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DR. CHARLES T CHEN M.D.
NPI 1124050463
Internal Medicine in Redlands, CA

Active since July 07, 2006PECOS Enrolled
236 CAJON ST, REDLANDS, CA 92373(909) 793-3311 Get Directions Write a Review

NPPES record last updated: January 18, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jan 18, 2026, Feb 26, 2020 (2 updates tracked since 2020).

About Dr. Charles T Chen M.d. NPPES

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

DR. CHARLES T CHEN M.D. (NPI 1124050463) is an individual internal medicine provider in Redlands, California, licensed in California (A63693) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and maintains a secondary practice location in Redlands.

NPPES Registry Identity

NPI1124050463
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. CHARLES T CHENCredential: M.D.
Location Address236 CAJON STRedlands, CA 92373-5202
Mailing AddressPo Box 35380Las Vegas, NV 89133-5380 · (702) 579-3203
Phone(909) 793-3311
Sole ProprietorNo
Enumeration DateJuly 7, 2006
Last NPPES UpdateJanuary 18, 20262 updates tracked since enumeration
NPPES CertifiedJanuary 18, 2026
✔ NPI 1124050463 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 · A63693
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.
236 CAJON ST, Redlands, CA 92373
Open in Google Maps ↗

Secondary Practice Location 1

Location 110393 Enterprise DrRedlands, CA 92374-4525 · Phone (909) 799-1818

Other Identifiers 1

Medicaid00A636930CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Charles T Chen M.d. 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 Reassignments

3

Medicare enrollment records show Charles Chen reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Beaver Medical Group P C
0.7 mi
Family Medicine
2 WEST FERN AVENUE
Redlands, CA 92373
  • Reassigned Medicare billing, California enrollment
  • 635 clinicians in this Medicare group
NPI 1649503319 (909) 793-3311
Pinnacle Medical Group, Inc
15 mi
Family Medicine
8110 MANGO AVE
Fontana, CA 92335
  • Reassigned Medicare billing, California enrollment
  • 149 clinicians in this Medicare group
NPI 1376876912 (909) 427-1303
Healthcare Partners Affiliates Medical Group
43 mi
Addiction Medicine
14591 NEWPORT AVE
Tustin, CA 92780
  • Reassigned Medicare billing, California enrollment
  • 2,052 clinicians in this Medicare group
NPI 1891981502 (714) 442-4864

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 92373 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 3

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

EDWIN K LEE PA-C
Physician Assistant
236 CAJON ST
REDLANDS, CA 92373
San Bernardino County (909) 793-3311
DR. JOSEPH LEROY GEIERMAN JR. PHARMD APH
Pharmacist
236 CAJON ST
REDLANDS, CA 92373
San Bernardino County (909) 335-4182
MRS. KELLIE A ALLEN FNP
Nurse Practitioner (Family)
236 CAJON ST
REDLANDS, CA 92373
San Bernardino County (909) 793-3311

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 Charles Chen's NPI number?

The NPI number for Charles Chen is 1124050463. It was assigned to this individual provider in the NPPES registry on July 7, 2006.

Where is Charles Chen located?

Charles Chen practices at 236 Cajon St, Redlands, CA 92373. The listed phone number is (909) 793-3311.

What is Charles Chen's specialty?

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

Is Charles Chen enrolled in Medicare?

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

Which organizations bill Medicare for Charles Chen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Charles Chen reassigns Medicare benefits to 3 organizations: Beaver Medical Group P C (Redlands, CA), Pinnacle Medical Group, Inc (Fontana, CA) and Healthcare Partners Affiliates Medical Group (Tustin, 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 Charles 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 Charles Chen was last updated on January 18, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.