Alexander Marks
NPI 1144748914 · Counselor · Saint Louis, MO
Enrolled with Medicare as Practitioner - Mental Health Counselor · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alexander Marks is a Counselor provider in Saint Louis, MO (NPI 1144748914).
Provider details
- NPI number
- 1144748914
- Entity type
- Individual
- Primary specialty
- CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
8 yrs in NPPES registry
- Profile completeness38% of score
83% 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
Mailing address
Registry dates
- Enumerated
- 2017-08-31
- Last updated
- 2025-11-06
- Certified
- 2025-11-06
Frequently asked questions
- What is Alexander Marks's NPI number?
- Alexander Marks's National Provider Identifier (NPI) is 1144748914, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alexander Marks's specialty?
- Alexander Marks is listed in the NPPES registry with a primary specialty of Counselor (Behavioral Health & Social Service Providers).
- Where is Alexander Marks located?
- Alexander Marks's practice location on file with NPPES is 2190 S Mason Rd Ste 311, Saint Louis, MO 63131-1639.
- What is Alexander Marks's phone number?
- The practice phone number listed in the NPPES registry for Alexander Marks is (636) 300-9333.
- Does Alexander Marks accept Medicare?
- Alexander Marks is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alexander Marks's NPI active?
- Yes — Alexander Marks's NPI (1144748914) is active in the NPPES registry as of the last update on 2025-11-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.