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Thalia Guillen, ACSW
NPI 1851063697 · Mental Health Counselor · Merced, CA
Thalia Guillen, ACSW is a Mental Health Counselor provider in Merced, CA (NPI 1851063697).
Provider details
- NPI number
- 1851063697
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Credential
- ACSW
- Sex
- Female
- Sole proprietor
- No
- License
- 103266 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Established profile(71/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
4 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
10 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
1640 N St
Merced, CA 95340-4657
Phone: (209) 381-4547
Street-level locationGet directions
Mailing address
1640 N St
Merced, CA 95340-4657
Additional practice locations (9)
- 13071 E. Le Grand RoadLe Grand, CA 95333Phone: (209) 389-4515
- 9722 Haskell AvenuePlanada, CA 95365Phone: (209) 382-0756
- 161 S. Plainsburg RoadPlanada, CA 95365Phone: (209) 382-0768
- 9525 E. Broderick StreetPlanada, CA 95365Phone: (209) 382-0272
- 7265 Almond AveWinton, CA 95388-9325Phone: (209) 357-6180
- 7000 N. Center StreetWinton, CA 95388-9399Phone: (209) 357-6175
- 7160 W. Walnut AvenueWinton, CA 95388Phone: (209) 357-6182
- 6981 Chestnut LaneWinton, CA 95388Phone: (209) 357-6891
- 6300 Cypress AveWinton, CA 95388-9547Phone: (209) 357-6189
Registry dates
- Enumerated
- 2021-09-30
- Last updated
- 2025-11-19
- Certified
- 2025-11-19
Frequently asked questions
- What is Thalia Guillen's NPI number?
- Thalia Guillen's National Provider Identifier (NPI) is 1851063697, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thalia Guillen's specialty?
- Thalia Guillen is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is Thalia Guillen located?
- Thalia Guillen's practice location on file with NPPES is 1640 N St, Merced, CA 95340-4657.
- What is Thalia Guillen's phone number?
- The practice phone number listed in the NPPES registry for Thalia Guillen is (209) 381-4547.
- Is Thalia Guillen's NPI active?
- Yes — Thalia Guillen's NPI (1851063697) is active in the NPPES registry as of the last update on 2025-11-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.