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Northwest Georgia Oncology Centers Wellstar

340 Kennestone Hospital Boulevard
Suite 100
Marietta, GA 30060
Our Areas of Focus

Advanced cancer care

Access to state-of-the-art treatments and technology for your unique cancer diagnosis or blood disorder.

Partners in care

Trust our multidisciplinary team of cancer specialists to create the most effective care plan for you.

Solid second opinions

Get a second opinion and peace of mind so you can feel confident about your cancer treatment.

Groundbreaking clinical trials

Find new clinical trials, biomarker testing and targeted therapies without ever having to leave Georgia.

  • Northwest Georgia Oncology Centers Wellstar
  • About Us
  • Our Team
  • Info
(770) 281-5100 COVID-19 Info

Location


About Us

About Us

Wellstar Cancer Center building 340

As a service of Wellstar Cobb Hospital, Northwest Georgia Oncology Centers offers complete cancer care at multiple locations.

Patient-centered care by a team of cancer specialists

Our care plans for patients are truly patient-centered. Our team of leaders, researchers and innovators work together to select the best treatment option for each individual. We collaborate with specialists including oncology surgeons and radiation oncologists. The right treatment for an individual can include chemotherapy, immunotherapy, targeted therapies, radiation or cancer surgery. With our true multidisciplinary care model, we help patients achieve optimal clinical outcomes.

Cancer treatments & clinical trials

Working toward a cancer cure, we offer advanced treatments for various types of cancer, and patients at this location have access to clinical trials. The Wellstar Research Institute and Northwest Georgia Oncology Centers have a research program that provides cutting edge treatments to cancer patients in Georgia, often years before they are FDA-approved. Our research program has participated in trials leading most recently to the approval of immunotherapy and targeted therapies for a number of malignancies including breast cancer, lung cancer and kidney cancer.

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Office Location
340 Kennestone Hospital Boulevard
Suite 100
Marietta, GA 30060

Contact

Phone (770) 281-5100

Fax (678) 581-7100


Hours
Monday: 8:30 AM-5:00 PM Tuesday: 8:30 AM-5:00 PM Wednesday: 8:30 AM-5:00 PM Thursday: 8:30 AM-5:00 PM Friday: 8:30 AM-3:00 PM
Closed Opens 8:30 AM

(770) 281-5100 COVID-19 Info
Meet our Team

Hillary Hahm, MD

Hematologist/Oncologist affiliated with Wellstar since 2000.

Affiliate
Specialties
Hematology/Oncology
Learn More
Steven McCune, MD

Hematologist/Oncologist affiliated with Wellstar since 2001.

Affiliate
Specialties
Hematology/Oncology
Learn More
Walid Shaib, MD

Hematologist/Oncologist affiliated with Wellstar since 2018.

Affiliate
Specialties
Hematology/Oncology
Learn More
Aswani Thurlapati, MD

Hematologist/Oncologist affiliated with Wellstar since 2025.

Affiliate
Specialties
Hematology/Oncology
Learn More
Zulfiqar Malik, MD

Hematologist/Oncologist affiliated with Wellstar since 2022.

Affiliate
Specialties
Hematology/Oncology
Learn More
Sarah McCrea, NP

Nurse Practitioner affiliated with Wellstar since 2021.

Affiliate
Specialties
Hematology/Oncology
Learn More
Madhurima Uppalapati, MD

Hematologist/Oncologist affiliated with Wellstar since 2006.

Affiliate
Specialties
Hematology/Oncology
Learn More
John French, MD

Hematologist/Oncologist affiliated with Wellstar since 2016.

Affiliate
Specialties
Hematology/Oncology
Learn More
Yuanyue Sun, MD

Oncologist affiliated with Wellstar since 2024.

Affiliate
Specialties
Hematology/Oncology
Learn More
Raul Oyola, MD

Hematologist/Oncologist affiliated with Wellstar since 2001.

Affiliate
Specialties
Hematology/Oncology
Learn More
Fang Liu, MD

Hematologist/Oncologist affiliated with Wellstar since 2025.

Affiliate
Specialties
Hematology/Oncology
Learn More
Dean Kirkel, MD

Hematologist/Oncologist affiliated with Wellstar since 2013.

Affiliate
Specialties
Hematology/Oncology
Learn More
Carlos Osmon, MD

Hematologist/Oncologist affiliated with Wellstar since 2005.

