ANNE LIAO MD
NPI 1164099487
Obstetrics & Gynecology in Diamond Bar, CA

Active since June 06, 2021PECOS EnrolledAccepts Medicare Assignment
253 S DIAMOND BAR BLVD, DIAMOND BAR, CA 91765(909) 860-1144 Get Directions Write a Review

NPPES record last updated: September 2, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Sep 2, 2025, Jun 6, 2021 (2 updates tracked since 2021).

About Anne Liao Md NPPES

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

ANNE LIAO MD (NPI 1164099487) is an individual obstetrics & gynecology provider in Diamond Bar, California, licensed in California (A193649) and active in the NPI registry since June 2021. She is enrolled in Medicare PECOS, maintains a secondary practice location in Los Angeles, and is a graduate of Other (2021).

NPPES Registry Identity

NPI1164099487
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameANNE LIAOCredential: MD
Location Address253 S DIAMOND BAR BLVDDiamond Bar, CA 91765-1606
Mailing Address1720 E Cesar E Chavez AveLos Angeles, CA 90033-2414 · (323) 260-5781
Sole ProprietorNo
Medical School CMSOtherGraduated 2021
Enumeration DateJune 6, 2021
Last NPPES UpdateSeptember 2, 20252 updates tracked since enumeration
NPPES CertifiedSeptember 2, 2025
NPI 1164099487 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License Licensed in CA · A193649
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
253 S DIAMOND BAR BLVD, Diamond Bar, CA 91765

Secondary Practice Location 1

Location 11720 E Cesar E Chavez AveLos Angeles, CA 90033-2414 · Phone (323) 260-5781

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Anne Liao 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 ID3577067305
PECOS Enrollment IDI20250916002440
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 91765 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
$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 8

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

Social Worker (Clinical)
253 S DIAMOND BAR BLVD
DIAMOND BAR, CA 91765
Family Medicine
253 S DIAMOND BAR BLVD
DIAMOND BAR, CA 91765
Family Medicine
253 S DIAMOND BAR BLVD
DIAMOND BAR, CA 91765
Registered Nurse
253 S DIAMOND BAR BLVD
DIAMOND BAR, CA 91765
Obstetrics & Gynecology
253 S DIAMOND BAR BLVD
DIAMOND BAR, CA 91765
Family Medicine
253 S DIAMOND BAR BLVD
DIAMOND BAR, CA 91765
Social Worker (Clinical)
253 S DIAMOND BAR BLVD
DIAMOND BAR, CA 91765
Nurse Practitioner (Women's Health)
253 S DIAMOND BAR BLVD
DIAMOND BAR, CA 91765

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 Anne Liao's NPI number?

The NPI number for Anne Liao is 1164099487. It was assigned to this individual provider in the NPPES registry on June 6, 2021.

Where is Anne Liao located?

Anne Liao practices at 253 S Diamond Bar Blvd, Diamond Bar, CA 91765. The listed phone number is (909) 860-1144.

What is Anne Liao's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Anne Liao enrolled in Medicare?

Yes. Anne Liao 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.

When was this NPI record last updated?

The NPPES record for Anne Liao was last updated on September 2, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.