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THINH CHAU MD
NPI 1811448251
Dermatology in Los Alamitos, CA

Active since October 20, 2016PECOS EnrolledAccepts Medicare Assignment
4281 KATELLA AVE STE 220, LOS ALAMITOS, CA 90720(562) 252-0173(949) 783-2845 Get Directions Write a Review

NPPES record last updated: August 27, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Aug 25, 2023, Jun 29, 2020, May 12, 2020 and 1 more (4 updates tracked since 2016).

About Thinh Chau Md NPPES

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

THINH CHAU MD (NPI 1811448251) is an individual dermatology provider in Los Alamitos, California, licensed in California (A187393) and active in the NPI registry since October 2016. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of University Of California, Davis School Of Medicine (2019).

NPPES Registry Identity

NPI1811448251
Entity TypeIndividualMale
Primary Taxonomy207N00000X
Provider Legal NameTHINH CHAUCredential: MD
Location Address4281 KATELLA AVE STE 220Los Alamitos, CA 90720-6506
Mailing Address7601 Stoneridge DrPleasanton, CA 94588-4501 · (925) 847-5090
Phone(562) 252-0173
Fax(949) 783-2845
Sole ProprietorYes
Medical School CMSUniversity Of California, Davis School Of MedicineGraduated 2019
Enumeration DateOctober 20, 2016
Last NPPES UpdateAugust 27, 20244 updates tracked since enumeration
NPPES CertifiedAugust 27, 2024
✔ NPI 1811448251 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDermatologyAllopathic & Osteopathic Physicians
Taxonomy Code207N00000X
Licenses✔ Licensed in CA · A187393✔ Licensed in CA · 187393✔ Licensed in RI · LP04899
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.
4281 KATELLA AVE STE 220, Los Alamitos, CA 90720
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Secondary Practice Locations 2

Location 1593 Eddy StProvidence, RI 02903-4923 · Phone (401) 444-7959
Location 27601 Stoneridge DrPleasanton, CA 94588-4501 · Phone (925) 847-5090

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include UnitedHealthcare.Insurance ›

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

Thinh Chau Md 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 ID3678998150
PECOS Enrollment IDI20230918002989
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 Thinh Chau reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

J Robert West, M.D., Inc
17 mi
Dermatology
400 NEWPORT CENTER DR STE 702
Newport Beach, CA 92660
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: J Robert West MD Inc
  • 121 clinicians in this Medicare group
NPI 1932154788 (949) 644-0101
Permanente Medical Group Inc
329 mi
Internal Medicine
710 LAWRENCE EXPRESSWAY
Santa Clara, CA 95051
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1073606299 (408) 851-1000

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 90720 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.

Other Providers at the Same Location NPPES

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

HEATHER TAMARA PATZ PA-C
Physician Assistant
4281 KATELLA AVE STE 220
LOS ALAMITOS, CA 90720
Orange County (562) 252-0173

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 Thinh Chau's NPI number?

The NPI number for Thinh Chau is 1811448251. It was assigned to this individual provider in the NPPES registry on October 20, 2016.

Where is Thinh Chau located?

Thinh Chau practices at 4281 Katella Ave Ste 220, Los Alamitos, CA 90720. The listed phone number is (562) 252-0173.

What is Thinh Chau's specialty?

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

Is Thinh Chau enrolled in Medicare?

Yes. Thinh Chau 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 Thinh Chau's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Thinh Chau reassigns Medicare benefits to 2 organizations: J Robert West, M.D., Inc (Newport Beach, CA) and Permanente Medical Group Inc (Santa Clara, 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 Thinh Chau's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Thinh Chau accept?

Health plans from UnitedHealthcare list Thinh Chau as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Thinh Chau was last updated on August 27, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years 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.