Vivian Sierra, PH.D. LMFT
NPI 1639199854 · Marriage & Family Therapist · Belleville, IL
Vivian Sierra, PH.D. LMFT is a Marriage & Family Therapist provider in Belleville, IL (NPI 1639199854).
Provider details
- NPI number
- 1639199854
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- PH.D. LMFT
- Sex
- Female
- 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
19 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
- 2006-07-20
- Last updated
- 2007-07-08
Frequently asked questions
- What is Vivian Sierra's NPI number?
- Vivian Sierra's National Provider Identifier (NPI) is 1639199854, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Vivian Sierra's specialty?
- Vivian Sierra is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Vivian Sierra located?
- Vivian Sierra's practice location on file with NPPES is 6609 W Main St, Belleville, IL 62223-3025.
- What is Vivian Sierra's phone number?
- The practice phone number listed in the NPPES registry for Vivian Sierra is (618) 398-6552.
- Is Vivian Sierra's NPI active?
- Yes — Vivian Sierra's NPI (1639199854) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.