Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

William Casas

Individual provider Family Medicine Physician · NPI 1477998615

William Casas is registered under Family Practice in LA Verne, California. Qualified in 1996, 30 years ago. Practices with Premier Family Medicine Associates, Inc, a 65-clinician group and offers telehealth. Licensed in California.

Years since qualifying
30
Licensed in
CA
In the registry since
2013
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Practice location Address checks out

2333 Foothill Blvd Ste B
LA Verne, CA 91750-3027
Phone: (909) 392-6501
Fax: (909) 469-2136
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence A139442 (CA)

Record details

NPI number1477998615
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedMay 1, 2013
Last updated in NPPESFebruary 25, 2026
Certification dateFebruary 25, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyFAMILY PRACTICE
Medical schoolOTHER
Graduated 1996 (30 years in practice)
Group practice Premier Family Medicine Associates, Inc — 65 clinicians
Accepts Medicare assignment Not indicated
TelehealthOffers telehealth services

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Removal of skin lesions 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients197
Services billed 636 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Premier Family Medicine Associates, Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 65 clinicians in the practice; 12 are shown here.

Other providers in LA Verne