson and Company ($24).

Total Amount

$39

General + Research + Ownership

Payments

2

Total payment records

General Amount

$39

General payments

Research Amount

$0

Research funding

Ownership Amount

$0

Ownership interests

Ownership Count

0

Ownership records

Last Payment Date

2024-12-11

Latest reported date

Top Companies

Largest payers in this snapshot

View all Open Payments →|Open Payments Risk Radar →

Medicare Enrollment & Revalidation

Source: CMS public data · Not endorsed by CMS ·

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

PECOS enrollment status

Participating (accepts Medicare assignment)

Enrollment effective: 2006-05-01

PECOS data refreshed: 2026-05-27

Medicare revalidation (CMS due date list)

Due date not assigned yet

CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.

Enrollment records

1

Earliest due date

Not assigned (TBD)

CMS data updated

2026-06-01

Revalidation progress

  1. Medicare enrolled
  2. On CMS revalidation list
  3. Due date assigned
  4. Revalidate in PECOS

CMS enrollment records

Enrollment IDTypeSpecialtyStateDue date
I20060501000407IPathologyIATBD

What to do next

  • No action required while the due date shows TBD.
  • Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
  • Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.

Verify on CMS Revalidation Lookup Tool

Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS

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 52004)

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Provider's Procedures

TIMOTHY G TIMMERMAN (M.D.) performs procedures in PATHOLOGY. See the list of HCPCS codes below.
SpecialtyPractice State
HCPCS Code
Description
Service Count
Beneficiary Count
PATHOLOGYIA88304Pathology examination of tissue using a microscope, moderately low complexity4019
PATHOLOGYIA88342Tissue or cell analysis by immunologic technique3727

Group practice members

Group practice members are other physicians who share the same Group Practice PAC ID with this doctor. When doctors form a group practice and register in PECOS as a single entity, they receive a shared identification number. This table lists all providers in the same group practice.
PAC ID: 2668467168View full group profile
NameSpecialtyState
Physical Medicine And RehabilitationIA
Sleep MedicineIA
Nurse PractitionerIL
Physician AssistantIA
Radiation OncologyAL
Nurse PractitionerIA
N E U R O L O G YNC
P A T H O L O G YAE
Radiation OncologyPA
Psychiatry, Addiction MedicineIA

Reviews

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Frequently asked questions

Can I verify TIMOTHY G TIMMERMAN (M.D.) with an NPI only?
You can start verification with NPI 1265405781 for TIMOTHY G TIMMERMAN (M.D.), then check state licensing separately.
Can I rely on TIMOTHY G TIMMERMAN (M.D.) being an active provider?
As of the registry snapshot, TIMOTHY G TIMMERMAN (M.D.) is marked active.
What healthcare role does TIMOTHY G TIMMERMAN (M.D.) hold?
Scheduling teams often label TIMOTHY G TIMMERMAN (M.D.) under Anatomic Pathology & Clinical Pathology Physician. Clinical services aligned with this taxonomy classification.
What area does TIMOTHY G TIMMERMAN (M.D.) serve?
TIMOTHY G TIMMERMAN (M.D.)'s listing highlights Dubuque, Iowa; more addresses can appear in NPPES.
Why does TIMOTHY G TIMMERMAN (M.D.) have multiple addresses?
2 practice locations appear in the available data. Multiple addresses are common for hospital privileges, telehealth, or multi-site groups.

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