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ALLEN K CHANG D.O.
NPI 1801239975
Hospitalist in Torrance, CA

Active since April 09, 2013PECOS Enrolled
3330 LOMITA BLVD, HEALTHCARE PARTNERS, TORRANCE, CA 90505(310) 325-9110 Get Directions Write a Review

NPPES record last updated: December 7, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Dec 7, 2025, Sep 13, 2016 (2 updates tracked since 2016).

About Allen K Chang D.o. NPPES

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

ALLEN K CHANG D.O. (NPI 1801239975) is an individual hospitalist provider in Torrance, California, licensed in California (20A13757) and active in the NPI registry since April 2013. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1801239975
Entity TypeIndividualMale
Primary Taxonomy208M00000X
Provider Legal NameALLEN K CHANGCredential: D.O.
Location Address3330 LOMITA BLVD, HEALTHCARE PARTNERSTorrance, CA 90505-5002
Mailing AddressPo Box 35380Las Vegas, NV 89133-5380 · (702) 579-3203
Phone(310) 325-9110
Sole ProprietorNo
Enumeration DateApril 9, 2013
Last NPPES UpdateDecember 7, 20252 updates tracked since enumeration
NPPES CertifiedDecember 7, 2025
✔ NPI 1801239975 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians
Taxonomy Code208M00000X
License✔ Licensed in CA · 20A13757
Definition
Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.
3330 LOMITA BLVD, Torrance, CA 90505
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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 K Chang D.o. 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 Chang reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Healthcare Partners Affiliates Medical Group
16 mi
Internal Medicine
1120 W WASHINGTON BLVD
Los Angeles, CA 90015
  • Reassigned Medicare billing, California enrollment
  • 2,052 clinicians in this Medicare group
NPI 1659312593 (213) 623-2225

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 90505 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.

DANEEN ANN LARECY MSW, LCSW
Social Worker (Clinical)
3330 LOMITA BLVD
TORRANCE, CA 90505
Los Angeles County (310) 784-4983
ALBERT GRABB M.D.
Radiology (Diagnostic Radiology)
3330 LOMITA BLVD
TORRANCE, CA 90505
Los Angeles County (310) 517-4675
DR. GINA L SULMEYER MD
Emergency Medicine
3330 LOMITA BLVD
TORRANCE, CA 90505
Los Angeles County (310) 517-4785
RYAN GLEBER MD, BS
Emergency Medicine
3330 LOMITA BLVD
TORRANCE, CA 90505
Los Angeles County (310) 325-9110
JEANETTE KAYE OKA M.D.
Anesthesiology
3330 LOMITA BLVD
TORRANCE, CA 90505
Los Angeles County (310) 325-9110
DR. RUSSELL DICKERSON M.D.
Radiology (Diagnostic Radiology)
3330 LOMITA BLVD
TORRANCE, CA 90505
Los Angeles County (310) 517-4675
DR. ANDREW SCHUMACHER M.D.
Radiology (Radiation Oncology)
3330 LOMITA BLVD
TORRANCE, CA 90505
Los Angeles County (310) 517-4750
SARAH MCOSKER
Dietitian, Registered
3330 LOMITA BLVD
TORRANCE, CA 90505
Los Angeles County (310) 325-9110

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 Chang's NPI number?

The NPI number for Allen Chang is 1801239975. It was assigned to this individual provider in the NPPES registry on April 9, 2013.

Where is Allen Chang located?

Allen Chang practices at 3330 Lomita Blvd Healthcare Partners, Torrance, CA 90505. The listed phone number is (310) 325-9110.

What is Allen Chang's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Is Allen Chang enrolled in Medicare?

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

Which organization bills Medicare for Allen Chang's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Allen Chang reassigns Medicare benefits to Healthcare Partners Affiliates Medical Group (Los Angeles, 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 Chang'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 Chang was last updated on December 7, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.