Jeffrey Marx, MA
NPI 1154214435 · Professional Counselor · Saint Louis, MO
Jeffrey Marx, MA is a Professional Counselor provider in Saint Louis, MO (NPI 1154214435).
Provider details
- NPI number
- 1154214435
- Entity type
- Individual
- Primary specialty
- Professional CounselorBehavioral Health & Social Service Providers
- Credential
- MA
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Behavioral Health & Social Service Providers
- Marriage & Family Therapist106H00000X
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
1 yr in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 8240 Saint Charles Rock RdSaint Louis, MO 63114-4508Phone: (314) 427-3755
Registry dates
- Enumerated
- 2025-06-03
- Last updated
- 2025-06-03
- Certified
- 2025-06-03
Frequently asked questions
- What is Jeffrey Marx's NPI number?
- Jeffrey Marx's National Provider Identifier (NPI) is 1154214435, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jeffrey Marx's specialty?
- Jeffrey Marx is listed in the NPPES registry with a primary specialty of Professional Counselor (Behavioral Health & Social Service Providers).
- Where is Jeffrey Marx located?
- Jeffrey Marx's practice location on file with NPPES is 9666 Olive Blvd, Saint Louis, MO 63132-3013.
- What is Jeffrey Marx's phone number?
- The practice phone number listed in the NPPES registry for Jeffrey Marx is (636) 323-9979.
- Is Jeffrey Marx's NPI active?
- Yes — Jeffrey Marx's NPI (1154214435) is active in the NPPES registry as of the last update on 2025-06-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.