TIMOTHY G TIMMERMAN M.D.
NPI 1265405781
Pathology - Anatomic Pathology & Clinical Pathology in Dubuque, IA

Q: What is Timothy Timmerman's NPI number?

The NPI number for Timothy Timmerman is 1265405781. It was assigned to this individual provider in the NPPES registry on February 8, 2006.

Q: What is Timothy Timmerman's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology & Clinical Pathology, with taxonomy code 207ZP0102X.

Q: When was this NPI record last updated?

The NPPES record for Timothy Timmerman was last updated on July 31, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since February 08, 2006PECOS EnrolledAccepts Medicare Assignment

250 MERCY DR, DUBUQUE, IA 52004(563) 589-9615 Get Directions Write a Review

NPPES record last updated: July 31, 2013. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Timothy G Timmerman M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

TIMOTHY G TIMMERMAN M.D. (NPI 1265405781) is an individual anatomic pathology & clinical pathology provider in Dubuque, Iowa, licensed in Iowa (31521) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS, is affiliated with Mercyone Dubuque Medical Center, and is a graduate of University Of Iowa, Rj & L Carver College Of Medicine (1992).

NPPES Registry Identity

NPI1265405781

Entity TypeIndividualMale

Primary Taxonomy207ZP0102X

Provider Legal NameTIMOTHY G TIMMERMANCredential: M.D.

Location Address250 MERCY DRDubuque, IA 52004-0731

Mailing Address250 Mercy Dr, P O Box 731Dubuque, IA 52004-0731 · (563) 589-8616

Phone(563) 589-9615

Sole ProprietorNo

Medical School CMSUniversity Of Iowa, Rj & L Carver College Of MedicineGraduated 1992

Enumeration DateFebruary 8, 2006

Last NPPES UpdateJuly 31, 2013

✔ NPI 1265405781 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPathology · Anatomic Pathology & Clinical PathologyAllopathic & Osteopathic Physicians

Taxonomy Code207ZP0102X

License✔ Licensed in IA · 31521

Definition

A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.

Also ListedPathology · CytopathologyTaxonomy 207ZC0500X · License 31521 (IA)

250 MERCY DR, Dubuque, IA 52004

Open in Google Maps ↗

Other Identifiers 2

Other40613IA · Bcbs Provider Number

Medicare PINI2136IA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Insurance Company, Wellmark Health Plan of Iowa, Inc..Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Timothy G Timmerman M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID8729098157

PECOS Enrollment IDI20060501000407

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Timothy Timmerman reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Mercy Medical Center-Dubuque

Same address

General Acute Care Hospital

250 MERCY DR
Dubuque, IA 52001

Reassigned Medicare billing, Iowa enrollment
94 clinicians in this Medicare group

NPI 1659348506 (563) 589-8000

Mercy Medical Center-Dyersville

23 mi

Critical Access

1111 3RD ST SW
Dyersville, IA 52040

Reassigned Medicare billing, Iowa enrollment
62 clinicians in this Medicare group

NPI 1205816725 (563) 875-7101

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 32

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Pathology examination of tissue using a microscope, intermediate complexity 88305

A pathology examination of tissue with intermediate complexity involves studying a small sample of your body tissue under a microscope. This helps in identifying any abnormal cells or signs of disease. It's a detailed process requiring expert analysis to ensure accurate results.

1,445 services798 patients

Pathology examination of tissue using a microscope, intermediate complexity 88305

717 services345 patients

Special stained specimen slides to examine tissue, each additional procedure 88341

Special stained specimen slides are used to analyze tissue in detail. In this process, extra procedures may be needed for a more thorough examination. These involve applying special stains to the tissue on slides, enhancing specific elements for closer study.

227 services59 patients

Cell examination of specimen, selective cellular enhancement technique 88112

Cell examination of a specimen using selective cellular enhancement technique is a lab process that improves the visibility of certain cells in a sample. It helps in identifying abnormalities or diseases. The process is non-invasive, safe, and aids in accurate diagnosis.

169 services133 patients

Special stained specimen slides to examine tissue, initial procedure 88342

This procedure involves the use of specially stained slides to examine tissue samples. The initial process involves obtaining a small tissue sample from your body. This sample is then placed on a slide and stained with special dyes to highlight different structures and elements. The stained slide is then examined under a microscope to help diagnose any potential health issues.

