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AI XIN CHEN
NPI 1982231270
Emergency Medicine in Torrance, CA

Active since March 25, 2020PECOS EnrolledAccepts Medicare Assignment
1000 W CARSON ST, TORRANCE, CA 90502(310) 222-3501(310) 782-1763 Get Directions Write a Review

NPPES record last updated: March 28, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Mar 28, 2025, Jun 5, 2023, Mar 27, 2020 (3 updates tracked since 2020).

About Ai Xin Chen NPPES

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

AI XIN CHEN (NPI 1982231270) is an individual emergency medicine provider in Torrance, California, licensed in California (A181416) and active in the NPI registry since March 2020. She is enrolled in Medicare PECOS and is a graduate of Other (2020).

NPPES Registry Identity

NPI1982231270
Entity TypeIndividualFemale
Primary Taxonomy207P00000X
Provider Legal NameAI XIN CHEN
Location Address1000 W CARSON STTorrance, CA 90502-2004
Mailing Address1945 Eastchester Rd Apt 20eBronx, NY 10461-2111 · (317) 523-3553 · Fax (310) 782-1763
Phone(310) 222-3501
Fax(310) 782-1763
Sole ProprietorNo
Medical School CMSOtherGraduated 2020
Enumeration DateMarch 25, 2020
Last NPPES UpdateMarch 28, 20253 updates tracked since enumeration
NPPES CertifiedMarch 28, 2025
✔ NPI 1982231270 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in CA · A181416
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
1000 W CARSON ST, Torrance, CA 90502
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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 and accepts Medicare assignment

Ai Xin Chen 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 ID2860856663
PECOS Enrollment IDI20230913000143
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 Ai Xin Chen reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Emergency Specialist Physicians Medical Associates, Inc
3.8 mi
Emergency Medicine
4101 TORRANCE BLVD, ER DEPT
Torrance, CA 90503
  • Reassigned Medicare billing, California enrollment
  • 69 clinicians in this Medicare group
NPI 1518917913 (310) 303-5600
County Of Los Angeles
7.0 mi
Clinic/Center
1670 E 120TH ST
Los Angeles, CA 90059
  • Reassigned Medicare billing, California enrollment
  • 435 clinicians in this Medicare group
NPI 1780877613 (310) 668-5201

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

Areas of Expertise CMS Part B claims 3

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.

Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
42 services42 patients
Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
37 services37 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010
A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.
25 services25 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90502 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.

MISS BRITTANY IRVINE M.A.
Student in an Organized Health Care Education/Training Program
1000 W CARSON ST
TORRANCE, CA 90502
Los Angeles County (310) 222-2345
DEPAREMENT OF MANTAL HEALTH
Case Management
1000 W CARSON ST
TORRANCE, CA 90502
Los Angeles County (310) 222-1648
DINA M MEZA
Nurse Practitioner (Family)
1000 W CARSON ST, HEAD AND NECK BOX 6
TORRANCE, CA 90502
Los Angeles County (310) 222-2741
MARIA GUADALUPE VALADEZ
Student in an Organized Health Care Education/Training Program
1000 W CARSON ST
TORRANCE, CA 90502
Los Angeles County (559) 789-1327
ESTEBAN COTA
Specialist
1000 W CARSON ST
TORRANCE, CA 90502
Los Angeles County (310) 222-2345
MS. DAWN MARIE TLUSTY RN
Registered Nurse (Infusion Therapy)
1000 W CARSON ST
TORRANCE, CA 90502
Los Angeles County (310) 222-1906
DR. NICOLE MOORE MD
Student in an Organized Health Care Education/Training Program
1000 W CARSON ST
TORRANCE, CA 90502
Los Angeles County (310) 222-2345
KENTON YUJI SAKURAI
Psychiatry & Neurology (Psychiatry)
1000 W CARSON ST
TORRANCE, CA 90502
Los Angeles County (424) 306-4000

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 Ai Xin Chen's NPI number?

The NPI number for Ai Xin Chen is 1982231270. It was assigned to this individual provider in the NPPES registry on March 25, 2020.

Where is Ai Xin Chen located?

Ai Xin Chen practices at 1000 W Carson St, Torrance, CA 90502. The listed phone number is (310) 222-3501.

What is Ai Xin Chen's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Ai Xin Chen enrolled in Medicare?

Yes. Ai Xin Chen 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 Ai Xin Chen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ai Xin Chen reassigns Medicare benefits to 2 organizations: Emergency Specialist Physicians Medical Associates, Inc (Torrance, CA) and County Of Los Angeles (Los Angeles, 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 Ai Xin Chen'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 Ai Xin Chen was last updated on March 28, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.