Dean A Delmastro, MD

University	Degree	Focus	Graduated
Rush Medical College of Rush University, Chicago Il	Other Degree		1988
Rush Medical College of Rush University Medical Center	Medical Degree		1988

Institution	Focus	Year
Internship - University South Ala		1989
Residency - University of North Carolina Hospitals Program		Not Specified
Residency - University Of Nc Hosps, Hematology/Oncology; University Of So Al Hosps, Internal Medicine		Not Specified

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Review by Anonymous on May 14, 2026 -

Marshfield Medical Center-Eau Claire Cancer Center - 2200 CRAIG ROAD

Office & Staff Evaluation

Practice Evaluation

Ease of Getting an Appointment Not rated
Courtesy of Practice Staff Not rated
Appearance & Atmosphere of Office Not rated
Handling of Billing & Insurance Not rated
Average Wait Time Not rated

Provider Evaluation

Willingness to Spend Time with You Not rated
Listening Skills
Clear explanations
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ Dr DelMastro was excellent!... ”

Dr DelMastro was excellent!

Verified Patient

“Dr DelMastro was excellent!...”

Dr DelMastro was excellent!

Anonymous 05/14/2026

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Review by Anonymous on March 02, 2026 -

Marshfield Medical Center-Eau Claire Cancer Center - 2200 CRAIG ROAD

Office & Staff Evaluation

Practice Evaluation

Ease of Getting an Appointment Not rated
Courtesy of Practice Staff Not rated
Appearance & Atmosphere of Office Not rated
Handling of Billing & Insurance Not rated
Average Wait Time Not rated

Provider Evaluation

Willingness to Spend Time with You Not rated
Listening Skills
Clear explanations
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ Dr. Delmastro is an amazing Doct... ”

Dr. Delmastro is an amazing Doctor. I am so grateful for his care.

Verified Patient

“Dr. Delmastro is an amazing Doct...”

Dr. Delmastro is an amazing Doctor. I am so grateful for his care.

Anonymous 03/02/2026

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Review by Anonymous on February 21, 2026 -

Marshfield Medical Center-Eau Claire Cancer Center - 2200 CRAIG ROAD

Office & Staff Evaluation

Practice Evaluation

Ease of Getting an Appointment Not rated
Courtesy of Practice Staff Not rated
Appearance & Atmosphere of Office Not rated
Handling of Billing & Insurance Not rated
Average Wait Time Not rated

Provider Evaluation

Willingness to Spend Time with You Not rated
Listening Skills
Clear explanations
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ I didn't get her name, but Dr. D... ”

I didn't get her name, but Dr. Delmastro's PA was just wonderful. I saw both her and Dr. Delmastro.

Verified Patient

“I didn't get her name, but Dr. D...”

I didn't get her name, but Dr. Delmastro's PA was just wonderful. I saw both her and Dr. Delmastro.

Anonymous 02/21/2026

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Review by Anonymous on September 15, 2025 -

Marshfield Medical Center-Eau Claire Cancer Center - 2200 CRAIG ROAD

Office & Staff Evaluation

Practice Evaluation

Ease of Getting an Appointment Not rated
Courtesy of Practice Staff Not rated
Appearance & Atmosphere of Office Not rated
Handling of Billing & Insurance Not rated
Average Wait Time Not rated

Provider Evaluation

Willingness to Spend Time with You Not rated
Listening Skills
Clear explanations
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ Very good doctor. Explains thing... ”

Very good doctor. Explains things well. He has great communication skills.

Verified Patient

“Very good doctor. Explains thing...”

Very good doctor. Explains things well. He has great communication skills.

Anonymous 09/15/2025

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Review by Anonymous on August 18, 2025 -

Marshfield Medical Center-Eau Claire Cancer Center - 2200 CRAIG ROAD

Office & Staff Evaluation

Practice Evaluation

Ease of Getting an Appointment Not rated
Courtesy of Practice Staff Not rated
Appearance & Atmosphere of Office Not rated
Handling of Billing & Insurance Not rated
Average Wait Time Not rated

Provider Evaluation

Willingness to Spend Time with You Not rated
Listening Skills
Clear explanations
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ Always concerned and very caring... ”

Always concerned and very caring.

Verified Patient

“Always concerned and very caring...”

Always concerned and very caring.

