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(202) 466-3599

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Comprehensive Dental Care DC
1901 Pennsylvania Avenue NW
Washington, District of Columbia 20006
General Info: (202) 466-3599

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Comprehensive Dental Care DC Office Hours
  Morning Afternoon/Evening
Mon. 8am - 1pm 2pm - 5pm
Tue. 8am - 1pm 2pm - 5pm
Wed. 8am - 1pm 2pm - 5pm
Thu. 8am - 1pm 2pm - 5pm
Fri. Closed Closed
Sat. Close Closed
Sun. Closed Closed

Appointments: (202) 466-3599

How to Find Us

Dr. Marx's office is conveniently located on the corner of 19th and Pennsylvania Avenue, near George Washington Hospital and the World Bank, and next door to the Mexican Embassy.


This office is closed on the following holidays: New Year's Day, President's Day, Memorial Day, Independence Day, Labor Day, Thanksgiving Day, Christmas Day.

Experienced Washington Dentists for All Your Needs

At Comprehensive Dental Care DC we offer the highest quality preventive, restorative and cosmetic dental care. Washington dentists Dr. Alan Marx, Dr. Michael Kostrov, & Dr. Gunther Heyder have years of experience in everything from routine dental checkups, fillings, and teeth cleaning to treating more complex dental problems.

A healthy smile is not only a wonderful asset, it's also a key to your overall good health.

Call now for an appointment at (202) 466-3599 or just fill out our simple online form. Please don't hesitate to contact Comprehensive Dental Care DC if you have any questions. We are here to help, and look forward to speaking with you!

Dentistry appointments available.

Meet the Dentist
Dr. Alan Marx and his friendly team are committed to helping your receive the personalized dentistry care you need. At Comprehensive Dental Care DC our staff is trained in the latest techniques.

Dental Service Areas

Comprehensive Dental Care DC serves the following areas:

Map and Hours
If you need to find a dentist contact us at (202) 466-3599 for a map, office hours and directions. We're looking forward to helping your learn about your options for affordable dentistry.

 Call for an appointment:
(202) 466-3599

Make an Appointment

Meet The Doctors

Alan S. Marx

Alan S. Marx

Dr. Marx has been involved in dentistry since adolescence. His father was noted dental ceramist in New York City and Dr. Marx always worked in his laboratory.

Dr. Marx grew up in a lower middle class neighborhood in New York City. He was the first in the family to attend college. SUNY Buffalo was kind enough to finance his education. Dr. Marx was a psychology major and received a B.A. in 1971.

Dental school was next and he graduated in the top 10% of his class at Howard, receiving numerous honors.

He then attended Johns Hopkins Hospital from 1975-1976 for post doctorate training, focusing on surgery, general anesthesia, sedation and complicated restorative and cosmetic dentistry.

He has been in dental practice in the downtown business district since 1976.

Dr. Marx has been general chairman of the conference for dentistry on the local and national levels. He has been president of the DC Dental Society and has been on various councils of the ADA in Chicago.

In other words he is respected by patients and colleagues alike.

He has a daughter, Courtney, at Towson University and a son Jared at Virginia Tech, a devoted and patient wife, and a 200 pound English Mastiff, Gus.

Credentials and Memberships

  • American Dental Association
  • Fellow, International College of Dentistry
  • Fellow, Academy of General Dentistry
  • Past President, DC Dental Society
  • TV guest, lecturer, consultant
  • Internet Dental Alliance
Michael Kostrov

Michael Kostrov

Dr. Michael Kostrov is a native of Boston, where he received his Doctor of Dental Medicine degree from Tufts University School of Dental Medicine. Before dental school, Dr. Kostrov attended Tufts University where he completed his BS in Biology. While in college and dental school, he participated and coordinated numerous research studies including managing dental patients who were going through bone marrow transplants and dealing with patients with autoimmune disorders like Sjogren’s Syndrome.

The focus of Dr.Kostrov’s practice is comprehensive dentistry. He has completed extensive post-graduate training in the management of TMD patients as well as advanced cosmetic and reconstructive dentistry. His practice also focuses on the use of dental implants to restore form and function. He has completed his training in the prestigious Pankey Institute as well as other postgraduate dental institutions like the Seattle Institute and the Dawson Center. He has also completed his sedation dentistry training at the University of Maryland Dental School. Dr. Kostrov is an Invisalign provider.

