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ALLEN ONIZUKA MD
NPI 1811258940
Internal Medicine in Baldwin Park, CA

Active since June 05, 2012PECOS Enrolled
1011 BALDWIN PARK BLVD, BALDWIN PARK, CA 91706(626) 851-1011 Get Directions Write a Review

NPPES record last updated: November 29, 2021. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Nov 29, 2021, Nov 25, 2020 (2 updates tracked since 2020).

About Allen Onizuka Md NPPES

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

ALLEN ONIZUKA MD (NPI 1811258940) is an individual internal medicine provider in Baldwin Park, California, licensed in California (A124965) and active in the NPI registry since June 2012. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1811258940
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameALLEN ONIZUKACredential: MD
Location Address1011 BALDWIN PARK BLVDBaldwin Park, CA 91706-5806
Mailing Address1011 Baldwin Park BlvdBaldwin Park, CA 91706-5806
Phone(626) 851-1011
Sole ProprietorYes
Enumeration DateJune 5, 2012
Last NPPES UpdateNovember 29, 20212 updates tracked since enumeration
NPPES CertifiedNovember 29, 2021
✔ NPI 1811258940 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A124965
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
1011 BALDWIN PARK BLVD, Baldwin Park, CA 91706
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Allen Onizuka Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Reassignment

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

Southern California Permanente Medical Group
Same address
Health Maintenance Organization
1011 BALDWIN PARK BLVD
Baldwin Park, CA 91706
  • Reassigned Medicare billing, California enrollment
  • 13,921 clinicians in this Medicare group
NPI 1770515280 (626) 851-1011

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 91706 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
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
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.

BRETT ALLEN PROVENCE D.O.
Hospitalist
1011 BALDWIN PARK BLVD, 4 EAST HOSPITALIST OFFICE
BALDWIN PARK, CA 91706
Los Angeles County (626) 851-1011
VERONICA CHIU TSANG RRT
Respiratory Therapist, Registered
1011 BALDWIN PARK BLVD
BALDWIN PARK, CA 91706
Los Angeles County (626) 851-7245
DANIEL CHU MD
Family Medicine
1011 BALDWIN PARK BLVD
BALDWIN PARK, CA 91706
Los Angeles County (833) 574-2273
JULIAN REED WOODS MD
Emergency Medicine
1011 BALDWIN PARK BLVD
BALDWIN PARK, CA 91706
Los Angeles County (626) 851-1011
HLA H. KYI MD
Pediatrics
1011 BALDWIN PARK BLVD
BALDWIN PARK, CA 91706
Los Angeles County (626) 851-1011
YU-CHIEN KUO MD
Family Medicine
1011 BALDWIN PARK BLVD
BALDWIN PARK, CA 91706
Los Angeles County (626) 851-1011
CHRISTINE YI-JING CHEN-HSU MD
Physical Medicine & Rehabilitation
1011 BALDWIN PARK BLVD
BALDWIN PARK, CA 91706
Los Angeles County (626) 851-1011
DAVID OREN DEWITT PA
Physician Assistant
1011 BALDWIN PARK BLVD
BALDWIN PARK, CA 91706
Los Angeles County (626) 851-1011

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 Allen Onizuka's NPI number?

The NPI number for Allen Onizuka is 1811258940. It was assigned to this individual provider in the NPPES registry on June 5, 2012.

Where is Allen Onizuka located?

Allen Onizuka practices at 1011 Baldwin Park Blvd, Baldwin Park, CA 91706. The listed phone number is (626) 851-1011.

What is Allen Onizuka's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Allen Onizuka enrolled in Medicare?

Yes. Allen Onizuka is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Allen Onizuka's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Allen Onizuka reassigns Medicare benefits to Southern California Permanente Medical Group (Baldwin Park, 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 Allen Onizuka'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 Allen Onizuka was last updated on November 29, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.