1. Home
  2. Directory
  3. California
  4. Los Angeles
  5. Internal Medicine
  6. NPI Profile
Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DENNIS HAO CHEN MD
NPI 1639759970
Internal Medicine - Endocrinology, Diabetes & Metabolism in Los Angeles, CA

Active since April 12, 2021PECOS Enrolled
8723 ALDEN DR STE 290, LOS ANGELES, CA 90048(310) 423-3870 Get Directions Write a Review

NPPES record last updated: September 14, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 14, 2026, Jul 20, 2024, Apr 12, 2021 (3 updates tracked since 2021).

About Dennis Hao Chen Md NPPES

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

DENNIS HAO CHEN MD (NPI 1639759970) is an individual endocrinology, diabetes & metabolism provider in Los Angeles, California, licensed in California (A193287) and active in the NPI registry since April 2021. He is enrolled in Medicare PECOS and maintains a secondary practice location in West Hollywood.

NPPES Registry Identity

NPI1639759970
Entity TypeIndividualMale
Primary Taxonomy207RE0101X
Provider Legal NameDENNIS HAO CHENCredential: MD
Location Address8723 ALDEN DR STE 290Los Angeles, CA 90048-3692
Mailing Address4140 W 190th StTorrance, CA 90504-5513
Phone(310) 423-3870
Sole ProprietorNo
Enumeration DateApril 12, 2021
Last NPPES UpdateSeptember 14, 20263 updates tracked since enumeration
NPPES CertifiedSeptember 14, 2026
✔ NPI 1639759970 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians
Taxonomy Code207RE0101X
License✔ Licensed in CA · A193287
Definition
An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.
Also ListedInternal MedicineTaxonomy 207R00000X · License A193287 (CA)
8723 ALDEN DR STE 290, Los Angeles, CA 90048
Open in Google Maps ↗

Secondary Practice Location 1

Location 18700 Beverly BlvdWest Hollywood, CA 90048-1804 · Phone (310) 423-3870

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dennis Hao Chen Md 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 Dennis Chen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Cedars-Sinai Medical Center
0.2 mi
General Acute Care Hospital
8700 BEVERLY BLVD
Los Angeles, CA 90048
  • Reassigned Medicare billing, California enrollment
  • 1,001 clinicians in this Medicare group
NPI 1639172372 (323) 866-8600

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 90048 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 9

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

YELBA MARIAHELI CASTELLON-LOPEZ M.D.
Family Medicine
8723 ALDEN DR STE 290
LOS ANGELES, CA 90048
Los Angeles County (310) 423-4683
JAMES L. KIRKLAND M.D.
Internal Medicine (Endocrinology, Diabetes & Metabolism)
8723 ALDEN DR STE 290
LOS ANGELES, CA 90048
Los Angeles County (310) 423-3870
CEDARS-SINAI MEDICAL CENTER
Durable Medical Equipment & Medical Supplies
8723 ALDEN DR STE 290
LOS ANGELES, CA 90048
Los Angeles County (310) 423-3870
DR. CAROLYN BLYTHE DRAKE M.D.
Internal Medicine
8723 ALDEN DR STE 290
LOS ANGELES, CA 90048
Los Angeles County (310) 423-2811
PRISCILLA PHAN DO
Student in an Organized Health Care Education/Training Program
8723 ALDEN DR STE 290
LOS ANGELES, CA 90048
Los Angeles County (310) 385-3228
JACQUELINE MARIE DEIRMENJIAN MD
Student in an Organized Health Care Education/Training Program
8723 ALDEN DR STE 290
LOS ANGELES, CA 90048
Los Angeles County (310) 423-3870
MICHELLE KOH
Student in an Organized Health Care Education/Training Program
8723 ALDEN DR STE 290
LOS ANGELES, CA 90048
Los Angeles County (310) 423-3870
DANIEL MYUNG KIM MD
Internal Medicine
8723 ALDEN DR STE 290
LOS ANGELES, CA 90048
Los Angeles County (310) 423-2811

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 Dennis Chen's NPI number?

The NPI number for Dennis Chen is 1639759970. It was assigned to this individual provider in the NPPES registry on April 12, 2021.

Where is Dennis Chen located?

Dennis Chen practices at 8723 Alden Dr Ste 290, Los Angeles, CA 90048. The listed phone number is (310) 423-3870.

What is Dennis Chen's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Is Dennis Chen enrolled in Medicare?

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

Which organization bills Medicare for Dennis Chen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Dennis Chen reassigns Medicare benefits to Cedars-Sinai Medical Center (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 Dennis 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 Dennis 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 44 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.