Dr. John Zapas, MD

Surgical OncologyMale

Surgical Oncology

Dr. John Zapas, MD is a Surgical Oncology Specialist in Frederick, MD and has over 31 years of experience in the medical field. He graduated from Harvard Medical School medical school in 1991. He is affiliated with Frederick Health. His office is not accepting new patients.

Dr. John Zapas, MD

Frederick Health Medical Group - Specialty Care

194 Thomas Johnson Dr Ste C Frederick, MD 21702 ()

Make an Appointment

(240) 566-7868

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Hospital Highlight

Dr. Zapas is affiliated with Frederick Health Frederick, a highly rated hospital.

At a Glance

  • Explains Conditions Well
    Patients said this doctor explains conditions well. See reviews
  • Practices at Top Hospital
    America's 100 Best Hospitals Award™ See hospitals
  • Recent Reviews
    Reviews made in the last 30 days. See reviews

Experience and Background Checks


Background Check

Healthgrades does not collect malpractice claims information for Maryland
No disciplinary actions found for the years we collect data
No board actions found for the years we collect data
Learn more about background checks

Experience Check

Check Dr. Zapas' experience treating your condition or procedure

Dr. Zapas' Top Procedures and Conditions

Treatment Frequency
Inguinal Hernia

Treatment Frequency

Dr. Zapas treats Inguinal Hernia more than 86% of his peers

Dr. Zapas treats this condition more than 86% of his peers

Inguinal Hernia Repair, Laparoscopic

Treatment Frequency

Dr. Zapas performs Inguinal Hernia Repair, Laparoscopic more than 76% of his peers

Dr. Zapas performs this procedure more than 76% of his peers

Hernia Repair

Treatment Frequency

Dr. Zapas performs Hernia Repair more than 72% of his peers

Dr. Zapas performs this procedure more than 72% of his peers

Dr. Zapas' conditions and procedures:

  • Abdominal Pain
  • Abdominoplasty
  • Abscess or Cyst Drainage or Aspiration
  • Abscess or Fluid Incision and Drainage
  • Anal and Rectal Cancer
  • Anal Fissure
  • Anal or Rectal Pain
  • Anorectal Abscess
  • Anoscopy
  • Appendectomy, Laparoscopic
  • Appendicitis
  • Axillary Lymph Node Dissection
  • Barrett's Esophagus
  • Benign Neoplasm of the Digestive System
  • Bile Duct Cancer
  • Breast Cancer
  • Cholecystitis and Gallstones
  • Colectomy
  • Colectomy and Sigmoidectomy With Robotic Assistance
  • Colorectal Cancer
  • Constipation
  • Crohn's Disease
  • Diaphragmatic and-or Hiatal Hernia
  • Duodenal Polypectomy
  • Enterostomy (Laparoscopic or Open)
  • Esophageal Cancer
  • Excision of Esophageal Lesion
  • Excision of Rectal Tumor
  • Excision of Stomach Tumor
  • Excision, Shaving, or Destruction of Skin and Subcutaneous Tissue (incl. Mohs Micrographic Surgery), Tissue Transfer
  • Gallbladder and Biliary Tract Cancer
  • Gallbladder Cancer
  • Gallbladder Removal
  • Gallbladder Removal (Cholecystectomy), Laparoscopic
  • Gallbladder Removal (Cholecystectomy), Open
  • Gallstones
  • Gastrectomy
  • Gynecologic Cancer
  • Hemorrhoidectomy or Excision of Anal Tags
  • Hemorrhoids
  • Hernia Repair
  • Hiatal Hernia
  • Hidradenitis
  • Ileus
  • Incisional Hernia
  • Incisional Hernia Repair, Laparoscopic
  • Inflammatory Bowel Disease
  • Inguinal Hernia
  • Inguinal Hernia Repair, Laparoscopic
  • Inguinal Hernia Repair, Open
  • Intestinal Abscess
  • Intestinal Obstruction
  • Intestinal Transplant (incl. Enterectomy)
  • Laparoscopic Excision or Destruction of Ovary With Robotic Assistance
  • Laparotomy
  • Lipomas
  • Liver Cancer
  • Lung Cancer
  • Lymph Node Biopsy or Excision
  • Male Breast Cancer
  • Mastectomy
  • Neuroendocrine Tumors
  • Non-Invasive Mechanical Ventilation With Robotic Assistance
  • Open Incisional and-or Ventral Hernia Repair
  • Pancreatic Cancer
  • Partial Lung Collapse
  • Pelvic Abscess
  • Peripheral Arterial Aneurysm
  • Peripheral Arterial Aneurysm and Dissection
  • Peripheral Vascular Disease (PAD, PVD)
  • Pleural Effusion
  • Port Placements or Replacements
  • Proctectomy, Open or Laparoscopic (incl. Swenson and Duhamel Procedures)
  • Removal or Destruction of Rectal or Intestinal Tumor (incl. Colonoscopy, Proctosigmoidoscopy, Sigmoidoscopy and Control of Hemorrhage)
  • Ruptured Aortic Aneurysm
  • Secondary Malignancies
  • Small Intestine Cancer
  • Soft Tissue Sarcoma
  • Soft Tissue Tumor Removal
  • Sphincterotomy
  • Splenectomy
  • Splenectomy and Splenorrhaphy
  • Stomach and Small Intestine Cancer
  • Testicular Cancer
  • Thoracentesis
  • Thyroid Lobectomy
  • Thyroid Nodule
  • Thyroidectomy or Thyroid Lobectomy
  • Total Splenectomy With Robotic Assistance
  • Ulcerative Colitis
  • Umbilical Hernia
  • Umbilical or Ventral Hernia Repair, Laparoscopic
  • Vascular Insufficiency of Intestines
  • Ventral Hernia
  • Wound Repair

