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ISABELLA YUMI CHAI PMHNP-BC
NPI 1336792209
Nurse Practitioner - Psychiatric/Mental Health in Pomona, CA

Active since July 19, 2019PECOS EnrolledAccepts Medicare Assignment
2008 N GAREY AVE, POMONA, CA 91767(909) 623-6131(909) 865-9281 Get Directions Write a Review

NPPES record last updated: January 6, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jan 6, 2026, Apr 11, 2024, Jul 19, 2019 (3 updates tracked since 2019).

About Isabella Yumi Chai Pmhnp-bc NPPES

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

ISABELLA YUMI CHAI PMHNP-BC (NPI 1336792209) is an individual psychiatric/mental health provider in Pomona, California, licensed in California (95011968) and active in the NPI registry since July 2019. She is enrolled in Medicare PECOS and is a graduate of Other (2019).

NPPES Registry Identity

NPI1336792209
Entity TypeIndividualFemale
Primary Taxonomy363LP0808X
Provider Legal NameISABELLA YUMI CHAICredential: PMHNP-BC
Location Address2008 N GAREY AVEPomona, CA 91767-2722
Mailing Address2008 N Garey AvePomona, CA 91767-2722 · (909) 623-6131 · Fax (909) 865-9281
Phone(909) 623-6131
Fax(909) 865-9281
Sole ProprietorNo
Medical School CMSOtherGraduated 2019
Enumeration DateJuly 19, 2019
Last NPPES UpdateJanuary 6, 20263 updates tracked since enumeration
NPPES CertifiedJanuary 6, 2026
✔ NPI 1336792209 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · Psychiatric/Mental HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LP0808X
License✔ Licensed in CA · 95011968
2008 N GAREY AVE, Pomona, CA 91767
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 and accepts Medicare assignment

Isabella Yumi Chai Pmhnp-bc 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 ID6305177312
PECOS Enrollment IDI20191004002883
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.

Medicare Billing Reassignments

2

Medicare enrollment records show Isabella Chai reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Tri-City Mental Health Authority
Same address
Community/Behavioral Health
2008 N GAREY AVE
Pomona, CA 91767
  • Reassigned Medicare billing, California enrollment
  • 40 clinicians in this Medicare group
NPI 1346304920 (909) 623-6131
Faculty Physicians And Surgeons Of Llusm
5.9 mi
Pediatrics
2140 GRAND AVE, STE 120
Chino Hills, CA 91709
  • Reassigned Medicare billing, California enrollment
  • 2,584 clinicians in this Medicare group
NPI 1811205131 (909) 558-3111

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91767 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 20

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

MARIA CAROLINA OUSTAD
Rehabilitation Practitioner
2008 N GAREY AVE
POMONA, CA 91767
Los Angeles County (909) 784-3236
KWONTA PHATIPHONG
Marriage & Family Therapist
2008 N GAREY AVE
POMONA, CA 91767
Los Angeles County (909) 623-6131
ADDISON HAWTHORNE
Social Worker (Clinical)
2008 N GAREY AVE
POMONA, CA 91767
Los Angeles County (909) 623-6131
DR. CARLOS A MURALLES M.D.
Psychiatry & Neurology (Psychiatry)
2008 N GAREY AVE
POMONA, CA 91767
Los Angeles County (909) 623-6131
KIRANDEEP SANDHU
Psychiatry & Neurology (Psychiatry)
2008 N GAREY AVE
POMONA, CA 91767
Los Angeles County (909) 623-6131
KRISTI ROMERO
Peer Specialist
2008 N GAREY AVE
POMONA, CA 91767
Los Angeles County (909) 623-6131
SAMANTHA RITA KOEMANS
Student in an Organized Health Care Education/Training Program
2008 N GAREY AVE
POMONA, CA 91767
Los Angeles County (909) 623-6131
ROBERT PAUL HIJAR
Community Health Worker
2008 N GAREY AVE
POMONA, CA 91767
Los Angeles County (909) 539-7729

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 Isabella Chai's NPI number?

The NPI number for Isabella Chai is 1336792209. It was assigned to this individual provider in the NPPES registry on July 19, 2019.

Where is Isabella Chai located?

Isabella Chai practices at 2008 N Garey Ave, Pomona, CA 91767. The listed phone number is (909) 623-6131.

What is Isabella Chai's specialty?

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

Is Isabella Chai enrolled in Medicare?

Yes. Isabella Chai 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.

Which organizations bill Medicare for Isabella Chai's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Isabella Chai reassigns Medicare benefits to 2 organizations: Tri-City Mental Health Authority (Pomona, CA) and Faculty Physicians And Surgeons Of Llusm (Chino Hills, CA). Each 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 Isabella Chai'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 Isabella Chai was last updated on January 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.