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DR. MATTHEW S. CHANG M.D.
NPI 1598949521
Internal Medicine - Gastroenterology in Palo Alto, CA

Active since December 27, 2007PECOS EnrolledAccepts Medicare Assignment
900 BLAKE WILBUR DR, PALO ALTO, CA 94304(650) 736-5555 Get Directions Write a Review

NPPES record last updated: December 17, 2021. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Dec 17, 2021, May 22, 2017 (2 updates tracked since 2017).

About Dr. Matthew S. Chang M.d. NPPES

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

DR. MATTHEW S. CHANG M.D. (NPI 1598949521) is an individual gastroenterology provider in Palo Alto, California, licensed in California (A133674) and active in the NPI registry since December 2007. He is enrolled in Medicare PECOS and is a graduate of University Of Michigan Medical School (2006).

NPPES Registry Identity

NPI1598949521
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameDR. MATTHEW S. CHANGCredential: M.D.
Location Address900 BLAKE WILBUR DRPalo Alto, CA 94304-2201
Mailing Address900 Blake Wilbur DrPalo Alto, CA 94304-2201
Phone(650) 736-5555
Sole ProprietorNo
Medical School CMSUniversity Of Michigan Medical SchoolGraduated 2006
Enumeration DateDecember 27, 2007
Last NPPES UpdateDecember 17, 20212 updates tracked since enumeration
✔ NPI 1598949521 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in CA · A133674
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
Also ListedInternal MedicineTaxonomy 207R00000X · License 250090 (MA), 245746 (NY)
900 BLAKE WILBUR DR, Palo Alto, CA 94304
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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 and accepts Medicare assignment

Dr. Matthew S. Chang M.d. 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 ID5597816108
PECOS Enrollment IDI20150731016848
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 94304 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
$156.67 typical visit price
range $70.37 – $206.04
Typical copayment $39.16 (range $17.59 – $51.51)
Most-billed visit code 99204
Established Patient
$121.77 typical visit price
range $23.96 – $169.60
Typical copayment $30.44 (range $5.99 – $42.40)
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.

MS. MARIANNE S OUTZEN OTR
Occupational Therapist (Hand)
900 BLAKE WILBUR DR, SUITE W1080
PALO ALTO, CA 94304
Santa Clara County (650) 723-1702
TATIANA NORMAN-BRIVET NP
Nurse Practitioner (Family)
900 BLAKE WILBUR DR, 1ST FLOOR
PALO ALTO, CA 94304
Santa Clara County (650) 498-6004
NATALIE HOWLETT
Internal Medicine
900 BLAKE WILBUR DR
PALO ALTO, CA 94304
Santa Clara County (650) 723-6961
AISHA FURQAN MS, CGC
Genetic Counselor, MS
900 BLAKE WILBUR DR
PALO ALTO, CA 94304
Santa Clara County (650) 304-6970
DR. DANIEL NAVI M.D.
Dermatology
900 BLAKE WILBUR DR
PALO ALTO, CA 94304
Santa Clara County (650) 736-2300
DR. STEVEN BINDER O.D.
Optometrist
900 BLAKE WILBUR DR, 3RD FLOOR
PALO ALTO, CA 94304
Santa Clara County (650) 723-6995
ROSANNA DUESTER PA-C
Physician Assistant
900 BLAKE WILBUR DR
PALO ALTO, CA 94304
Santa Clara County (650) 736-9578
DR. DEEPTI DIVYA GOPISETTY MD
Student in an Organized Health Care Education/Training Program
900 BLAKE WILBUR DR
PALO ALTO, CA 94304
Santa Clara County (650) 725-6079

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 Matthew Chang's NPI number?

The NPI number for Matthew Chang is 1598949521. It was assigned to this individual provider in the NPPES registry on December 27, 2007.

Where is Matthew Chang located?

Matthew Chang practices at 900 Blake Wilbur Dr, Palo Alto, CA 94304. The listed phone number is (650) 736-5555.

What is Matthew Chang's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Matthew Chang enrolled in Medicare?

Yes. Matthew Chang 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 Matthew Chang was last updated on December 17, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.