Affiliate
Specialties
Hematology/Oncology
Learn More
Carmen Klass, MD

Hematologist/Oncologist affiliated with Wellstar since 2006.

Affiliate
Specialties
Hematology/Oncology
Learn More
See More Results

Meet our Team

Hillary Hahm, MD

Hematologist/Oncologist affiliated with Wellstar since 2000.

Affiliate
Specialties
Hematology/Oncology
Learn More
Steven McCune, MD

Hematologist/Oncologist affiliated with Wellstar since 2001.

Affiliate
Specialties
Hematology/Oncology
Learn More
Walid Shaib, MD

Hematologist/Oncologist affiliated with Wellstar since 2018.

Affiliate
Specialties
Hematology/Oncology
Learn More
Aswani Thurlapati, MD

Hematologist/Oncologist affiliated with Wellstar since 2025.

Affiliate
Specialties
Hematology/Oncology
Learn More
Zulfiqar Malik, MD

Hematologist/Oncologist affiliated with Wellstar since 2022.

Affiliate
Specialties
Hematology/Oncology
Learn More
Sarah McCrea, NP

Nurse Practitioner affiliated with Wellstar since 2021.

Affiliate
Specialties
Hematology/Oncology
Learn More
Madhurima Uppalapati, MD

Hematologist/Oncologist affiliated with Wellstar since 2006.

Affiliate
Specialties
Hematology/Oncology
Learn More
John French, MD

Hematologist/Oncologist affiliated with Wellstar since 2016.

Affiliate
Specialties
Hematology/Oncology
Learn More
Yuanyue Sun, MD

Oncologist affiliated with Wellstar since 2024.

Affiliate
Specialties
Hematology/Oncology
Learn More
Raul Oyola, MD

Hematologist/Oncologist affiliated with Wellstar since 2001.

Affiliate
Specialties
Hematology/Oncology
Learn More
Fang Liu, MD

Hematologist/Oncologist affiliated with Wellstar since 2025.

Affiliate
Specialties
Hematology/Oncology
Learn More
Dean Kirkel, MD

Hematologist/Oncologist affiliated with Wellstar since 2013.

Affiliate
Specialties
Hematology/Oncology
Learn More
Carlos Osmon, MD

Hematologist/Oncologist affiliated with Wellstar since 2005.

Affiliate
Specialties
Hematology/Oncology
Learn More
Carmen Klass, MD

Hematologist/Oncologist affiliated with Wellstar since 2006.

Affiliate
Specialties
Hematology/Oncology
Learn More

Hillary Hahm, MD

Hematologist/Oncologist affiliated with Wellstar since 2000.

Affiliate
Specialties
Hematology/Oncology
Education
Doctor of Medicine
Patient Rating

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.


Steven McCune, MD

Hematologist/Oncologist affiliated with Wellstar since 2001.

Affiliate
Specialties
Hematology/Oncology
Education
Doctor of Medicine
Patient Rating

Dr. McCune was born and raised in Atlanta. In June 1987, Dr. McCune received his undergraduate degree in biology from Massachusetts Institute of Technology in Cambridge. He continued his education at the University of Alabama in Birmingham as part of the Medical Scientist Training Program where in June 1995 he received a Ph.D, in biochemistry and his medical degree one year later, in May 1996. Dr. McCune remained at the University of Alabama in Birmingham completing his internship and residency in internal medicine.

During his time at the University of Alabama at Birmingham, Dr. McCune was the recipient of numerous awards including: First Place, 25th Annual Medical Student Research Day (1988); First Place, Sigma Xi Graduate Student Research Day (1994); Best Graduate, Student Publication, Department of Biochemistry and Molecular Genetics (1995); Third Place Award, Poster Presentation; Department of Medicine Trainee Research Symposium (1995).

In July 1999, Dr. McCune transferred to Duke University Medical Center in Durham, N.C. to complete his fellowship in Hematology and Medical Oncology.  Upon completion of his fellowship in June 2002, Dr. McCune joined Northwest Georgia Oncology Centers, P.C., in Marietta where he currently evaluates and treats patients while actively participating in Clinical Trials and Research.

Dr. McCune is board certified in Internal Medicine and Medical Oncology.

Walid Shaib, MD

Hematologist/Oncologist affiliated with Wellstar since 2018.

Affiliate
Specialties
Hematology/Oncology
Education
Doctor of Medicine
Patient Rating

Aswani Thurlapati, MD

Hematologist/Oncologist affiliated with Wellstar since 2025.

