1. Home
  2. Directory
  3. California
  4. Oakland
  5. Internal Medicine
  6. NPI Profile

JOY CHANG LIU
NPI 1669008629
Internal Medicine in Oakland, CA

Active since March 20, 2020PECOS EnrolledAccepts Medicare Assignment
1411 E 31ST ST, OAKLAND, CA 94602(507) 437-4564 Get Directions Write a Review

NPPES record last updated: August 1, 2025. Verified against the NPPES registry weekly; last sync: August 23, 2026.

Record update history: Jul 7, 2024, Mar 20, 2020 (2 updates tracked since 2020).

About Joy Chang Liu NPPES

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

JOY CHANG LIU (NPI 1669008629) is an individual internal medicine provider in Oakland, California, licensed in California (A180577) and active in the NPI registry since March 2020. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Mayo Medical School (2020).

NPPES Registry Identity

NPI1669008629
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameJOY CHANG LIU
Location Address1411 E 31ST STOakland, CA 94602-1018
Mailing Address1411 E 31st StOakland, CA 94602-1018 · (507) 437-4564
Phone(507) 437-4564
Sole ProprietorNo
Medical School CMSMayo Medical SchoolGraduated 2020
Enumeration DateMarch 20, 2020
Last NPPES UpdateAugust 1, 20252 updates tracked since enumeration
NPPES CertifiedAugust 1, 2025
✔ NPI 1669008629 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A180577
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.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
1411 E 31ST ST, Oakland, CA 94602
Open in Google Maps ↗

Secondary Practice Locations 2

Location 11 Gustave L Levy Pl # 1070New York, NY 10029-6504 · Phone (212) 241-6500
Location 2275 W MacArthur BlvdOakland, CA 94611-5641 · Phone (510) 752-1000

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

Joy Chang Liu 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 ID4981062809
PECOS Enrollment IDI20230623002419
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 94602 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
$153.83 typical visit price
range $69.00 – $202.35
Typical copayment $38.45 (range $17.25 – $50.58)
Most-billed visit code 99204
Established Patient
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
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.

MS. YVONNE DIANE ESCARSEGA MSW
Social Worker (Clinical)
1411 E 31ST ST
OAKLAND, CA 94602
Alameda County (510) 437-4373
MR. JUAN CASILLAS JR. NP
Nurse Practitioner (Family)
1411 E 31ST ST
OAKLAND, CA 94602
Alameda County (510) 437-4800
SADHANA SAMANT MD
Obstetrics & Gynecology
1411 E 31ST ST, OAKCARE MEDICAL GROUP
OAKLAND, CA 94602
Alameda County (510) 437-4323
PATRICIA SCOTT MEYER PA
Clinical Nurse Specialist (Emergency)
1411 E 31ST ST
OAKLAND, CA 94602
Alameda County (209) 342-2300
NATHALIE BALOGUN MSW MPH
Social Worker (Clinical)
1411 E 31ST ST, ALAMEDA COUNTY MEDICAL CENTER - MEDICAL SOCAL WORK SRVC
OAKLAND, CA 94602
Alameda County (510) 437-4949
CYNTHIA MARIE ROWDEN RN
Registered Nurse (Ambulatory Care)
1411 E 31ST ST
OAKLAND, CA 94602
Alameda County (510) 437-4373
DR. KAYLA ENRIQUEZ MD
Emergency Medicine
1411 E 31ST ST
OAKLAND, CA 94602
Alameda County (510) 437-4564
DR. CHERYL LIN PARK M.D.
Surgery
1411 E 31ST ST
OAKLAND, CA 94602
Alameda County (510) 437-4743

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 Joy Liu's NPI number?

The NPI number for Joy Liu is 1669008629. It was assigned to this individual provider in the NPPES registry on March 20, 2020.

Where is Joy Liu located?

Joy Liu practices at 1411 E 31st St, Oakland, CA 94602. The listed phone number is (507) 437-4564.

What is Joy Liu's specialty?

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

Is Joy Liu enrolled in Medicare?

Yes. Joy Liu 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 Joy Liu was last updated on August 1, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.