WILLIAM CASAS
NPI 1477998615
Family Medicine in La Verne, CA

Q: What is William Casas's NPI number?

The NPI number for William Casas is 1477998615. It was assigned to this individual provider in the NPPES registry on May 1, 2013.

Q: What is William Casas's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Q: When was this NPI record last updated?

The NPPES record for William Casas was last updated on February 25, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months 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.

Active since May 01, 2013PECOS Enrolled

2333 FOOTHILL BLVD STE B, LA VERNE, CA 91750(909) 392-6501(909) 469-2136 Get Directions Write a Review

NPPES record last updated: February 25, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Mar 7, 2023, Jul 14, 2022, Dec 30, 2021 (3 updates tracked since 2021).

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About William Casas NPPES

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

WILLIAM CASAS (NPI 1477998615) is an individual family medicine provider in La Verne, California, licensed in California (A139442) and active in the NPI registry since May 2013. He is enrolled in Medicare PECOS and is a graduate of Other (1996).

NPPES Registry Identity

NPI1477998615

Entity TypeIndividualMale

Primary Taxonomy207Q00000X

Provider Legal NameWILLIAM CASAS

Location Address2333 FOOTHILL BLVD STE BLa Verne, CA 91750-3027

Mailing Address2333 Foothill Blvd Ste BLa Verne, CA 91750-3027 · (909) 392-6501 · Fax (909) 469-2136

Phone(909) 392-6501

Fax(909) 469-2136

Sole ProprietorNo

Medical School CMSOtherGraduated 1996

Enumeration DateMay 1, 2013

Last NPPES UpdateFebruary 25, 20263 updates tracked since enumeration

NPPES CertifiedFebruary 25, 2026

✔ NPI 1477998615 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207Q00000X

License✔ Licensed in CA · A139442

Definition

Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.

2333 FOOTHILL BLVD STE B, La Verne, CA 91750

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Other Identifiers 1

Medicaid1477998615CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

William Casas is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID1557502499

PECOS Enrollment IDI20160620002353

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 5

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

250 services139 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

50 services20 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

20 services20 patients

Hospital discharge day management, 30 minutes or less 99238

Hospital discharge day management of 30 minutes or less includes finalizing your treatment, discussing your progress, and planning after-care at home. It ensures you're ready to leave the hospital and continue recovery safely.

18 services17 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

13 services13 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91750 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$96.36 typical visit price

range $62.96 – $187.60

Typical copayment $24.09 (range $15.74 – $46.90)

Most-billed visit code 99203

Established Patient

$109.96 typical visit price

range $20.84 – $153.61

Typical copayment $27.49 (range $5.21 – $38.40)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253

DME-Other DME · category DE017N

9 suppliers18 claims43 services$6.62 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 10

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

PREMIER FAMILY MEDICINE ASSOCIATES, INC

Clinic/Center (Health Service)