Psychiatrist | Child & Adolescent Psychiatry

Mark A Riddle, M.D.

5500 Knoll North Dr Ste 370, Columbia, Maryland, 21045-2393

About Mark A Riddle

Mark A Riddle is a psychiatrist based in Columbia, Maryland who is specialized in Child & Adolescent Psychiatry. Active license number of Mark A Riddle is D0045696 for Child & Adolescent Psychiatry in Maryland. His current practice location is 5500 Knoll North Dr Ste 370, Columbia. Patients can contact him at 410-837-2050 or can fax him at 866-629-0091. Mark A Riddle, M.D., specializes in Child & Adolescent Psychiatry and his NPI number (Unique professional ID assigned by NPPES) is 1316989304.

Mark A Riddle has done additional skills and training in the diagnosis and treatment of developmental, behavioral, emotional, and mental disorders of childhood and adolescence.

Practice Information

Mark A Riddle's specialty, credentials, practice address, contact phone number and fax are as below. Patients can call on the below given phone number for appointment.

Provider Name Mark A Riddle
Specialization Child & Adolescent Psychiatry
Credentials M.D.
Gender Male
Practice Address: 5500 Knoll North Dr Ste 370,
Columbia, MD - 21045-2393
Fax 866-629-0091

Professional Identification Codes

NPI number stands for National Provider Identifier which is a unique 10-digit identification number issued to healthcare providers in the United States by the Centers for Medicare and Medicaid Services (CMS). NPI details are as mentioned below.

NPI Number1316989304
NPI Enumeration Date: 12 Jun, 2006
NPI Last Update On: 21 Jul, 2022

Medical Licenses:

Healthcare professionals can hold one or more medical licenses for different specialties in the same state or different states. Related medical licenses for Mark A Riddle are as mentioned below.

License NumberSpecializationStateStatus
D0045696Child & Adolescent Psychiatry MarylandPrimary

Other Medical Identifiers

Other professional identifiers associated with Mark A Riddle such as Medicaid, Medicare PIN, NSC, UPIN etc. are mentioned as below.
IdentifierTypeStateIssuer
162501200MedicaidMaryland

Mailing Address

Business mailing address can be used for mailing purpose only, for visiting purpose patients need to refer above mentioned Practice address.

Mark A Riddle
1111 N Charles St,
Baltimore, MD - 21201-5505
Phone: 410-837-2050
Fax: 866-629-0091

Book an Appointment with Mark A Riddle

To schedule an appointment, contact Mark A Riddle at 5500 Knoll North Dr Ste 370, Columbia, Maryland or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Mark A Riddle:

Mark A Riddle is a psychiatrist specializing in Child & Adolescent Psychiatry. He has done additional skills and training in the diagnosis and treatment of developmental, behavioral, emotional, and mental disorders of childhood and adolescence.

Yes, Mark A Riddle is currently accepting new patients. To schedule an appointment, contact the office directly and schedule an appointment.
*Availability may change. Please contact the office directly to ask about appointments.

Mark A Riddle practices at 5500 Knoll North Dr Ste 370, Columbia, Maryland, 21045-2393.

To schedule an appointment with Mark A Riddle, please contact the office at 410-837-2050.

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**Data of this site is collected from Medicare & Medicaid Services (CMS) and NPPES. Last updated on 14 September, 2026.