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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

ALLEN CHEN
NPI 1073203295
Internal Medicine in Loma Linda, CA

Active since May 10, 2023PECOS Enrolled
11234 ANDERSON ST, LOMA LINDA, CA 92350(909) 558-4000 Get Directions Write a Review

NPPES record last updated: September 14, 2026. Verified against the NPPES registry weekly; last sync: September 20, 2026.

Record update history: Sep 14, 2026, Aug 19, 2026, May 10, 2023 (3 updates tracked since 2023).

About Allen Chen NPPES

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

ALLEN CHEN (NPI 1073203295) is an individual internal medicine provider in Loma Linda, California, licensed in California (A208138) and active in the NPI registry since May 2023. He is enrolled in Medicare PECOS and is a graduate of Other (2023).

NPPES Registry Identity

NPI1073203295
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameALLEN CHEN
Location Address11234 ANDERSON STLoma Linda, CA 92350-1716
Mailing Address9350 The Resort Pkwy Unit 3723Rancho Cucamonga, CA 91730-9236
Phone(909) 558-4000
Sole ProprietorNo
Medical School CMSOtherGraduated 2023
Enumeration DateMay 10, 2023
Last NPPES UpdateSeptember 14, 20263 updates tracked since enumeration
NPPES CertifiedSeptember 14, 2026
✔ NPI 1073203295 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 · A208138
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.
11234 ANDERSON ST, Loma Linda, CA 92350
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

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

PECOS PAC ID9436517380
PECOS Enrollment IDI20260729000189
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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92350 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
$136.04 typical visit price
range $59.60 – $179.42
Typical copayment $34.01 (range $14.90 – $44.85)
Most-billed visit code 99204
Established Patient
$104.64 typical visit price
range $19.37 – $146.42
Typical copayment $26.16 (range $4.84 – $36.60)
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.

DR. THUCAN TIMOTHY BUI DO
Emergency Medicine
11234 ANDERSON ST
LOMA LINDA, CA 92350
San Bernardino County (909) 558-4344
VAHE YACOUBIAN MD, MPH
Orthopaedic Surgery
11234 ANDERSON ST
LOMA LINDA, CA 92350
San Bernardino County (818) 813-4234
AISHA Q EALEY APRN, ACCCNS-N
Clinical Nurse Specialist (Neonatal)
11234 ANDERSON ST
LOMA LINDA, CA 92350
San Bernardino County (909) 558-4248
MR. RANDAL KEITH GILMAN PA
Physician Assistant
11234 ANDERSON ST
LOMA LINDA, CA 92350
San Bernardino County (909) 558-4475
AMR AZZAM MD, PHD
Ophthalmology (Retina Specialist)
11234 ANDERSON ST
LOMA LINDA, CA 92350
San Bernardino County (909) 558-2182
DARSH THAKRAR M.D.
Radiology (Diagnostic Radiology)
11234 ANDERSON ST
LOMA LINDA, CA 92350
San Bernardino County (909) 558-4000
HAITHAM SIAG MBBCH
Student in an Organized Health Care Education/Training Program
11234 ANDERSON ST
LOMA LINDA, CA 92350
San Bernardino County (914) 267-6104
PRESTON ANDREW SHIRSAT
Student in an Organized Health Care Education/Training Program
11234 ANDERSON ST
LOMA LINDA, CA 92350
San Bernardino County (909) 558-4074

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 Chen's NPI number?

The NPI number for Allen Chen is 1073203295. It was assigned to this individual provider in the NPPES registry on May 10, 2023.

Where is Allen Chen located?

Allen Chen practices at 11234 Anderson St, Loma Linda, CA 92350. The listed phone number is (909) 558-4000.

What is Allen Chen's specialty?

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

Is Allen Chen enrolled in Medicare?

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

When was this NPI record last updated?

The NPPES record for Allen Chen was last updated on September 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 days 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.