IndividualActive
Mary Williamson
NPI 1003130865 · Professional Counselor · Saint Louis, MO
Mary Williamson is a Professional Counselor provider in Saint Louis, MO (NPI 1003130865).
Provider details
- NPI number
- 1003130865
- Entity type
- Individual
- Primary specialty
- Professional CounselorBehavioral Health & Social Service Providers
- Sex
- Female
- Sole proprietor
- Yes
- License
- 001837 (MO)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(84/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
16 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
7777 Bonhomme Ave
Suite 909
Saint Louis, MO 63105-1911
Phone: (800) 356-0845
Street-level locationGet directions
Mailing address
9735 Landmark Parkway Dr
Saint Louis, MO 63127-1646
Registry dates
- Enumerated
- 2010-03-23
- Last updated
- 2010-03-23
Frequently asked questions
- What is Mary Williamson's NPI number?
- Mary Williamson's National Provider Identifier (NPI) is 1003130865, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Williamson's specialty?
- Mary Williamson is listed in the NPPES registry with a primary specialty of Professional Counselor (Behavioral Health & Social Service Providers).
- Where is Mary Williamson located?
- Mary Williamson's practice location on file with NPPES is 7777 Bonhomme Ave, Saint Louis, MO 63105-1911.
- What is Mary Williamson's phone number?
- The practice phone number listed in the NPPES registry for Mary Williamson is (800) 356-0845.
- Is Mary Williamson's NPI active?
- Yes — Mary Williamson's NPI (1003130865) is active in the NPPES registry as of the last update on 2010-03-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.