Insurance Check

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Dr. Zapas accepts

Accepted insurance can change. Please double-check when making an appointment.

(240) 566-7868

Dr. Zapas accepts the following insurance:

Aetna HMO
Choice Plus POS II
National (BlueCard) PPO
Anthem Blue Cross Blue Shield
KeyCare PPO
Blue Cross Blue Shield
Blue Card PPO
CareFirst Blue Cross Blue Shield
Blue Choice Advantage
Blue Preferred PPO
CareFirst Maryland POS
HealthyBlue 2.0
HealthyBlue Advantage
Cigna HMO
Cigna PPO
Open Access Plus
First Health (Coventry Health Care)
First Health (Coventry Health Care) PPO
Choice Care PPO
MultiPlan PPO

Dr. Zapas' Reviews

Likelihood to recommend Dr. Zapas


Based on 8 ratings

5 Stars
4 Stars
3 Stars
2 Stars
1 Star
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RecentHighestLowestMost Helpful
I had to have 2 surgeries within weeks which was not ideal. Dr. Zapas was informative kind compassionate and caring. He made sure not only I felt comfortable but my family as well! He is the best!
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Letitia Park – May 25, 2022
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Highly recommend Dr. Zapas and staff. He is an excellent surgeon.
MH-L – Jun 11, 2021
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About Me


Dr. John Zapas, MD is a Surgical Oncology Specialist in Frederick, MD and has over 31 years of experience in the medical field. He graduated from Harvard...Read more


  • Surgical Oncology

Board Certifications


Washington Hospital Center
Residency Hospital
Fellowship Hospital
Harvard Medical School
Medical School


  • English
  • Greek


Frequently Asked Questions

Does Dr. John Zapas, MD accept my insurance?

Use the Healthgrades insurance check to verify if Dr. Zapas accepts your insurance.

What are Dr. John Zapas, MD's top areas of care?

Dr. Zapas frequently treats Inguinal Hernia, Inguinal Hernia Repair, Laparoscopic, and Hernia Repair. See all procedures and conditions Dr. Zapas treats.

Where is Dr. John Zapas, MD's office located?

Dr. Zapas' office is located at 194 Thomas Johnson Dr Ste C, Frederick, MD 21702. Find other locations and directions on Healthgrades.

What languages does Dr. John Zapas, MD speak?

Dr. Zapas speaks Greek and English. View profile to see all.

Does Dr. John Zapas, MD offer telehealth services?

Dr. Zapas has not yet indicated whether they offer telehealth services. Please contact the office to check for availability/eligibility.

How can I make an appointment with Dr. John Zapas, MD?

Find contact information here to make an appointment.


Frederick Health Medical Group - Specialty Care

Surgery194 Thomas Johnson Dr Ste C Frederick, MD 21702

Affiliated Hospitals

Dr. Zapas is affiliated with the following hospital. Select the hospital below to learn more.

Learn more about how Healthgrades measuresHospital Quality.

Frederick Health

Frederick, MD

71% Patients that would definitely recommend, 1% higher than the national average

38 Awards Received

Award Highlight: America's 250 Best Hospitals Award™ (2022)