Affiliate
Specialties
Hematology/Oncology
Education
Doctor of Medicine - MBBS
Patient Rating

Zulfiqar Malik, MD

Hematologist/Oncologist affiliated with Wellstar since 2022.

Affiliate
Specialties
Hematology/Oncology
Education
Doctor of Medicine
Patient Rating

Sarah McCrea, NP

Nurse Practitioner affiliated with Wellstar since 2021.

Affiliate
Specialties
Hematology/Oncology
Education
Masters
Patient Rating

Madhurima Uppalapati, MD

Hematologist/Oncologist affiliated with Wellstar since 2006.

Affiliate
Specialties
Hematology/Oncology
Education
Doctor of Medicine
Patient Rating

Dr. Uppalapati came to the United States from her native India in July 2000 to pursue her medical education. Upon completing her Fellowship in 2006 at Georgetown University Hospital, Dr. Uppalapati joined the cancer care team of Northwest Georgia Oncology Centers.
 
She currently serves as the Chairperson of the Cartersville Medical Center’s Cancer Committee. She also is actively involved in cancer research and clinical trials to find a cancer cure and provide her patients with the most advanced cancer treatment available in Georgia.

John French, MD

Hematologist/Oncologist affiliated with Wellstar since 2016.

Affiliate
Specialties
Hematology/Oncology
Education
Doctor of Medicine
Patient Rating

Yuanyue Sun, MD

Oncologist affiliated with Wellstar since 2024.

Affiliate
Specialties
Hematology/Oncology
Education
Doctor of Medicine
Patient Rating

Raul Oyola, MD

Hematologist/Oncologist affiliated with Wellstar since 2001.

Affiliate
Specialties
Hematology/Oncology
Education
Doctor of Medicine
Patient Rating

Dr. Oyola is a native of the country of Colombia where in 1990 he received his medical degree with honors at the Metropolitan University in Barranquilla, Colombia.  In July 1992, he came to the United States to continue his studies in medicine as a resident in internal medicine at St. John’s Episcopal Hospital, University Hospital of the State University of New York in Brooklyn. Dr. Oyola went on to complete his fellowship in Hematology and Oncology at the University of Tennessee in Memphis.

Upon completion of his fellowship in 2001, Dr. Oyola joined Northwest Georgia Oncology Centers, P.C. at Wellstar Kennestone Hospital where he currently evaluates and treats patients while actively participating in Clinical Trials and Research as Co-PI for NGOC clinical trials.

Dr. Oyola is the past chairman Wellstar Health System Cancer Committee and Wellstar Cobb Hospital Credentials Committee. He is currently serving as part of the Wellstar Oncology Cabinet. He is also a member of the American Society of Clinical Oncology, the American Society of Hematology, the Cobb County Medical Society and the Medical Association of Georgia.

Dr. Oyola is board certified in Internal Medicine, Hematology and Medical Oncology.


Fang Liu, MD

Hematologist/Oncologist affiliated with Wellstar since 2025.

Affiliate
Specialties
Hematology/Oncology
Education
Doctor of Medicine
Patient Rating

Dean Kirkel, MD

Hematologist/Oncologist affiliated with Wellstar since 2013.

Affiliate
Specialties
Hematology/Oncology
Education
Doctor of Medicine
Patient Rating

Carlos Osmon, MD

Hematologist/Oncologist affiliated with Wellstar since 2005.

Affiliate
Specialties
Hematology/Oncology
Education
Doctor of Medicine
Patient Rating

Dr. Osmon is a native of Argentina where in June 968 he received his medical degree at La Plata Medical School, University of La Plata in Buenos Aires, Argentina.

Between July 1968 and June 1971, Dr. Osmon acted as junior and senior house physician in internal medicine at the Regional Hospital of Mar Del Plata in Buenos Aires.

In July 1971, Dr. Osmon came to the United States to continue his studies in medicine as an Oncology Research Fellow and Rotating Resident at Tufts Oncology Unit (Boston, Massachusetts) serving at Pondville Hospital in Walpole, Massachusetts. In July 1972, Dr. Osmon transferred as a junior and senior resident and teaching fellow in internal medicine to Brown University, School of Medicine primarily at Roger Williams General Hospital in Providence, R.I,

Dr. Osmon went on to complete his fellowship in Hematology and Medical Oncology at Emory University, School of Medicine in Atlanta. Upon completion of his fellowship in June 1976, Dr. Osmon went into private practice now recognized as Northwest Georgia Oncology Centers, P.C., at Wellstar Cobb Hospital where he currently evaluates and treats patients while actively participating in Clinical Trials and Research as well.

