Sydney Greenwalt, PHD
NPI 1578305223 · Psychologist · Saint Louis, MO
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sydney Greenwalt, PHD is a Psychologist provider in Saint Louis, MO (NPI 1578305223).
Provider details
- NPI number
- 1578305223
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Female
- Sole proprietor
- No
- License
- 2024019727 (MO)
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
2 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
Mailing address
Registry dates
- Enumerated
- 2024-06-12
- Last updated
- 2024-06-12
- Certified
- 2024-06-12
Frequently asked questions
- What is Sydney Greenwalt's NPI number?
- Sydney Greenwalt's National Provider Identifier (NPI) is 1578305223, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sydney Greenwalt's specialty?
- Sydney Greenwalt is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is Sydney Greenwalt located?
- Sydney Greenwalt's practice location on file with NPPES is 1129 Macklind Ave, Saint Louis, MO 63110-1440.
- What is Sydney Greenwalt's phone number?
- The practice phone number listed in the NPPES registry for Sydney Greenwalt is (314) 289-9411.
- Does Sydney Greenwalt accept Medicare?
- Sydney Greenwalt is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sydney Greenwalt's NPI active?
- Yes — Sydney Greenwalt's NPI (1578305223) is active in the NPPES registry as of the last update on 2024-06-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.