Mark A Williamson
MD | Psychiatry | Child & Adolescent | 42+ years Exp
5901 Long Dr, Houston
Texas, 77087-1003
713-970-7000 713-970-7246
Maps & DirectionsMark A Williamson is a Houston, Texas based psychiatrist with 42 years of experience in Child & Adolescent. He completed his graduation from University Of Texas Medical Branch At Galveston in 1984. He accepts the Medicare-approved amount. Patients will not be billed for any more than the Medicare deductible and coinsurance. Active license number of Mark A Williamson is H4855 for Psychiatry in Texas. His current practice location is 5901 Long Dr, Houston. Patients can reach him at 713-970-7000 or can fax him at 713-970-7246. Mark A Williamson is MD in Child & Adolescent and his NPI number (Unique professional ID assigned by NPPES) is 1760591028.
Mark A Williamson has done additional skills and training in the diagnosis and treatment of developmental, behavioral, emotional, and mental disorders of childhood and adolescence.
Complete Profile:
Mark A Williamson speciality, credentials, practice address, contact phone number and fax are as below.
Patients can call on the below given phone number for appointment.
| Name: | Mark A Williamson |
| Specialization: | Child & Adolescent |
| Gender: | Male |
| Credentials: | MD |
| Experience: | 42+ years |
| Medical School Attended: | University Of Texas Medical Branch At Galveston |
| Graduation Year: | 1984 |
| Accepts Medicare Assignment: | Yes |
| Practice Address: | 5901 Long Dr, Houston,
Texas, 77087-1003 |
| Phone: | 713-970-7000 |
| Fax: | 713-970-7246 |
Professional Identification Codes:
NPI number stands for National Provider Identifier which is a unique 10-digit identification number issued to health care providers in the United States by the Centers for Medicare and Medicaid Services (CMS).
NPI details are as mentioned below.
| PAC ID: | 2961472444 |
| Enrollment ID: | I20071128000418 |
| NPI Number: | 1760591028 |
| NPI Enumeration Date: | 30 Aug, 2006 |
| NPI Last Update On: | 29 Jan, 2019 |
Medical Licenses:
Doctors can have one or more medical licenses for different specialities in the same state or different states. Related medical licenses for Mark A Williamson are as mentioned below.
| License Number | Specialization | State | Status | |
| H4855 | Psychiatry | Texas | Primary | |
| H4855 | Child & Adolescent | Texas | Secondary | |
Group Practice:
Group practices are practice of medicine by a group of physicians who share their premises and other resources. Following list states all the group name
with which Mark A Williamson is associated with along with the number of members in that group.
| Organization Name (Group PAC ID) | Members |
| The Harris Center For Mental Health And Idd (9739088790) | 76 |
Business Mailing Address:
Business mailing address can be used for mailing purpose only, for visiting purpose patients need to refer above mentioned address.
| Address: | Mark A Williamson
9401 Southwest Fwy,
Houston, Texas |
| Zip: | 77074-1407 |
| Phone Number: | 713-970-7000 |
| Fax Number: | 713-970-7246 |
Patients can reach Mark A Williamson at
5901 Long Dr, Houston, Texas or can
call to book an appointment on 713-970-7000.
Comments/ Reviews:
Read all the reviews posted for Mark A Williamson below. You may also share your own experience with Mark A Williamson. Your feedback can help others make better decisions.
**
Data of this site is collected from Medicare & Medicaid Services (CMS) and NPPES. Last updated on 08 December, 2025.