NPI Portal NPI Lookup & Verification

Mr. Christian David Muller I, CADTP CPR

Mr. Christian David Muller I is a Addiction (Substance Use Disorder) Counselor provider (Counselor) practicing in Downey, CA, registered in the NPPES registry with NPI 1821970708 since 2025. Practices at Southern California Alcohol and Drug Programs, Inc. (listed at the same practice address in NPPES).

✓ Active NPI ✓ Valid NPI checksum Sole proprietor

NPI 1821970708
Entity type Individual (Type 1)
Name Mr. Christian David Muller I
Credential CADTP CPR
Sex Male
Practice address Downey, CA, 90241
Phone 5629237894
Enumeration date 2025-07-22
Last updated in NPPES 2025-07-22

Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

Taxonomy code Specialty Primary License State
101YA0400X Addiction (Substance Use Disorder) Counselor Primary 22000 CA
Copy-ready billing details
Provider: Christian Muller, CADTP CPR
NPI: 1821970708
Taxonomy: 101YA0400X (Addiction (Substance Use Disorder) Counselor)
Address: Downey, CA, 90241

Other providers at this practice address

NPI Name Type Specialty Location
1508941170 Southern California Alcohol and Drug Programs, Inc. Organization Children's Substance Abuse Rehabilitation Facility Downey, CA
1609106830 Rosa Rios Individual Marriage & Family Therapist Downey, CA
1174899736 Robert La Vogue Individual Addiction (Substance Use Disorder) Counselor Downey, CA
1164772414 Richard Reilly Individual Addiction (Substance Use Disorder) Counselor Downey, CA
1235483041 Mollie Benavides Individual Addiction (Substance Use Disorder) Counselor Downey, CA
1164894952 Sarah Aguirre Individual Professional Counselor Downey, CA
1538528583 Marcelino Guzman Individual Addiction (Substance Use Disorder) Counselor Downey, CA
1649639543 Joe Martinez Individual Addiction (Substance Use Disorder) Counselor Downey, CA

Verify this record

Cross-check NPI 1821970708 against the authoritative CMS record: view Mr. Christian David Muller I on the official NPPES registry .

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.

Frequently asked questions

What is the NPI number for Christian Muller?
The National Provider Identifier (NPI) for Christian Muller is 1821970708, a Type 1 (individual) record in the CMS NPPES registry.
Where does Christian Muller practice?
The practice location on file with NPPES is in Downey, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2025-07-22.