Physician Profile
Willis J. Rieker, M.D.
Unclaimed ProfileAbout Dr. Rieker
Willis J. Rieker, M.D. practices cytopathology in Beloit, WI. Willis is a 1984 graduate of Loyola University of Chicago, Stritch School of Medicine. Willis is also listed as specializing in anatomic & clinical pathology. According to Medicare claims data, Willis cared for 994 Medicare patients across 2,426 services. The services billed most often include pathology examination of tissue using a microscope, intermediate complexity, special stained specimen slides to examine tissue including interpretation and report, and pathology examination of tissue using a microscope, intermediate complexity.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Contact Information
- (608) 364-5131
- Email not available
Practice Locations
1969 W HART RD
Beloit, WI 53511
Conditions Evaluated or Diagnosed
Within Pathology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Autoimmune & Joints
- Rheumatoid arthritis
Autopsy & Forensic
- Unexplained Cause of Death
Blood & Metabolism
- Vitamin D deficiency
Blood Disorders
- Bleeding Disorders
- Blood Clotting Gene Mutation
- Iron-deficiency anemia
- Leukemia
- Lymphoma
- Multiple Myeloma
- Sickle cell disease
Cancer
- Bladder cancer
- Bone tumors
- Brain tumor
- Breast cancer
- Cervical cancer
- Colon cancer
- Endometrial cancer
- Kidney cancer
- Liver cancer
- Lung cancer
- Oral cavity cancer
- Ovarian cancer
- Pancreatic cancer
- Prostate cancer
- Soft-tissue sarcoma
- Stomach cancer
- Testicular cancer
- Thyroid cancer
Cervical & Gynecologic
- Abnormal cervical cells and cervical dysplasia
- Endometrial hyperplasia
Digestive
- Gallbladder inflammation
- H. pylori infection
Digestive System
- Barrett's esophagus
- Celiac disease
- Colon polyps
Endocrine
- Thyroid nodules
Genetics
- Inherited Cancer Risk
Hormones
- Testosterone deficiency
Immune System
- Autoimmune Diseases
Infections
- Hepatitis C
- Lyme disease
- Mononucleosis
- Sexually transmitted infections
Kidney
- Kidney Disease
Liver
- Metabolic dysfunction-associated steatohepatitis
Metabolic & Routine Lab
- Diabetes
- Gout
- High cholesterol
Pregnancy & Fertility
- Recurrent miscarriage
Skin Cancer
- Melanoma
- Moles and atypical moles
- Skin cancer
Women's Health
- Endometriosis
- Uterine fibroids
Procedures & services
Autopsy & Forensic
- Private Autopsy Service
Blood Tests
- Blood Clotting Tests
- Blood Type Test
- Cholesterol screening
- Complete Blood Count
- Comprehensive Metabolic Panel
- Hemoglobin A1c Test
- Iron Level Blood Test
- Thyroid Blood Test
Cytology
- Body fluid cytology
- Urine cytology test
Cytology & Screening
- Fine-needle aspiration of a neck mass
- Human papillomavirus testing
- Pap Smear Test
- Thyroid Nodule Biopsy Review
Genetic & Molecular Tests
- Cancer Genetic Testing
- Liquid Biopsy
- Paternity DNA Test
- Tumor Biomarker Testing
Genetics
- Chromosome And Genetic Testing
Immune & Allergy Tests
- Allergy Blood Testing
- Autoimmune Antibody Panel
- Celiac Disease Blood Test
Infection Testing
- Blood Culture Test
- H. Pylori Breath Test
- Lyme disease test
Infection Tests
- STI Screening Panel
Lab & Blood Tests
- Cardiac enzyme blood test
- Pregnancy blood test
- Sed rate inflammation test
- Testosterone blood test
- Vitamin D blood test
Pathology Review
- Biopsy Second Opinion
- Frozen Section During Surgery
Pregnancy & Fertility
- Miscarriage tissue testing
- Placenta examination
- Sperm count test
Routine Lab Tests
- Colon cancer screening consult
- Urinalysis
- Urine Drug Screen
Tissue Biopsy
- Bone Marrow Biopsy Interpretation
- Breast Biopsy Analysis
- Cervical biopsy lab review
- Colon Polyp Testing
- Kidney Biopsy Examination
- Liver Biopsy Examination
- Lung biopsy lab review
- Lymph Node Biopsy Analysis
- Oral biopsy lab review
- Prostate Biopsy Analysis
- Skin Biopsy Lab Review
- Stomach biopsy lab review
- Uterine biopsy lab review
Procedures Most Often Billed to Medicare
2,426 services · 994 patients · 17 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Pathology examination of tissue using a microscope, intermediate complexity | Lab test | 88305 |
997 |
| Special stained specimen slides to examine tissue including interpretation and report | Lab test | 88313 |
394 |
| Pathology examination of tissue using a microscope, intermediate complexity | Lab test | 88305 |
232 |
| Special stained specimen slides to identify organisms including interpretation and report | Lab test | 88312 |
199 |
| Special stained specimen slides to examine tissue, each additional procedure | Lab test | 88341 |
81 |
| Special stained specimen slides to examine tissue, each multiplex procedure | Lab test | 88344 |
80 |
| Cell examination of specimen, concentration technique | Lab test | 88108 |
80 |
| Special stained specimen slides to examine tissue, initial procedure | Lab test | 88342 |
72 |
| Pathology examination of specimen during surgery, first tissue block | Lab test | 88331 |
70 |
| Pathology examination of tissue using a microscope, limited examination | Lab test | 88300 |
54 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Class of 1984 at Loyola University of Chicago, Stritch School of Medicine 8
Providers who graduated from the same medical school in the same year.
Common questions
What is Willis J. Rieker's specialty?
Willis J. Rieker is a cytopathology in Beloit, WI. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where can I find Willis J. Rieker?
Willis J. Rieker is listed at 1969 W Hart Rd, Beloit, WI 53511. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Willis J. Rieker?
The number on file is (608) 364-5131. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Willis J. Rieker's NPI number?
Willis J. Rieker's National Provider Identifier is 1689714834. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Willis J. Rieker's education?
Willis J. Rieker attended Loyola University of Chicago, Stritch School of Medicine, graduating in 1984. This comes from the CMS National Downloadable File.
CMS public data
How long has Willis J. Rieker been practicing?
Willis J. Rieker has 42 years experience. Calculated from a graduation year of 1984, reported in the CMS National Downloadable File.
CMS public data
What is Willis J. Rieker known for?
According to Medicare billing data, Willis J. Rieker the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Willis J. Rieker confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Willis J. Rieker. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.