Accepting patients
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Hays, Medical Oncologist in Columbus, OH?
Dr. John Hays, MD, PHD is a Medical Oncologist, who primarily practices in Columbus, OH with 2 additional practice locations. He is board certified by the American Board of Internal Medicine. Dr. Hays is fluent in English, and is currently seeing new patients. Dr. Hays’s practice accepts Medicare, UnitedHealthcare, Aetna and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Hays’s office at (614) 293-6529.
What are Areas of Expertise for Dr. Hays?
Dr. John Hays, MD, PHD is a highly-rated, board-certified Medical Oncologist known for expertly diagnosing, treating, and managing a wide array of related conditions or procedures. Utilizing the latest medical advancements and evidence-based practices, Dr. Hays empowers patients to confidently navigate their health journey, specializing in Appendix Cancer, Clinical Trials, Gastrointestinal Cancer, Gynecologic Cancers, or comprehensive wellness support. Serving the Columbus/OH community, Dr. Hays is dedicated to enhancing lives through expert, patient-centered care.
Where did Dr. Hays go to medical school and complete their residency?
Fellowship: Medical Oncology: National Cancer Institute
Is Dr. Hays board certified in Medical Oncologist?
Yes, Dr. John Hays, MD, PHD is board certified by the American Board of Internal Medicine , American Board of Internal Medicine since 2008, American Board of Internal Medicine since 2011
What languages does Dr. Hays speak?
Dr. Hays and their clinical team can communicate with patients in the following languages:
English
What conditions does Dr. Hays treat?
As a Medical Oncologist, Dr. Hays diagnoses, treats, and manages a wide range of conditions. This condition information is derived from anonymized insurance claims and highlights the medical conditions most commonly treated by Dr. Hays. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly.
Also known as:
- Colorectal Cancer
- Appendix Cancer
- Colon Cancer
- Bowel Cancer
- Colorectal Carcinoma
- Rectal cancer
- Colon cancer
- Bowel cancer
- Malignant neoplasm of rectum
- Malignant neoplasm of colon
- Ascending Colon Cancer
- Malignant neoplasm of sigmoid colon
- Malignant neoplasm of cecum
ICD-10 Codes:
- C181: Malignant neoplasm of appendix
- C20: Malignant neoplasm of rectum
- C189: Malignant neoplasm of colon, unspecified
- C182: Malignant neoplasm of ascending colon
- C187: Malignant neoplasm of sigmoid colon
- C180: Malignant neoplasm of cecum
Also known as:
- Cancer Chemotherapy
- Cancer Immunotherapy
- Chemo treatment
- Oncology chemotherapy
- Cancer drug therapy
- Oncology immunotherapy
- Immune therapy for cancer
ICD-10 Codes:
- Z5111: Encounter for antineoplastic chemotherapy
- Z5112: Encounter for antineoplastic immunotherapy
Also known as:
- Cancer Follow-up Exam
- Primary Cancer (Unspecified Site)
- Cancer
- Post-cancer treatment checkup
- Malignancy surveillance
- Oncology follow-up
- Malignant tumor
- Neoplasm
- Cancer of unknown primary
ICD-10 Codes:
- Z08: Encounter for follow-up examination after completed treatment for malignant neoplasm
- C801: Malignant (primary) neoplasm, unspecified
Also known as:
- Peritoneal Mesothelioma
- Mesothelioma
- Malignant Mesothelioma Treatment (PDQ)
- Abdominal Mesothelioma
- Malignant Peritoneal Mesothelioma
- Mesothelioma of Abdomen
- Peritoneal Asbestos Cancer
ICD-10 Codes:
- C451: Mesothelioma of peritoneum
Also known as:
- General Counseling Services
- Personal Counseling
- Life Coaching
- Support Services
ICD-10 Codes:
- Z7189: Other specified counseling
Also known as:
- Growth of Unknown Type in the Appendix
- Colonic Disease
- Indeterminate appendix mass
- Appendix tumor of unknown nature
- Appendix neoplasm of uncertain behavior
ICD-10 Codes:
- D373: Neoplasm of uncertain behavior of appendix
Also known as:
- Digestive System Cancer
- Cancer
- Digestive Disease
- Gastrointestinal cancer
- Malignant neoplasm of digestive system
ICD-10 Codes:
- C269: Malignant neoplasm of ill-defined sites within the digestive system
Also known as:
- Pancreatic Cancer
- Pancreas Cancer
- Malignant Pancreatic Tumor
- Pancreatic Carcinoma
ICD-10 Codes:
- C259: Malignant neoplasm of pancreas, unspecified
Also known as:
- Secondary Peritoneal Cancer
- Cancer
- Peritoneal Disorder
- Metastatic Peritoneal Cancer
- Cancer Spread to Peritoneum
- Peritoneal Carcinomatosis
ICD-10 Codes:
- C786: Secondary malignant neoplasm of retroperitoneum and peritoneum
Also known as:
- Ovarian Cancer
- Cancer of the ovary
- Ovarian carcinoma
- Female reproductive cancer
ICD-10 Codes:
- C563: Malignant neoplasm of bilateral ovaries
Which procedures does Dr. Hays perform as a Medical Oncologist?
