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MARY ANN WILLIAMSON
NPI 1003130865
Counselor - Professional in Saint Louis, MO

Active since March 23, 2010
7777 BONHOMME AVE, SUITE 909, SAINT LOUIS, MO 63105(800) 356-0845 Get Directions Write a Review

NPPES record last updated: March 23, 2010. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Mary Ann Williamson NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARY ANN WILLIAMSON (NPI 1003130865) is an individual professional provider in Saint Louis, Missouri, licensed in Missouri (001837) and active in the NPI registry since March 2010.

NPPES Registry Identity

NPI1003130865
Entity TypeIndividualFemale
Primary Taxonomy101YP2500X
Provider Legal NameMARY ANN WILLIAMSON
Location Address7777 BONHOMME AVE, SUITE 909Saint Louis, MO 63105-1911
Mailing Address9735 Landmark Parkway Dr, Suite 17Saint Louis, MO 63127-1646 · (314) 842-6223
Phone(800) 356-0845
Sole ProprietorYes
Enumeration DateMarch 23, 2010
✔ NPI 1003130865 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · ProfessionalBehavioral Health & Social Service Providers
Taxonomy Code101YP2500X
License✔ Licensed in MO · 001837
7777 BONHOMME AVE, Saint Louis, MO 63105
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Other Providers at the Same Location NPPES 11

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

CAITLYN MARIE HYDE
Behavior Technician
7777 BONHOMME AVE
CLAYTON, MO 63105
St. Louis County (636) 202-0693
BRIGHTER WINS ABA OF MO LLC
Behavior Analyst
7777 BONHOMME AVE
CLAYTON, MO 63105
St. Louis County (732) 378-9624
MISSOURIHEALTHPLUS
Family Medicine
7777 BONHOMME AVE, SUITE 2300
CLAYTON, MO 63105
St. Louis County (314) 786-3330
ASHLEY MARIE MUELLER
Behavior Technician
7777 BONHOMME AVE
CLAYTON, MO 63105
St. Louis County (636) 202-0693
DR. TINA MARIE REISING PSY.D.
Psychologist (Clinical)
7777 BONHOMME AVE, SUITE 1700
CLAYTON, MO 63105
St. Louis County (314) 725-1515
TRUE BENEVOLENCE HOME CARE LLC
Home Health
7777 BONHOMME AVE
SAINT LOUIS, MO 63105
St. Louis County (618) 334-7590
NEXT LEVEL PSYCHIATRY LLC
Nurse Practitioner (Psychiatric/Mental Health)
7777 BONHOMME AVE
CLAYTON, MO 63105
St. Louis County (315) 547-0502
BRIANA SMITH
Home Health
7777 BONHOMME AVE
CLAYTON, MO 63105
St. Louis County (314) 986-7977

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mary Williamson's NPI number?

The NPI number for Mary Williamson is 1003130865. It was assigned to this individual provider in the NPPES registry on March 23, 2010.

Where is Mary Williamson located?

Mary Williamson practices at 7777 Bonhomme Ave Suite 909, Saint Louis, MO 63105. The listed phone number is (800) 356-0845.

What is Mary Williamson's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Professional, with taxonomy code 101YP2500X.

When was this NPI record last updated?

The NPPES record for Mary Williamson was last updated on March 23, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.