136 services102 patients

Pathology examination of tissue using a microscope, moderately high complexity 88307

A pathology examination of tissue with moderate complexity involves a detailed study of a small tissue sample from your body. Using a microscope, experts analyze the tissue's structure and cells to identify any abnormalities. This helps in diagnosing various health conditions accurately.

134 services83 patients

Special stained specimen slides to examine tissue, initial procedure 88342

129 services110 patients

Special stained specimen slides to examine tissue, each multiplex procedure 88344

Special stained specimen slides are used to study tissue in detail. This multiplex procedure involves applying different dyes to the tissue sample on a slide to highlight specific elements. These colors help identify any abnormalities in the tissue, aiding in accurate diagnosis and treatment planning.

115 services31 patients

Special stained specimen slides to examine tissue, each additional procedure 88341

109 services37 patients

Pathology examination of tissue using a microscope, moderately low complexity 88304

A pathology examination of tissue, moderately low complexity, involves studying a small sample of your body tissue under a microscope. It helps to identify any abnormal cells or diseases. It's a routine procedure, not complex, and provides crucial insights for your diagnosis.

72 services67 patients

Pathology examination of specimen during surgery, first tissue block 88331

A pathology examination during surgery involves the immediate analysis of a removed tissue sample. This helps the surgeon make decisions during your operation. The "first tissue block" refers to the initial sample examined. It's a vital step to ensure your health.

71 services52 patients

Cell examination of specimen, selective cellular enhancement technique 88112

68 services58 patients

Microscopic genetic analysis of tumor, using computer-assisted technology 88361

Microscopic genetic analysis of a tumor uses advanced computer technology to examine the genetic makeup of the tumor cells. This helps to understand the tumor better and tailor a treatment plan. It's a non-invasive procedure and provides valuable insights for your healthcare team.

54 services16 patients

Microscopic genetic analysis of tumor, using computer-assisted technology 88361

52 services12 patients

Pap test 88141

A Pap test is a routine exam that checks for changes in cells that could signal a health concern. During this test, a small sample of cells is gently collected from the lower region of the body. The sample is then examined under a microscope to ensure everything looks normal.

51 services50 patients

Pathology examination of tissue using a microscope, moderately low complexity 88304

44 services43 patients

Surgical pathology, gross and microscopic examinations, for prostate needle biopsy, any method G0416

This procedure involves taking a small tissue sample from your gland located beneath your bladder. The sample is then examined under a microscope by a pathologist to check for any abnormalities or diseases. This is a standard method to ensure your well-being.

41 services40 patients

Evaluation of fine needle aspirate with interpretation and report 88173

This procedure involves using a thin needle to collect a small sample from an abnormal area or lump. The sample is then examined under a microscope to identify any potential issues. A report of the findings is provided for further analysis.

36 services33 patients

Evaluation of fine needle aspirate 88172

Evaluation of fine needle aspirate is a diagnostic procedure where a thin needle is used to collect cells from a lump or mass. This sample is then examined under a microscope to determine the nature of the lump, whether it's benign (non-cancerous) or malignant (cancerous).

31 services29 patients

Evaluation of fine needle aspirate with interpretation and report 88173

31 services26 patients

Special stained specimen slides to examine tissue including interpretation and report 88313

Special stained specimen slides are used to examine tissue samples. This involves applying special dyes to the tissue, which helps to highlight certain features under a microscope. The findings are then interpreted and a report is provided. This can aid in diagnosing various health conditions.

30 services21 patients

Evaluation of fine needle aspirate 88172

29 services26 patients

Special stained specimen slides to identify organisms including interpretation and report 88312

This service involves coloring specimen slides in a special way to help identify organisms. The colors make different parts of the organism stand out. Afterward, a detailed interpretation and report on the findings are provided.

28 services19 patients

Preparation of tissue for examination by removing any calcium present 88311

This procedure involves treating tissue samples to remove any calcium, which can interfere with the examination. The tissue is soaked in a special solution that safely dissolves the calcium, leaving the tissue intact for accurate analysis. This helps in making precise diagnoses.

26 services21 patients

Special stained specimen slides to identify organisms including interpretation and report 88312

25 services20 patients

Preparation of tissue for examination by removing any calcium present 88311

23 services20 patients

Special stained specimen slides to examine tissue including interpretation and report 88313

23 services13 patients

Blood smear interpretation by physician with written report 85060

Blood smear interpretation is a lab test where your doctor examines a sample of your blood under a microscope. They look for abnormalities in your blood cells which can help diagnose various conditions. You'll receive a written report of the findings.

