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Dr. Hahm was born in West Islip, NY. Dr. Hahm received a Bachelor of Science degree in pharmacy from the State University of New York in Buffalo. She continued her education at the State University of New York, Roswell Park Cancer Institute and received a Ph.D. in Pharmacology, in June 1988.
Dr. Hahm went on to do all her medical training at Johns Hopkins School of Medicine. She graduated with honors from medical school in 1992, then went on to complete an internal medicine residency and a fellowship in medical oncology at Johns Hopkins.
Upon completion of her fellowship training, Dr. Hahm joined Northwest Georgia Oncology Centers, P.C. in Marietta where she continues to date. Her practice encompasses patients with a broad spectrum of oncology and hematology disorders, but she has a special interest in the treatment of patients with breast cancer.
Dr. Hahm is board certified in Internal Medicine and Medical Oncology.
Meet Dr. Hillary Hahm
Specialties
Hematology/Oncology
Medical Oncology
Education & Training
Johns Hopkins University
Degree
Doctor of Medicine
Residency
Johns Hopkins University Program
Fellowship
Johns Hopkins Hospital
Certifications
American Board of Internal Medicine
American Board of Internal Medicine - Onc
Hospital Affiliations
Wellstar Cobb Hospital
Wellstar Kennestone Hospital
Wellstar Douglas Hospital
Wellstar Paulding Medical Center
Wellstar North Fulton Hospital
Wellstar Spalding Regional Hospital
Wellstar West Georgia Medical Center
Languages spoken
English
Videos
Wellstar and Northwest Georgia Oncology Centers (NGOC) extend world-class, compassionate cancer care to the whole patient family
Patient Reviews
Overall patient rating
4.9
Based on 30 patient ratings
I'd recommend this provider to family and friends
I'd recommend this practice to family and friends
Listened to me carefully
Explained things clearly
Earned my trust
Shared the right amount of information
All reviews have been submitted by patients after seeing the provider.For more information about the review system, check out this Learn more about our review system.
Patient Reviews
5
All my interactions with this practice has been excellent. I've received good advice as to what was needed, and agreed. I feel better than I did for some time, so the treatments I received were beneficial. Follow-up has been excellent, and I am very pleased
May 24, 2026
5
Dr. Hahm was spectacular: extremely knowledgeable, helpful and caring. However a few weeks earlier I was trying to get surgical clearance and had some timing issues. But this had nothing to do with Dr. Hahm. She was great!
May 17, 2026
4
I waited over 2 hours in a freezing cold examination room. They should have let me know in advance and told me to go and rescheduled. Two hours is too long by far to keep a patient sequestered.
April 30, 2026
5
The doctor I saw was very knowledgeable and explained everything I was very satisfied with this visit
July 13, 2025
5
Sorry to see Dr.Hahm retire
March 9, 2025
5
The whole staff was extremely helpful,pleasant , friendly and kind
March 10, 2025
5
My medical appointment was great and I will miss Dr. Hahm tremendously. She is wonderful! My only complaint is with the parking at the hospital campus. It is terrible and takes a lot of time to find a space! Something needs to be done!
March 3, 2025
5
Dr. Hahm is one of the best, most thorough doctors that I have ever been to. She explains everything, and if she feels like you don't understand, she'll explain it in another way. She's very thorough, and I just feel completely cared for in her hands. So that's my feeling about seeing Dr. Hahm , and her staff are wonderful, too. So that's all. Thank you.
March 2, 2025
5
Dr. Hahm is just wonderful. I will miss her.
March 1, 2025
5
Dr Hahm is going to be missed. She took excellent care of me and always gave me the time I needed.
March 1, 2025
5
Dr. Hahm is a wonderful lady. Excellent Dr and just a great person over all. I wish her the best in her retirement. She will be missed!
February 27, 2025
5
Dr Hahm and her team have been spot on with my care from day one! Always personable, patient, informative and caring. I will miss her tremendously!
