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DR. DIANE LYNN CHAU MD
NPI 1780609834
Internal Medicine in Long Beach, CA

Active since July 12, 2006PECOS Enrolled
200 OCEANGATE STE 100, LONG BEACH, CA 90802(888) 562-5442 Get Directions Write a Review

NPPES record last updated: August 24, 2023. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Dr. Diane Lynn Chau Md NPPES

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

DR. DIANE LYNN CHAU MD (NPI 1780609834) is an individual internal medicine provider in Long Beach, California, licensed in California (A65089) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS and maintains a secondary practice location in La Jolla.

NPPES Registry Identity

NPI1780609834
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameDR. DIANE LYNN CHAUCredential: MD
Location Address200 OCEANGATE STE 100Long Beach, CA 90802-4317
Mailing Address200 Oceangate Ste 100Long Beach, CA 90802-4317 · (888) 562-5442
Phone(888) 562-5442
Sole ProprietorNo
Enumeration DateJuly 12, 2006
Last NPPES UpdateAugust 24, 2023
NPPES CertifiedAugust 24, 2023
✔ NPI 1780609834 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Licenses✔ Licensed in CA · A65089✔ Licensed in HI · 9807
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.
200 OCEANGATE STE 100, Long Beach, CA 90802
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Secondary Practice Location 1

Location 110666 N Torrey Pines RdLA Jolla, CA 92037-1027 · Phone (858) 554-6158

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Diane Lynn Chau 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90802 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 20

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

MOLINA MEDICAL GROUP OF NEW MEXICO, PC
Family Medicine
200 OCEANGATE STE 100
LONG BEACH, CA 90802
Los Angeles County (562) 499-6191
DARLENA THACH FNP-C
Nurse Practitioner (Family)
200 OCEANGATE STE 100
LONG BEACH, CA 90802
Los Angeles County (888) 562-5442
JOANNA DURON FNP
Nurse Practitioner (Family)
200 OCEANGATE STE 100
LONG BEACH, CA 90802
Los Angeles County (760) 718-5648
JENNIFER M DONALDSON
Nurse Practitioner (Family)
200 OCEANGATE STE 100
LONG BEACH, CA 90802
Los Angeles County (888) 562-5442
MELISSA STEWART LCSW
Social Worker (Clinical)
200 OCEANGATE STE 100
LONG BEACH, CA 90802
Los Angeles County (860) 255-4640
DAISY O ALVARADO FNP-C, RN, PHN, CBN
Nurse Practitioner (Family)
200 OCEANGATE STE 100
LONG BEACH, CA 90802
Los Angeles County (951) 660-6224
MRS. CHARLYNE GABRIEL-JACQUES ARNP
Nurse Practitioner (Psychiatric/Mental Health)
200 OCEANGATE STE 100
LONG BEACH, CA 90802
Los Angeles County (305) 382-4161
ALYSSA AREEPRACHAPIROM
Nurse Practitioner (Psychiatric/Mental Health)
200 OCEANGATE STE 100
LONG BEACH, CA 90802
Los Angeles County (888) 562-5442

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 Diane Chau's NPI number?

The NPI number for Diane Chau is 1780609834. It was assigned to this individual provider in the NPPES registry on July 12, 2006.

Where is Diane Chau located?

Diane Chau practices at 200 Oceangate Ste 100, Long Beach, CA 90802. The listed phone number is (888) 562-5442.

What is Diane Chau's specialty?

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

Is Diane Chau enrolled in Medicare?

Yes. Diane Chau is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Diane Chau was last updated on August 24, 2023. 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.