Psychologist | Clinical Psychology

Dr. Holly Drewer Erwin, PH.D.

9625 Surveyor Ct Ste 200, Manassas, Virginia, 20110-4408

About Dr. Holly Drewer Erwin

Dr. Holly Drewer Erwin is a psychologist based in Manassas, Virginia who is specialized in Clinical Psychology. Active license number of Dr. Holly Drewer Erwin is 0810003271 for Clinical Psychology in Virginia. Her current practice location is 9625 Surveyor Ct Ste 200, Manassas. Patients can contact her at 703-330-9933 or can fax her at 703-368-8454. Dr. Holly Drewer Erwin, PH.D., specializes in Clinical Psychology and her NPI number (Unique professional ID assigned by NPPES) is 1215940648.

Dr. Holly Drewer Erwin is a mental health professional with highly specialized training in the diagnosis and psychological treatment of mental, behavioral and emotional illnesses, including obsessive-compulsive disorder (OCD). Her main focus is on diagnosing and treating mental, emotional, and behavioral disorders. Some of the common disorders that she can treat are learning disabilities, substance abuse, depression, anxiety, and eating disorders.

Practice Information

Dr. Holly Drewer Erwin'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 Dr. Holly Drewer Erwin
Specialization Clinical Psychology
Credentials PH.D.
Gender Female
Practice Address: 9625 Surveyor Ct Ste 200,
Manassas, VA - 20110-4408
Fax 703-368-8454

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 Number1215940648
NPI Enumeration Date: 15 Aug, 2006
NPI Last Update On: 09 Jul, 2007

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 Dr. Holly Drewer Erwin are as mentioned below.

License NumberSpecializationStateStatus
0810003271Clinical Psychology VirginiaPrimary

Mailing Address

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

Dr. Holly Drewer Erwin
9625 Surveyor Ct Ste 200,
Manassas, VA - 20110-4408
Phone: 703-330-9933
Fax: 703-368-8454

Book an Appointment with Dr. Holly Drewer Erwin

To schedule an appointment, contact Dr. Holly Drewer Erwin at 9625 Surveyor Ct Ste 200, Manassas, Virginia or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Dr. Holly Drewer Erwin:

Dr. Holly Drewer Erwin is a psychologist specializing in Clinical Psychology. She is a mental health professional with highly specialized training in the diagnosis and psychological treatment of mental, behavioral and emotional illnesses, including obsessive-compulsive disorder (OCD). Her main focus is on diagnosing and treating mental, emotional, and behavioral disorders. Some of the common disorders that she can treat are learning disabilities, substance abuse, depression, anxiety, and eating disorders.

Yes, Dr. Holly Drewer Erwin 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.

Dr. Holly Drewer Erwin practices at 9625 Surveyor Ct Ste 200, Manassas, Virginia, 20110-4408.

To schedule an appointment with Dr. Holly Drewer Erwin, please contact the office at 703-330-9933.

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