February 24, 2025
5
All my interactions with this practice has been excellent. I've received good advice as to what was needed, and agreed. I feel better than I did for some time, so the treatments I received were beneficial. Follow-up has been excellent, and I am very pleased
May 24, 2026
5
Dr. Hahm was spectacular: extremely knowledgeable, helpful and caring. However a few weeks earlier I was trying to get surgical clearance and had some timing issues. But this had nothing to do with Dr. Hahm. She was great!
May 17, 2026
5
The doctor I saw was very knowledgeable and explained everything I was very satisfied with this visit
July 13, 2025
5
Sorry to see Dr.Hahm retire
March 9, 2025
5
The whole staff was extremely helpful,pleasant , friendly and kind
March 10, 2025
5
My medical appointment was great and I will miss Dr. Hahm tremendously. She is wonderful! My only complaint is with the parking at the hospital campus. It is terrible and takes a lot of time to find a space! Something needs to be done!
March 3, 2025
5
Dr. Hahm is one of the best, most thorough doctors that I have ever been to. She explains everything, and if she feels like you don't understand, she'll explain it in another way. She's very thorough, and I just feel completely cared for in her hands. So that's my feeling about seeing Dr. Hahm , and her staff are wonderful, too. So that's all. Thank you.
March 2, 2025
5
Dr. Hahm is just wonderful. I will miss her.
March 1, 2025
5
Dr Hahm is going to be missed. She took excellent care of me and always gave me the time I needed.
March 1, 2025
5
Dr. Hahm is a wonderful lady. Excellent Dr and just a great person over all. I wish her the best in her retirement. She will be missed!
February 27, 2025
5
Dr Hahm and her team have been spot on with my care from day one! Always personable, patient, informative and caring. I will miss her tremendously!
February 24, 2025
4
I waited over 2 hours in a freezing cold examination room. They should have let me know in advance and told me to go and rescheduled. Two hours is too long by far to keep a patient sequestered.
April 30, 2026
4
I waited over 2 hours in a freezing cold examination room. They should have let me know in advance and told me to go and rescheduled. Two hours is too long by far to keep a patient sequestered.
April 30, 2026
5
All my interactions with this practice has been excellent. I've received good advice as to what was needed, and agreed. I feel better than I did for some time, so the treatments I received were beneficial. Follow-up has been excellent, and I am very pleased
May 24, 2026
5
Dr. Hahm was spectacular: extremely knowledgeable, helpful and caring. However a few weeks earlier I was trying to get surgical clearance and had some timing issues. But this had nothing to do with Dr. Hahm. She was great!
May 17, 2026
5
The doctor I saw was very knowledgeable and explained everything I was very satisfied with this visit
July 13, 2025
5
Sorry to see Dr.Hahm retire
March 9, 2025
5
The whole staff was extremely helpful,pleasant , friendly and kind
March 10, 2025
5
My medical appointment was great and I will miss Dr. Hahm tremendously. She is wonderful! My only complaint is with the parking at the hospital campus. It is terrible and takes a lot of time to find a space! Something needs to be done!
March 3, 2025
5
Dr. Hahm is one of the best, most thorough doctors that I have ever been to. She explains everything, and if she feels like you don't understand, she'll explain it in another way. She's very thorough, and I just feel completely cared for in her hands. So that's my feeling about seeing Dr. Hahm , and her staff are wonderful, too. So that's all. Thank you.
March 2, 2025
5
Dr. Hahm is just wonderful. I will miss her.
March 1, 2025
5
Dr Hahm is going to be missed. She took excellent care of me and always gave me the time I needed.
March 1, 2025
5
Dr. Hahm is a wonderful lady. Excellent Dr and just a great person over all. I wish her the best in her retirement. She will be missed!
February 27, 2025
5
Dr Hahm and her team have been spot on with my care from day one! Always personable, patient, informative and caring. I will miss her tremendously!
