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DONALD WHANG M.D.
NPI 1922325521
Internal Medicine - Infectious Disease in Torrance, CA

Active since April 23, 2010PECOS EnrolledAccepts Medicare Assignment
23430 HAWTHORNE BLVD STE 200, TORRANCE, CA 90505(310) 784-5880(310) 325-3117 Get Directions Write a Review

NPPES record last updated: December 1, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Dec 1, 2021, Apr 11, 2018, Dec 29, 2016 (3 updates tracked since 2016).

About Donald Whang M.d. NPPES

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

DONALD WHANG M.D. (NPI 1922325521) is an individual infectious disease provider in Torrance, California, licensed in California (118780) and active in the NPI registry since April 2010. He is enrolled in Medicare PECOS and is a graduate of Loma Linda University School Of Medicine (2010).

NPPES Registry Identity

NPI1922325521
Entity TypeIndividualMale
Primary Taxonomy207RI0200X
Provider Legal NameDONALD WHANGCredential: M.D.
Location Address23430 HAWTHORNE BLVD STE 200Torrance, CA 90505-4730
Mailing Address23430 Hawthorne Blvd Ste 200Torrance, CA 90505-4730 · (310) 784-5880 · Fax (310) 325-3117
Phone(310) 784-5880
Fax(310) 325-3117
Sole ProprietorNo
Medical School CMSLoma Linda University School Of MedicineGraduated 2010
Enumeration DateApril 23, 2010
Last NPPES UpdateDecember 1, 20213 updates tracked since enumeration
✔ NPI 1922325521 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RI0200X
License✔ Licensed in CA · 118780
Definition
An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.
23430 HAWTHORNE BLVD STE 200, Torrance, CA 90505
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

Donald Whang M.d. 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 ID7517288806
PECOS Enrollment IDI20150611003149
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 Donald Whang reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Id Med A Medical Corporation
Same address
Specialist
23430 HAWTHORNE BLVD STE 200
Torrance, CA 90505
  • Reassigned Medicare billing, California enrollment
  • 9 clinicians in this Medicare group
NPI 1982635637 (310) 784-5880
Southern California Permanente Medical Group
3.6 mi
Health Maintenance Organization
25825 VERMONT AVE
Harbor City, CA 90710
  • Reassigned Medicare billing, California enrollment
  • 13,921 clinicians in this Medicare group
NPI 1598797011 (310) 325-5111

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 6

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

ID MED
Internal Medicine (Infectious Disease)
23430 HAWTHORNE BLVD STE 200
TORRANCE, CA 90505
Los Angeles County (310) 784-5880
JAMES C DING MD
Internal Medicine
23430 HAWTHORNE BLVD STE 200
TORRANCE, CA 90505
Los Angeles County (310) 784-5880
DR. MONA YAZDI DO
Internal Medicine (Infectious Disease)
23430 HAWTHORNE BLVD STE 200
TORRANCE, CA 90505
Los Angeles County (310) 784-5880
ERIC S YANG MD
Internal Medicine
23430 HAWTHORNE BLVD STE 200
TORRANCE, CA 90505
Los Angeles County (310) 784-5880
JOHN KS CHIA MD
Internal Medicine (Infectious Disease)
23430 HAWTHORNE BLVD STE 200
TORRANCE, CA 90505
Los Angeles County (310) 784-5880
ID MED A MEDICAL CORPORATION
Specialist
23430 HAWTHORNE BLVD STE 200
TORRANCE, CA 90505
Los Angeles County (310) 784-5880

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 Donald Whang's NPI number?

The NPI number for Donald Whang is 1922325521. It was assigned to this individual provider in the NPPES registry on April 23, 2010.

Where is Donald Whang located?

Donald Whang practices at 23430 Hawthorne Blvd Ste 200, Torrance, CA 90505. The listed phone number is (310) 784-5880.

What is Donald Whang's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Is Donald Whang enrolled in Medicare?

Yes. Donald Whang 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 Donald Whang's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Donald Whang reassigns Medicare benefits to 2 organizations: Id Med A Medical Corporation (Torrance, CA) and Southern California Permanente Medical Group (Harbor City, 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 Donald Whang'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 Donald Whang was last updated on December 1, 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.