C. Lawrence "Larry" Horn, MD
Provider at Old Georgetown Mental Health Associates
Meet Dr. Horn
C. Lawrence "Larry" Horn, MD is a board-certified psychiatrist and partner at Old Georgetown Mental Health Associates in Rockville, MD. He practices general adult psychiatry and is known for taking the time his patients need, working with each person to develop solutions tailored to their circumstances.
Dr. Horn graduated from Georgetown University School of Medicine in 1995 and completed his psychiatric residency at Duke University Medical Center in 1999. He has been practicing psychiatry in Maryland since 2000. He is a Diplomate of the American Board of Psychiatry and Neurology, a Fellow of the American Psychiatric Association, and a member of the Washington Psychiatric Society.
In his practice, Dr. Horn combines thoughtful medication management with psychotherapy, and he works closely with other psychotherapists involved in his patients' care. His approach is grounded in attention to each patient as an individual — understanding a person's particular history and needs, and finding the treatment approach that fits them best.
Dr. Horn sees adult patients for both in-person and virtual appointments. He does not directly participate with insurance companies; many insurance plans include out-of-network benefits that may reimburse a portion of the cost, and the practice's billing assistant can help patients navigate that process. To learn more or to schedule an appointment with Dr. Horn, call
240-242-9856.
Dr. Horn's Credentials
Education & Training
- Medical School: 1995 Georgetown University School of Medicine
- Residency: 1999 Duke University Medical Center
Board Certification
2000 American Board of Psychiatry and Neurology
Professional Associations
- Fellow of the American Psychiatric Association
- Member of the Washington Psychiatric Society
Years in Practice
Practicing Psychiatry Since 1999
Ways to Contact Dr. Horn
All communications are responded to during business hours.
- Spruce Medical Messaging App
- Spruce is the preferred way to reach me — it works like texting, but fully encrypted and HIPAA-compliant. Download it for free and message me anytime.
- Phone: 240-242-9856
- Call to leave a voicemail.
- Text Message: 240-242-9856
- Standard texts are not encrypted and do not protect your health information. By texting this number, you accept responsibility for the privacy limitations of unsecured messaging.
- Urgent Matters: 240-242-9856, option 2
- For situations that cannot wait for my standard response time. This will reach me directly on my cell phone — please reserve it for truly urgent matters.
Insurance Information
Dr. Horn does not directly participate with any insurance companies. Many insurance policies have an out-of-network benefit which may reimburse you for a portion of your payment. La Shawn Farrish, our billing assistant, can guide you with this process.
