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JOY SANTILLANA DIORES NP
NPI 1689337776
Nurse Practitioner - Psychiatric/Mental Health in West Covina, CA

Active since October 16, 2021PECOS EnrolledAccepts Medicare Assignment
100 N BARRANCA ST STE 900, WEST COVINA, CA 91791(626) 206-0523(626) 206-0553 Get Directions Write a Review

NPPES record last updated: March 20, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Mar 20, 2026, Oct 10, 2023, Oct 6, 2023 and 2 more (5 updates tracked since 2021).

About Joy Santillana Diores Np NPPES

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

JOY SANTILLANA DIORES NP (NPI 1689337776) is an individual psychiatric/mental health provider in West Covina, California, licensed in California (95019494) and active in the NPI registry since October 2021. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Other (2021).

NPPES Registry Identity

NPI1689337776
Entity TypeIndividualFemale
Primary Taxonomy363LP0808X
Provider Legal NameJOY SANTILLANA DIORESCredential: NP
Location Address100 N BARRANCA ST STE 900West Covina, CA 91791-1637
Mailing Address15519 Crenshaw BlvdGardena, CA 90249-4597
Phone(626) 206-0523
Fax(626) 206-0553
Sole ProprietorYes
Medical School CMSOtherGraduated 2021
Enumeration DateOctober 16, 2021
Last NPPES UpdateMarch 20, 20265 updates tracked since enumeration
NPPES CertifiedMarch 20, 2026
✔ NPI 1689337776 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse Practitioner · Psychiatric/Mental HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LP0808X
License✔ Licensed in CA · 95019494
Also ListedRegistered NurseTaxonomy 163W00000X · License 95073474 (CA)
100 N BARRANCA ST STE 900, West Covina, CA 91791
Open in Google Maps ↗

Secondary Practice Locations 2

Location 11100 W Stewart DrOrange, CA 92868-3849 · Phone (714) 771-8000
Location 215519 Crenshaw BlvdGardena, CA 90249-4597 · Phone (714) 716-1830

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas, Providence Health Plan.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Joy Santillana Diores Np is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3678930062
PECOS Enrollment IDI20230530002165
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 6

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 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.
145 services77 patients
Assessment of emotional or behavioral problems 96127
Assessment of emotional or behavioral problems involves a thorough evaluation of your feelings, thoughts, and behaviors. It's a process where professionals study patterns over time to identify potential issues like anxiety, depression, or other mental health conditions.
90 services53 patients
Psychotherapy with evaluation and management visit, 30 minutes 90833
Psychotherapy with evaluation and management is a 30-minute session where a mental health professional talks with you about your concerns and feelings. They assess your mental health, provide support, and manage your treatment plan to help improve your well-being.
79 services58 patients
Psychiatric diagnostic evaluation with medical services 90792
A psychiatric diagnostic evaluation with medical services is a comprehensive assessment. It includes a detailed examination of your mental health and physical wellbeing, as well as your personal and family history. This evaluation aids in creating an effective treatment plan.
45 services44 patients
Psychiatric diagnostic evaluation 90791
A psychiatric diagnostic evaluation is a thorough assessment used to identify any mental health conditions you may have. It involves a detailed discussion about your symptoms, thoughts, feelings and behavior patterns. Your medical history and family's mental health history are also considered.
29 services29 patients
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212
This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.
23 services18 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91791 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.

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.

MRS. EVANGELINE BAQUIRAN PELAEZ ANP-BC
Nurse Practitioner (Adult Health)
100 N BARRANCA ST STE 900
WEST COVINA, CA 91791
Los Angeles County (626) 206-0523
MICHAEL JOHN PANCHO BUNAG NP
Nurse Practitioner
100 N BARRANCA ST STE 900
WEST COVINA, CA 91791
Los Angeles County (626) 206-0523

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 Joy Diores's NPI number?

The NPI number for Joy Diores is 1689337776. It was assigned to this individual provider in the NPPES registry on October 16, 2021.

Where is Joy Diores located?

Joy Diores practices at 100 N Barranca St Ste 900, West Covina, CA 91791. The listed phone number is (626) 206-0523.

What is Joy Diores's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.

Is Joy Diores enrolled in Medicare?

Yes. Joy Diores is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Joy Diores accept?

Health plans from Blue Cross and Blue Shield of Texas and Providence Health Plan list Joy Diores as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Joy Diores was last updated on March 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.