William J Chang, MD in Redwood City, CA

William J Chang, MD is a medicare enrolled "Ophthalmology" physician in Redwood City, California. His current practice location is 1150 Veterans Blvd, Redwood City, California. You can reach out to his office (for appointments etc.) via phone at (650) 299-2000.

William J Chang is licensed to practice in California (license number G50770) and he also participates in the medicare program. He does not accept medicare assignments directly but he may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. His NPI Number is 1487732020.

Contact Information

	William J Chang, MD
	1150 Veterans Blvd, Redwood City, CA 94063-2037
	(650) 299-2000
	Not Available

Map and Direction

Physician's Profile

Full Name	William J Chang
Gender	Male
Speciality	Ophthalmology
Location	1150 Veterans Blvd, Redwood City, California
Accepts Medicare Assignments	Medicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.

NPI Data:

NPI Number: 1487732020
Provider Enumeration Date: 11/01/2006
Last Update Date: 07/08/2007

Medicare PECOS Information:

PECOS PAC ID: 4880882711
Enrollment ID: I20101220000727

Medical Identifiers

Medical identifiers for William J Chang such as npi, medicare ID, medicare PIN, medicaid, etc.

Identifier	Type	State	Issuer
1487732020	NPI	-	NPPES
00G507700	Medicaid	CA

Medical Taxonomies and Licenses

Taxonomy	Type	License (State)	Status
207W00000X	Ophthalmology	G50770 (California)	Primary

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. William J Chang allows following entities to bill medicare on his behalf.

Entity Name	Permanente Medical Group Inc
Entity Type	Part B Supplier - Clinic/group Practice
Entity Identifiers	NPI Number: 1073606299 PECOS PAC ID: 8921910225 Enrollment ID: O20031104000710

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. William J Chang is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing Address	Practice Location Address
William J Chang, MD 1800 Harrison St Fl 7, Oakland, CA 94612-3429 Ph: (510) 625-6262	William J Chang, MD 1150 Veterans Blvd, Redwood City, CA 94063-2037 Ph: (650) 299-2000

Reviews and Comments

Ophthalmology Doctors in Redwood City, CA

Ronald B. Melles, MD Ophthalmology Medicare: Accepting Medicare Assignments Practice Location: 1150 Veterans Blvd, Redwood City, CA 94063 Phone: 650-299-2000
Paul C. Chen, MD Ophthalmology Medicare: Accepting Medicare Assignments Practice Location: 1150 Veterans Blvd, Redwood City, CA 94063 Phone: 650-299-2000
Douglas S. Holsclaw, MD Ophthalmology Medicare: Medicare Enrolled Practice Location: 1150 Veterans Blvd, Redwood City, CA 94063 Phone: 650-299-2000
Henry Y Upton, M.D. Ophthalmology Medicare: Not Enrolled in Medicare Practice Location: 805 Veterans Blvd, Suite 125, Redwood City, CA 94063 Phone: 650-368-3937 Fax: 650-368-0270
Dr. Theresa Thu Thao Nguyen, D.O. Ophthalmology Medicare: Medicare Enrolled Practice Location: 905 Maple St, Redwood City, CA 94063 Phone: 650-299-2066
James E. Tearse, MD Ophthalmology Medicare: Accepting Medicare Assignments Practice Location: 1391 Woodside Rd., Suite 200, Redwood City, CA 94061 Phone: 650-368-3937 Fax: 650-368-0270

William J Chang, MD - Medicare Ophthalmology in Redwood City, CA