What is Fatima Guillen's NPI number?

Fatima Guillen's National Provider Identifier (NPI) is 1598623753, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Fatima Guillen's specialty?

Fatima Guillen is listed in the NPPES registry with a primary specialty of Behavior Technician (Behavioral Health & Social Service Providers).

Where is Fatima Guillen located?

Fatima Guillen's practice location on file with NPPES is 1333 S Mayflower Ave, Monrovia, CA 91016-4066.

What is Fatima Guillen's phone number?

The practice phone number listed in the NPPES registry for Fatima Guillen is (818) 241-6780.

Is Fatima Guillen's NPI active?

Yes — Fatima Guillen's NPI (1598623753) is active in the NPPES registry as of the last update on 2026-01-14.

IndividualActive

Fatima Guillen

NPI 1598623753 · Behavior Technician · Monrovia, CA

Fatima Guillen is a Behavior Technician provider in Monrovia, CA (NPI 1598623753).

Provider details

NPI number: 1598623753
Entity type: Individual
Primary specialty: Behavior TechnicianBehavioral Health & Social Service Providers
Sex: Female
Sole proprietor: No

Specialties & taxonomies

Behavior TechnicianPrimary106S00000X
Behavioral Health & Social Service Providers

Profile Score

Basic profile(47/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
Under 1 yr in 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

1333 S Mayflower Ave

Suite 220

Monrovia, CA 91016-4066

Phone: (818) 241-6780

Fax: (888) 588-2752

Street-level locationGet directions

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Mailing address