What is William Mueller's NPI number?

William Mueller's National Provider Identifier (NPI) is 1639984958, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is William Mueller's specialty?

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

Where is William Mueller located?

William Mueller's practice location on file with NPPES is 4221 Wilshire Blvd Ste 300a, Los Angeles, CA 90010-3537.

What is William Mueller's phone number?

The practice phone number listed in the NPPES registry for William Mueller is (888) 428-3223.

Is William Mueller's NPI active?

Yes — William Mueller's NPI (1639984958) is active in the NPPES registry as of the last update on 2025-02-12.

IndividualActive

William Mueller

NPI 1639984958 · Behavior Technician · Los Angeles, CA

William Mueller is a Behavior Technician provider in Los Angeles, CA (NPI 1639984958).

Provider details

NPI number: 1639984958
Entity type: Individual
Primary specialty: Behavior TechnicianBehavioral Health & Social Service Providers
Sex: Male
Sole proprietor: No

Specialties & taxonomies

Behavior TechnicianPrimary106S00000X
Behavioral Health & Social Service Providers

Profile Score

Basic profile(49/100 index)

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
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

4221 Wilshire Blvd Ste 300a

Los Angeles, CA 90010-3537

Phone: (888) 428-3223

Fax: (323) 866-1881

Street-level locationGet directions

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Mailing address