21 services18 patients

Pathology examination of specimen during surgery, first tissue block 88331

19 services12 patients

Bone marrow, smear interpretation 85097

Bone marrow smear interpretation is a procedure where a small sample of your bone marrow is taken and examined under a microscope. This helps doctors identify any abnormal cells or signs of diseases such as anemia, leukemia, or infections. It's a crucial step in diagnosing various blood disorders.

17 services15 patients

Pathology examination of tissue using a microscope, high complexity 88309

A high complexity pathology examination involves studying body tissue under a microscope to identify any abnormalities. This intricate process helps in diagnosing various conditions and deciding on the best treatment plan.

17 services17 patients

Examination of archival tissue for genetic analysis 88363

Examination of archival tissue for genetic analysis involves studying previously collected tissue samples. This process helps detect any genetic alterations that may be linked to certain diseases. It's a crucial step in understanding your health and planning appropriate treatments.

13 services12 patients

Hospital Affiliations CMS Care Compare 5

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Mercyone Dubuque Medical Center

Acute Care Hospitals · Dubuque, IA

5/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number160069

Location250 Mercy DriveDubuque, IA 52001 · Dubuque County

Emergency services Birthing friendly

Mercyone Clinton Medical Center

Acute Care Hospitals · Clinton, IA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number160080

Location1410 North 4th StreetClinton, IA 52732 · Clinton County

Emergency services Birthing friendly

Finley Hospital

Acute Care Hospitals · Dubuque, IA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number160117

Location350 North Grandview AvenueDubuque, IA 52001 · Dubuque County

Emergency services Birthing friendly

Mercyone Elkader Medical Center

Critical Access Hospitals · Elkader, IA

OwnershipVoluntary non-profit - Private

CMS Certification Number161319

Location901 Davidson Street NWElkader, IA 52043 · Clayton County

Emergency services

Mercyone Dyersville Medical Center

Critical Access Hospitals · Dyersville, IA

OwnershipVoluntary non-profit - Private

CMS Certification Number161378

Location1111 3rd Street SWDyersville, IA 52040 · Dubuque County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 52004 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$122.23 typical visit price

range $52.96 – $161.40

Typical copayment $30.55 (range $13.24 – $40.35)

Most-billed visit code 99204

Established Patient

$94.05 typical visit price

range $16.91 – $131.98

Typical copayment $23.51 (range $4.22 – $32.99)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 3

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

PATHOLOGY ASSOCIATES

Pathology (Anatomic Pathology & Clinical Pathology)

250 MERCY DR, ROOM G211
DUBUQUE, IA 52004

Dubuque County (563) 556-2012

CHRISTOPHER J LEIGH M.D.

Pathology (Anatomic Pathology & Clinical Pathology)

250 MERCY DR
DUBUQUE, IA 52004

Dubuque County (563) 589-9615

DANIEL D SLAGEL M.D.

Pathology (Anatomic Pathology & Clinical Pathology)

250 MERCY DR
DUBUQUE, IA 52004

Dubuque County (563) 589-9615

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Timothy Timmerman's NPI number?

The NPI number for Timothy Timmerman is 1265405781. It was assigned to this individual provider in the NPPES registry on February 8, 2006.

Where is Timothy Timmerman located?

Timothy Timmerman practices at 250 Mercy Dr, Dubuque, IA 52004. The listed phone number is (563) 589-9615.

What is Timothy Timmerman's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology & Clinical Pathology, with taxonomy code 207ZP0102X.

Is Timothy Timmerman enrolled in Medicare?

Yes. Timothy Timmerman is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Timothy Timmerman's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Timothy Timmerman reassigns Medicare benefits to 2 organizations: Mercy Medical Center-Dubuque (Dubuque, IA) and Mercy Medical Center-Dyersville (Dyersville, IA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Timothy Timmerman's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Timothy Timmerman accept?

Health plans from Oscar Insurance Company and Wellmark Health Plan of Iowa, Inc. list Timothy Timmerman as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Timothy Timmerman affiliated with any hospitals?

According to CMS data, Timothy Timmerman is affiliated with Mercyone Dubuque Medical Center, Mercyone Clinton Medical Center, Finley Hospital, Mercyone Elkader Medical Center and Mercyone Dyersville Medical Center.

When was this NPI record last updated?

The NPPES record for Timothy Timmerman was last updated on July 31, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.