1. Home
  2. Directory
  3. California
  4. San Diego
  5. Speech Language Pathologist
  6. NPI Profile

DR. LOIS TRUDEAU ENGELHARDT SLPD, CCC-SLP
NPI 1538670674
Speech-Language Pathologist in San Diego, CA

Active since October 17, 2017
4909 MURPHY CANYON RD STE 310, SAN DIEGO, CA 92123(800) 787-6787(858) 429-7992 Get Directions Write a Review

NPPES record last updated: April 25, 2020. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Apr 25, 2020, Oct 17, 2017 (2 updates tracked since 2017).

About Dr. Lois Trudeau Engelhardt Slpd, Ccc-slp NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. LOIS TRUDEAU ENGELHARDT SLPD, CCC-SLP (NPI 1538670674) is an individual speech-language pathologist provider in San Diego, California and active in the NPI registry since October 2017. She is a graduate of Other (2019).

NPPES Registry Identity

NPI1538670674
Entity TypeIndividualFemale
Primary Taxonomy235Z00000X
Provider Legal NameDR. LOIS TRUDEAU ENGELHARDTCredential: SLPD, CCC-SLP
Location Address4909 MURPHY CANYON RD STE 310San Diego, CA 92123-4301
Mailing Address1817 Dewayne AveCamarillo, CA 93010-3819
Phone(800) 787-6787
Fax(858) 429-7992
Sole ProprietorNo
Medical School CMSOtherGraduated 2019
Enumeration DateOctober 17, 2017
Last NPPES UpdateApril 25, 20202 updates tracked since enumeration
NPPES CertifiedApril 25, 2020
✔ NPI 1538670674 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpeech-Language PathologistSpeech, Language and Hearing Service Providers
Taxonomy Code235Z00000X
Definition
The speech-language pathologist is the professional who engages in clinical services, prevention, advocacy, education, administration, and research in the areas of communication and swallowing across the life span from infancy through geriatrics. Speech-language pathologists address typical and atypical impairments and disorders related to communication and swallowing in the areas of speech sound production, resonance, voice, fluency, language (comprehension and expression), cognition, and feeding and swallowing.
4909 MURPHY CANYON RD STE 310, San Diego, CA 92123
Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Lois Trudeau Engelhardt Slpd, Ccc-slp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID6204318207
PECOS Enrollment IDI20260306003021

Medicare Billing Reassignment

Medicare enrollment records show Lois Engelhardt reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Reliant Senior Living LLC
5.2 mi
Physical Therapist
5308 MONROE AVE
San Diego, CA 92115
  • Reassigned Medicare billing, California enrollment
  • 29 clinicians in this Medicare group
NPI 1134001779 (877) 889-5188

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

EMILY JOAN GAMBOA SLP-CCC
Speech-Language Pathologist
4909 MURPHY CANYON RD STE 310
SAN DIEGO, CA 92123
San Diego County (323) 377-5303
ANNETTE H KIM OTR/L
Occupational Therapist
4909 MURPHY CANYON RD STE 310
SAN DIEGO, CA 92123
San Diego County (818) 367-1057

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Lois Engelhardt's NPI number?

The NPI number for Lois Engelhardt is 1538670674. It was assigned to this individual provider in the NPPES registry on October 17, 2017.

Where is Lois Engelhardt located?

Lois Engelhardt practices at 4909 Murphy Canyon Rd Ste 310, San Diego, CA 92123. The listed phone number is (800) 787-6787.

What is Lois Engelhardt's specialty?

The primary specialty registered for this NPI is Speech-Language Pathologist with taxonomy code 235Z00000X.

Is Lois Engelhardt enrolled in Medicare?

Yes. Lois Engelhardt is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Lois Engelhardt's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Lois Engelhardt reassigns Medicare benefits to Reliant Senior Living LLC (San Diego, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Lois Engelhardt's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Lois Engelhardt was last updated on April 25, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.