As a Medical Oncologist, procedures performed by a Dr. John Hays may include:
- 3D Conformal Radiotherapy
- Adaptive Radiation Therapy (ART)
- Adrenalectomy
- Blood Thinning Therapy / Anticoagulation
- Blood Transfusion Consultation
- Blood Transfusion Follow Up
- Bone Excision
- Bone Grafting
For detailed information, please contact Dr. Hays' office.
Does Dr. Hays accept my insurance?
Dr. Hays accepts most major insurance plans. Important: Please call our office at (614) 293-6529 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Hays accept in Columbus, OH?
Dr. Hays in Columbus, OH accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
CareSource
Centene
CVS Health (formerly Aetna)
Elevance Health Inc. (formerly Anthem)
Humana
Medica
Medical Mutual
Medicare
State of Ohio
UnitedHealthcare
View All Insurances
Where is Dr. Hays' office located?
Recognitions
Castle Connolly Doctor’s Choice Awards
Doctor’s Choice - 2025
Among the most nominated for the Castle Connolly Top Doctor recognition in 2025
What is Dr. Hays's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Hays's National Provider Identifier (NPI) number is 1588848931.
What common questions do patients ask about Dr. Hays?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Hays
What is Dr. John Hays's specialty?
Dr. Hays is a Medical Oncologist near Columbus, OH. An internist specializing in the diagnosis and treatment of various cancers and both benign and malignant tumors. This specialist determines and administers therapy for malignancies and collaborates with surgeons and radiation oncologists on additional cancer treatment options. Contact Dr. Hays to book an appointment today.
Is this Dr. John Hays affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Hays is affiliated with Ohio State The James Cancer Hospital, The Ohio State University Wexner Medical Center which are a Castle Connolly Top Hospitals. Castle Connolly Top Hospitals are healthcare institutions recognized for their excellence in specific medical procedures and overall patient care. They are identified through a rigorous peer nomination process, evaluating factors like patient outcomes, quality of care, and expertise. The list recognizes hospitals that excel in 20 or more specific medical procedures, representing the top 25% nationwide. Castle Connolly Top Hospitals
Where can I learn more about Medical Oncologist?
Explore Medical Oncologist with insights from trusted medical experts on EverydayHealth.com, where you'll find the most relevant content and helpful condition guides for up-to date information about symptoms, causes, diagnosis, treatment and more. See all our health guides to find trusted information on medical conditions from our experts at Everyday Health.
Is John Hays accepting new patients in Columbus, OH?
Yes, Dr. John Hays is accepting new patients at this time.
Does Dr. John Hays offer online booking?
Please contact Dr. Hays's office at (614) 293-6529 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with John Hays?
Please contact Dr. Hays's office at (614) 293-6529 for information regarding telehealth appointment availability or for scheduling assistance.
Which board certifications does Dr. John Hays have?
Dr. John Hays is certified by the American Board of Internal Medicine.
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