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Summary
Dr. Mark Williams is an internal medicine and emergency medicine physician who earned his medical degree from Yonsei University. With 41 years of clinical experience, he brings extensive knowledge to patient care across multiple medical specialties. His dual expertise allows him to provide comprehensive primary care while also handling urgent medical situations that require immediate attention.
Dr. Williams practices at Northport VA Medical Center in Northport, NY, where he focuses on women's health concerns related to breast conditions. He specializes in treating fibrocystic breasts, dense breast tissue, and benign breast cysts. His procedural expertise includes performing mammograms, breast cancer screenings, and scintimammography to help detect and monitor breast health issues.
Dr. Williams practices at Northport VA Medical Center in Northport, NY, where he focuses on women's health concerns related to breast conditions. He specializes in treating fibrocystic breasts, dense breast tissue, and benign breast cysts. His procedural expertise includes performing mammograms, breast cancer screenings, and scintimammography to help detect and monitor breast health issues.
Overview based on verified provider data
Quick Facts
- 41 years of experience
- 5 insurance plans accepted
- YONSEI UNIVERSITY
- 2 specialties
- 4 areas of expertise
- 1 hospital affiliation
- 1 office location
- Male
Office Location
Compare with Similar Doctors
 |  |  |  |
| Dr. Mark Williams, MD | Dr. Lisa Persaud, MD | Dr. Piya Ghoshal, MD | Dr. Peter George Hasapis, MD |
| Internal Medicine | Internal Medicine | Internal Medicine | Internal Medicine |
| Accepts New Patients | Accepts New Patients | Accepts New Patients | |
| 41 Years of Experience | 20 Years of Experience | 28 Years of Experience | |
| No Virtual Visit Option | Virtual Visit Available | No Virtual Visit Option | No Virtual Visit Option |
| Speaks English | Speaks Russian, Spanish, English | ||
| Northport , NY | Hicksville , NY | Amityville , NY | New Canaan , CT |
| Med School: YONSEI UNIVERSITY | Med School: St Georges University School Of Medicine | Med School: St Georges University School Of Medicine | Med School: Cornell University Medical College |
Current Profile | View Profile | View Profile | View Profile |
Insurance Plans Accepted by Dr. Mark Williams
Medical Specialties
Dr. Mark Williams has the following 2 specialties
Specialty Expertise
Dr. Mark Williams has the following 4 areas of expertise
Certifications, License, & Education
41 Years Experience
Dr. Mark Williams holds an active medical license in the state of New York.
Medical License
Medical Doctor with an active medical license in the state of New York that expires in 2026.
Education & Training
Medical School
Graduated from YONSEI UNIVERSITY in 1989 and Yonsei University College Of Medicine in 1985.
NPI Number
Dr. Williams' NPI number is 1275645806.
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Frequently Asked Questions
- Does Dr. Mark Williams accept my insurance?
- You can see the insurance plans that Dr. Mark Williams accepts on their Vitals profile.
- Does Dr. Mark Williams accept virtual/telehealth appointments?
- Dr. Mark Williams has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
- Where is Dr. Mark Williams's office located?
- Dr. Mark Williams's office is located at 79 Middleville Rd, Northport, NY, 11768.
- Which hospitals is Dr. Mark Williams affiliated with?
- Dr. Mark Williams is affiliated with Northport Va Medical Center.
- How can I make an appointment with Dr. Mark Williams?
- You can find contact information for Dr. Mark Williams here on Vitals.
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