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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. WINSTON Y CHANG DO
NPI 1952981730
Internal Medicine - Endocrinology, Diabetes & Metabolism in Woodland, CA

Active since April 14, 2021PECOS Enrolled
632 W GIBSON RD, WOODLAND, CA 95695(530) 668-2600(530) 661-1054 Get Directions Write a Review

NPPES record last updated: September 28, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Sep 28, 2026, Aug 21, 2024, Dec 10, 2021 and 1 more (4 updates tracked since 2021).

About Dr. Winston Y Chang Do NPPES

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

DR. WINSTON Y CHANG DO (NPI 1952981730) is an individual endocrinology, diabetes & metabolism provider in Woodland, California, licensed in California (20A20940) and active in the NPI registry since April 2021. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1952981730
Entity TypeIndividualMale
Primary Taxonomy207RE0101X
Provider Legal NameDR. WINSTON Y CHANGCredential: DO
Location Address632 W GIBSON RDWoodland, CA 95695-5169
Mailing Address3400 Data Dr, Attention: Credentialing/payer Enrollment DepartmentRancho Cordova, CA 95670
Phone(530) 668-2600
Fax(530) 661-1054
Sole ProprietorNo
Enumeration DateApril 14, 2021
Last NPPES UpdateSeptember 28, 20264 updates tracked since enumeration
NPPES CertifiedSeptember 28, 2026
✔ NPI 1952981730 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians
Taxonomy Code207RE0101X
License✔ Licensed in CA · 20A20940
Definition
An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.
632 W GIBSON RD, Woodland, CA 95695
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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. Winston Y Chang Do 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 95695 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
$137.20 typical visit price
range $60.44 – $180.85
Typical copayment $34.30 (range $15.11 – $45.21)
Most-billed visit code 99204
Established Patient
$105.95 typical visit price
range $19.88 – $148.15
Typical copayment $26.48 (range $4.97 – $37.03)
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.

NEEHARIKA THOTTEMPUDI MBBS
Psychiatry & Neurology (Neurology)
632 W GIBSON RD
WOODLAND, CA 95695
Yolo County (530) 668-2600
SABA SAJID
Family Medicine
632 W GIBSON RD
WOODLAND, CA 95695
Yolo County (530) 668-2600
DR. GEORGE T WONG JR. MD
Obstetrics & Gynecology
632 W GIBSON RD
WOODLAND, CA 95695
Yolo County (530) 666-1631
CARLOS E RODRIGUEZ CASTRO MD
Hospitalist
632 W GIBSON RD
WOODLAND, CA 95695
Yolo County (530) 668-2600
OFILI OKOLONWAMU N.P., PA-C
Physician Assistant
632 W GIBSON RD
WOODLAND, CA 95695
Yolo County (530) 668-2600
LORETTA R WINN PA-C
Physician Assistant
632 W GIBSON RD
WOODLAND, CA 95695
Yolo County (530) 668-2600
MAN LUNG WU AGPCNP-BC
Nurse Practitioner
632 W GIBSON RD
WOODLAND, CA 95695
Yolo County (530) 668-2652
DIGNITY HEALTH
Pharmacy (Community/Retail Pharmacy)
632 W GIBSON RD
WOODLAND, CA 95695
Yolo County (530) 668-2646

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 Winston Chang's NPI number?

The NPI number for Winston Chang is 1952981730. It was assigned to this individual provider in the NPPES registry on April 14, 2021.

Where is Winston Chang located?

Winston Chang practices at 632 W Gibson Rd, Woodland, CA 95695. The listed phone number is (530) 668-2600.

What is Winston Chang's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Is Winston Chang enrolled in Medicare?

Yes. Winston Chang is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Winston Chang was last updated on September 28, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 25 days 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.