1. Home
  2. Directory
  3. California
  4. Los Angeles
  5. Dermatology
  6. NPI Profile

DR. HSI YEN MD, MPH
NPI 1982345369
Dermatology in Los Angeles, CA

Active since April 07, 2022PECOS Enrolled
4650 W SUNSET BLVD # 144, LOS ANGELES, CA 90027(323) 361-4191 Get Directions Write a Review

NPPES record last updated: April 30, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Apr 30, 2026, Mar 4, 2026, Apr 18, 2024 and 1 more (4 updates tracked since 2022).

About Dr. Hsi Yen Md, Mph NPPES

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

DR. HSI YEN MD, MPH (NPI 1982345369) is an individual dermatology provider in Los Angeles, California, licensed in California (A207683) and active in the NPI registry since April 2022. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1982345369
Entity TypeIndividualMale
Primary Taxonomy207N00000X
Provider Legal NameDR. HSI YENCredential: MD, MPH
Location Address4650 W SUNSET BLVD # 144Los Angeles, CA 90027-6062
Mailing Address4650 W Sunset Blvd # 144Los Angeles, CA 90027-6062
Phone(323) 361-4191
Sole ProprietorNo
Enumeration DateApril 7, 2022
Last NPPES UpdateApril 30, 20264 updates tracked since enumeration
NPPES CertifiedApril 30, 2026
✔ NPI 1982345369 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDermatologyAllopathic & Osteopathic Physicians
Taxonomy Code207N00000X
License✔ Licensed in CA · A207683
Definition
A dermatologist is trained to diagnose and treat pediatric and adult patients with benign and malignant disorders of the skin, mouth, external genitalia, hair and nails, as well as a number of sexually transmitted diseases. The dermatologist has had additional training and experience in the diagnosis and treatment of skin cancers, melanomas, moles and other tumors of the skin, the management of contact dermatitis and other allergic and nonallergic skin disorders, and in the recognition of the skin manifestations of systemic (including internal malignancy) and infectious diseases. Dermatologists have special training in dermatopathology and in the surgical techniques used in dermatology. They also have expertise in the management of cosmetic disorders of the skin such as hair loss and scars and the skin changes associated with aging.
4650 W SUNSET BLVD # 144, Los Angeles, CA 90027
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 (PECOS)

Dr. Hsi Yen Md, Mph 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 Hsi Yen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Children's Hospital Los Angeles Medical Group, Inc.
Same address
Multi-Specialty
4650 SUNSET BLVD
Los Angeles, CA 90027
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: Childrens Hospital Los Angeles Medical Group Inc
  • 1,281 clinicians in this Medicare group
NPI 1265530653 (323) 361-2337

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 90027 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
$77.96 typical visit price
range $20.84 – $153.61
Typical copayment $19.49 (range $5.21 – $38.40)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Hsi Yen's NPI number?

The NPI number for Hsi Yen is 1982345369. It was assigned to this individual provider in the NPPES registry on April 7, 2022.

Where is Hsi Yen located?

Hsi Yen practices at 4650 W Sunset Blvd # 144, Los Angeles, CA 90027. The listed phone number is (323) 361-4191.

What is Hsi Yen's specialty?

The primary specialty registered for this NPI is Dermatology with taxonomy code 207N00000X.

Is Hsi Yen enrolled in Medicare?

Yes. Hsi Yen is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Hsi Yen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Hsi Yen reassigns Medicare benefits to Children's Hospital Los Angeles Medical Group, Inc. (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 Hsi Yen'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 Hsi Yen was last updated on April 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.