Dr. Osmon has served as chairman of many committees at local hospitals including Wellstar Cobb and Wellstar Kennestone.  He is also a member of the American Medical Association, the ACP, the American Society of Hematology, and Cobb County Medical Society.

Dr. Osmon is board certified in Internal Medicine, Hematology and Medical Oncology.

Carmen Klass, MD

Hematologist/Oncologist affiliated with Wellstar since 2006.

Affiliate
Specialties
Hematology/Oncology
Education
Doctor of Medicine
Patient Rating

Dr. Klass was born in Tuttlingen, Germany.  In September 1989, she received her undergraduate degree at Ruhr Unversitaet in Bochum, Germany.  Dr. Klass subsequently received her M.D. at Eberhard Karls Universitaet in Tuebingen, Germany in June of 1994 and her Ph.D. in June of 1996.

In November 1996, Dr. Klass came to the United States to continue her studies in medicine as a Research Fellow in Cell Biology at the University of Alabama at Birmingham. In August 2000, Dr. Klass transferred to Emory University, School of Medicine in Atlanta, where she completed her internal medicine residency and completed her Hematology and Medical Oncology fellowship at the Winship Cancer Institute of Emory University in August 2006.

Upon completion of her fellowship, Dr. Klass worked as a staff physician at the VA Medical Center in Atlanta.  In January  2007, Dr. Klass joined Northwest Georgia Oncology Centers, P.C., at Wellstar Kennestone Hospital where she currently evaluates and treats patients while actively participating in Clinical Trials and Research.

Dr. Klass is board certified in Internal Medicine, Hematology and Medical Oncology.

Helpful Information for your next visit.

  • Appointments and Cancellations
  • Hospitalization
  • Insurance and Payments
  • Prescription Refills
  • Printable Office Forms
  • Referrals
Appointments and Cancellations

Thank you for choosing Northwest Georgia Oncology Centers for patient-centered care for cancer and blood disorders. We'll do our best to accommodate your schedule and get your first appointment scheduled quickly.

To make an appointment, get a second opinion or you are a physician’s office referring a new patient, please call our referral line at (678) 331-3277. If you were referred to us by another physician, your first appointment may already be scheduled at a location nearest you.

Hospitalization

If a patient is hospitalized, our physicians at this practice have privileges at Wellstar Kennestone Hospital.

Insurance and Payments
Wellstar works hard to create lasting relationships with medical insurance companies to ensure you’re receiving the best possible care. As you receive cancer care and treatment here by Northwest Georgia Oncology physicians, Wellstar confirms your primary insurance coverage, explains your benefits and files insurance claims with your carrier. If your insurance plan requires a referral for office visits, a referral must be received prior to your visit. Payment is expected at the time of service for office visits and most plans require a co-payment at the time of service. For patients requiring additional financial assistance, an office representative will help develop a payment plan and file your insurance accordingly. If you require hospitalization, we will file primary insurance claims for any physician services provided to you while at the hospital. Our participation in insurance plans is subject to change. Please notify us if you expect a change to your insurance or if your address or phone number changes.
Prescription Refills
To better serve your prescription needs, Wellstar and Northwest Georgia Oncology Centers offer a specialty pharmacy at Wellstar Cancer Center at Kennestone Hospital serving patients from all of our locations to help expedite treatment. The pharmacy is staffed by a pharmacist and pharmacy technicians with expertise in oncology and hematology medications and resources. Specializing in oncology and hematology drugs, most are kept in stock to prevent treatment delay. We provide expedited service at the time of your appointment and checkout.
Printable Office Forms
Wellstar Privacy Practices
Referrals
If you are a physician referring a new patient, please call the referral line at (678) 331-3277.

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In the Community Health Highlights Events & Classes
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ABOUT US

About Wellstar Diversity Equity Inclusion & Belonging Leadership Wellstar Board of Trustees Healthcare Innovation Safety First Commitment Wellstar Research Institute Latest News

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Pay Your Bill Accepted Insurance

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Contact Us Hospital Transparency Information Price Transparency Policy and Privacy Information

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