Anonymous 08/18/2025

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Review by Anonymous on April 23, 2026 -

Marshfield Medical Center-Eau Claire Cancer Center - 2200 CRAIG ROAD

Office & Staff Evaluation

Practice Evaluation

Ease of Getting an Appointment Not rated
Courtesy of Practice Staff Not rated
Appearance & Atmosphere of Office Not rated
Handling of Billing & Insurance Not rated
Average Wait Time Not rated

Provider Evaluation

Willingness to Spend Time with You Not rated
Listening Skills
Clear explanations
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ Went well even though wasn't nor... ”

Went well even though wasn't normal provider. We were able to figure things out. And felt super at ease with everything.

Verified Patient

“Went well even though wasn't nor...”

Went well even though wasn't normal provider. We were able to figure things out. And felt super at ease with everything.

Anonymous 04/23/2026

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Review by Anonymous on February 23, 2026 -

Marshfield Medical Center-Eau Claire Cancer Center - 2200 CRAIG ROAD

Office & Staff Evaluation

Practice Evaluation

Ease of Getting an Appointment Not rated
Courtesy of Practice Staff Not rated
Appearance & Atmosphere of Office Not rated
Handling of Billing & Insurance Not rated
Average Wait Time Not rated

Provider Evaluation

Willingness to Spend Time with You Not rated
Listening Skills
Clear explanations
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ Dean always explains things and ... ”

Dean always explains things and asks what I think about treatments or scans. ...

Verified Patient

“Dean always explains things and ...”

Dean always explains things and asks what I think about treatments or scans. ...

Anonymous 02/23/2026

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Review by Anonymous on September 18, 2025 -

Marshfield Medical Center-Eau Claire Cancer Center - 2200 CRAIG ROAD

Office & Staff Evaluation

Practice Evaluation

Ease of Getting an Appointment Not rated
Courtesy of Practice Staff Not rated
Appearance & Atmosphere of Office Not rated
Handling of Billing & Insurance Not rated
Average Wait Time Not rated

Provider Evaluation

Willingness to Spend Time with You Not rated
Listening Skills
Clear explanations
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ I am at Marshfield Clinic becaus... ”

I am at Marshfield Clinic because I wanted Dr Delmastro as my cancer doctor. He is a wonderful man & doctor.

Verified Patient

“I am at Marshfield Clinic becaus...”

I am at Marshfield Clinic because I wanted Dr Delmastro as my cancer doctor. He is a wonderful man & doctor.

Anonymous 09/18/2025

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Review by Anonymous on August 26, 2025 -

Marshfield Medical Center-Eau Claire Cancer Center - 2200 CRAIG ROAD

Office & Staff Evaluation

Practice Evaluation

Ease of Getting an Appointment Not rated
Courtesy of Practice Staff Not rated
Appearance & Atmosphere of Office Not rated
Handling of Billing & Insurance Not rated
Average Wait Time Not rated

Provider Evaluation

Willingness to Spend Time with You Not rated
Listening Skills
Clear explanations
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ Very nice dr. to work with you f... ”

Very nice dr. to work with you feel ilke he is treating someone in his family. Love Dr. Delmastro!!

Verified Patient

“Very nice dr. to work with you f...”

Very nice dr. to work with you feel ilke he is treating someone in his family. Love Dr. Delmastro!!

Anonymous 08/26/2025

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Review by Anonymous on July 30, 2025 -

Marshfield Medical Center-Eau Claire Cancer Center - 2200 CRAIG ROAD

Office & Staff Evaluation

Practice Evaluation

Ease of Getting an Appointment Not rated
Courtesy of Practice Staff Not rated
Appearance & Atmosphere of Office Not rated
Handling of Billing & Insurance Not rated
Average Wait Time Not rated

Provider Evaluation

Willingness to Spend Time with You Not rated
Listening Skills
Clear explanations
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ Not my normal dr., but liked him... ”

Not my normal dr., but liked him!

Verified Patient

“Not my normal dr., but liked him...”

Not my normal dr., but liked him!

Anonymous 07/30/2025

Office Hours

Internal Medicine Physician - Medical Oncology

Biography

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Summary

Provider Training

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Specialties

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Medical Specialties

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Reviews

Office & Staff Evaluation Not rated

Provider Evaluation

Locations

Affiliated Practices

Marshfield Medical Center-Eau Claire Cancer Center

Practice Colleagues

Taylor Effertz, NP - Nurse Practitioner

Danielle Dahlberg, NP - Nurse Practitioner

Dr Patcharin Tanawattanacharoen, MD - Internal Medicine Physician

Dr Michael Fallon, MD - Radiation Oncologist

Kira Musial, PA-C - Physician Assistant

Procedures & Services

Procedures & Treatments Offered

Commonly Prescribed Medications

Accepted Insurance

Accepted Insurance