February 24, 2025
5
All my interactions with this practice has been excellent. I've received good advice as to what was needed, and agreed. I feel better than I did for some time, so the treatments I received were beneficial. Follow-up has been excellent, and I am very pleased
May 24, 2026
5
Dr. Hahm was spectacular: extremely knowledgeable, helpful and caring. However a few weeks earlier I was trying to get surgical clearance and had some timing issues. But this had nothing to do with Dr. Hahm. She was great!
May 17, 2026
4
I waited over 2 hours in a freezing cold examination room. They should have let me know in advance and told me to go and rescheduled. Two hours is too long by far to keep a patient sequestered.
April 30, 2026
5
The doctor I saw was very knowledgeable and explained everything I was very satisfied with this visit
July 13, 2025
5
The whole staff was extremely helpful,pleasant , friendly and kind
March 10, 2025
5
Sorry to see Dr.Hahm retire
March 9, 2025
5
My medical appointment was great and I will miss Dr. Hahm tremendously. She is wonderful! My only complaint is with the parking at the hospital campus. It is terrible and takes a lot of time to find a space! Something needs to be done!
March 3, 2025
5
Dr. Hahm is one of the best, most thorough doctors that I have ever been to. She explains everything, and if she feels like you don't understand, she'll explain it in another way. She's very thorough, and I just feel completely cared for in her hands. So that's my feeling about seeing Dr. Hahm , and her staff are wonderful, too. So that's all. Thank you.
March 2, 2025
5
Dr Hahm is going to be missed. She took excellent care of me and always gave me the time I needed.
March 1, 2025
5
Dr. Hahm is just wonderful. I will miss her.
March 1, 2025
5
Dr. Hahm is a wonderful lady. Excellent Dr and just a great person over all. I wish her the best in her retirement. She will be missed!
February 27, 2025
5
Dr Hahm and her team have been spot on with my care from day one! Always personable, patient, informative and caring. I will miss her tremendously!
February 24, 2025
5
Dr Hahm and her team have been spot on with my care from day one! Always personable, patient, informative and caring. I will miss her tremendously!
February 24, 2025
5
Dr. Hahm is a wonderful lady. Excellent Dr and just a great person over all. I wish her the best in her retirement. She will be missed!
February 27, 2025
5
Dr. Hahm is just wonderful. I will miss her.
March 1, 2025
5
Dr Hahm is going to be missed. She took excellent care of me and always gave me the time I needed.
March 1, 2025
5
Dr. Hahm is one of the best, most thorough doctors that I have ever been to. She explains everything, and if she feels like you don't understand, she'll explain it in another way. She's very thorough, and I just feel completely cared for in her hands. So that's my feeling about seeing Dr. Hahm , and her staff are wonderful, too. So that's all. Thank you.
March 2, 2025
5
My medical appointment was great and I will miss Dr. Hahm tremendously. She is wonderful! My only complaint is with the parking at the hospital campus. It is terrible and takes a lot of time to find a space! Something needs to be done!
March 3, 2025
5
Sorry to see Dr.Hahm retire
March 9, 2025
5
The whole staff was extremely helpful,pleasant , friendly and kind
March 10, 2025
5
The doctor I saw was very knowledgeable and explained everything I was very satisfied with this visit
July 13, 2025
4
I waited over 2 hours in a freezing cold examination room. They should have let me know in advance and told me to go and rescheduled. Two hours is too long by far to keep a patient sequestered.
April 30, 2026
5
Dr. Hahm was spectacular: extremely knowledgeable, helpful and caring. However a few weeks earlier I was trying to get surgical clearance and had some timing issues. But this had nothing to do with Dr. Hahm. She was great!
May 17, 2026
5
All my interactions with this practice has been excellent. I've received good advice as to what was needed, and agreed. I feel better than I did for some time, so the treatments I received were beneficial. Follow-up has been excellent, and I am very pleased
May 24, 2026
Hillary Hahm, MD
Hematologist/Oncologist affiliated with Wellstar since 2000
