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DR. JAMES S CHANG M.D.
NPI 1417068073
Internal Medicine in San Francisco, CA

Active since August 31, 2006PECOS EnrolledAccepts Medicare Assignment
900 HYDE ST STE 410, SAN FRANCISCO, CA 94109(415) 353-6817(415) 353-6887 Get Directions Write a Review

NPPES record last updated: December 13, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. James S Chang M.d. NPPES

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

DR. JAMES S CHANG M.D. (NPI 1417068073) is an individual internal medicine provider in San Francisco, California, licensed in California (A86238) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and is a graduate of Icahn School Of Medicine At Mount Sinai (2002).

NPPES Registry Identity

NPI1417068073
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. JAMES S CHANGCredential: M.D.
Location Address900 HYDE ST STE 410San Francisco, CA 94109-4806
Mailing Address2100 N Point St, #105San Francisco, CA 94123-1478
Phone(415) 353-6817
Fax(415) 353-6887
Sole ProprietorNo
Medical School CMSIcahn School Of Medicine At Mount SinaiGraduated 2002
Enumeration DateAugust 31, 2006
Last NPPES UpdateDecember 13, 2021
✔ NPI 1417068073 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A86238
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.
900 HYDE ST STE 410, San Francisco, CA 94109
Open in Google Maps ↗

Other Identifiers 2

Medicaid00A862380CA
Other00A862380CA · Bcbs Of Ca

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. James 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 ID9739119520
PECOS Enrollment IDI20050822000654
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.

Medicare Billing Reassignment

Medicare enrollment records show James Chang reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Permanente Medical Group Inc
1.4 mi
Internal Medicine
2238 GEARY
San Francisco, CA 94116
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1841373800 (415) 833-2200

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94109 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.

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 James Chang's NPI number?

The NPI number for James Chang is 1417068073. It was assigned to this individual provider in the NPPES registry on August 31, 2006.

Where is James Chang located?

James Chang practices at 900 Hyde St Ste 410, San Francisco, CA 94109. The listed phone number is (415) 353-6817.

What is James Chang's specialty?

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

Is James Chang enrolled in Medicare?

Yes. James 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.

Which organization bills Medicare for James Chang's services?

According to the CMS Revalidation Reassignment List (October 2026 release), James Chang reassigns Medicare benefits to Permanente Medical Group Inc (San Francisco, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for James Chang's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for James Chang was last updated on December 13, 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.