Dr. Kostrov values his patients as if they were family. He cares about their overall health as well as making personal relationships with each and every person. He even hosts free health screenings such as for Oral Cancer using the newest Velscope technology, and for Sleep Apnea using the most advanced technology available including the ICAT cone beam scanner and has the ability to give patient’s home sleep studies using the Embletta X100.

Dr. Kostrov holds memberships in numerous professional oragaizations. They help provide the latest and most up to date information on advancements and new treatment options that are being and developed and used by the top dentists in the country.

Credentials and Memberships

  • American Dental Association
  • Academy of Cosmetic Dentistry
  • Academy of Craniofacial Pain
  • American Academy of Dental Sleep Medicine
  • American Dental Implant Academy- Fellowship
  • Academy of General Dentistry – Fellowship Eligible
  • Internet Dental Alliance
Gunther Heyder

Gunther Heyder

Dr. Gunther Heyder received his doctoral degree from the University Of North Carolina School Of Dentistry in Chapel Hill N.C. He received his Bachelor of Science degree with a major in Biological Sciences from North Carolina State University. After passing the North Carolina Dental Board Exam, Dr. Heyder gained employment at a public health dental clinic in Greenville, N.C.

After this rewarding experience, he returned to his hometown and worked in private practice in Kitty Hawk, N.C. Upon passing the North Eastern Regional Board, Dr. Heyder relocated to the District of Columbia are to join Comprehensive Dental Group.

Dr. Heyder has a special interest in General and Family Dentistry. He treats all ages from young children to older adults and thoroughly enjoys all aspects of dentistry from comprehensive restorative carte, extractions ti implant placement and dentures. He has special training in sleep apnea appliances, implant prosthesis, and esthetic crowns and veneers. He is a compassionate and gentle dentist who prides himself in the comfort he gives to the patient and his attention to bedside manner. Dr. Heyder works hard to establish caring relationships with each patient. He takes time talking and getting to know each of his patients and their families.

Dr. Heyder is a member of the American Dental Association, D.C. Dental Society, Alpha Omega Dental Fraternity, North Carolina Dental Association, and is licensed in North Carolina, as well as Washington D.C.

When he is not in the office practicing dentistry, he enjoys playing tennis, surfing, sailing and spending time with friends and family. He also continues to be involved in local and international dental projects.

More About Comprehensive Dental Care DC

Velsope, Oral Cancer Screening

We now have the Velscope oral cancer screening tool. It is an oral cancer screening tool that can detect oral cancer that a routine visual exam can not. It helps find oral cancer years earlier. Also many young men and women are getting oral cancer due to the HPV virus. They never smoked and drink very little which were thought to be the 2 main causes of oral cancer. This has been on the Dr. Oz and Doctors shows and is FDA cleared.

Click to watch...

ICAT Cone Beam CT scanner

This is the utmost advanced imaging system for implant treatment planning and safety.

Click here to learn more...

Digital Impressions

We offer a Lava COS chairside oral scanner for " digital impressions." No more gagging on the impression material.

For more information...

Sleep Apnea Treatment

Obstructive sleep apnea (OSA) is a sleep-related breathing disorder that prevents airflow during sleep.

Click below to find out more information on Sleep Apnea and treatment.

For more information...

Biolase EZlase Laser

We use the laser for TMJ treatment, it is FDA cleared, also for tissue surgery and treatment of things like apthous ulcers.

This is also used for Gingival recountouring also known as gingivoplasty.

Invisalign Invisible Braces

Invisalign is the invisible way to straighten your teeth without braces. Treatment takes about the same length of time as traditional braces and is far more comfortable.

Call us today to see if Invisalign is right for you.

Learn more…

CEREC Natural-Looking Tooth Restorations

We're pleased to be able to offer CEREC to our patients. Now damaged teeth can be restored in a single visit, usually in about one hour, with a durable ceramic material that matches the natural color of your other teeth.

Learn more…

 Call for an appointment:
(202) 466-3599

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