DR. AMY CHANG M.D.
NPI 1033320023
Internal Medicine in West Chester, PA
About Dr. Amy Chang M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. AMY CHANG M.D. (NPI 1033320023) is an individual internal medicine provider in West Chester, Pennsylvania, licensed in Pennsylvania (MD437050) and active in the NPI registry since May 2007. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Amy Chang M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Amy Chang reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
West Chester, PA 19380
- Reassigned Medicare billing, Pennsylvania enrollment
- 983 clinicians in this Medicare group
Philadelphia, PA 19143
- Reassigned Medicare billing, Pennsylvania enrollment
- Also billed through NPI 1194832899 (Pennsylvania)
- 752 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 19380 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 13
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WEST CHESTER, PA 19380
WEST CHESTER, PA 19380
WEST CHESTER, PA 19380
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 Amy Chang's NPI number?
The NPI number for Amy Chang is 1033320023. It was assigned to this individual provider in the NPPES registry on May 24, 2007.
Where is Amy Chang located?
Amy Chang practices at 520 Maple Ave Ste 3, West Chester, PA 19380. The listed phone number is (484) 364-2824.
What is Amy Chang's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Amy Chang enrolled in Medicare?
Yes. Amy Chang is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Amy Chang's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Amy Chang reassigns Medicare benefits to 2 organizations: Clinical Care Associates Of The University Of Pennsylvania Health (West Chester, PA) and University Of Penn-Medical Group (Philadelphia, PA). Each 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 Amy 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 Amy Chang was last updated on March 23, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# Dr. Amy Chang, M.D. · NPI 1033320023
Internal Medicine physician in West Chester, Pennsylvania. Individual provider, active in the CMS NPPES registry since May 24, 2007.
## Identity
- **NPI:** 1033320023 (Entity type: Individual)
- **Enumerated:** May 24, 2007
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** MD437050 (Pennsylvania)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 520 MAPLE AVE, STE 3, West Chester, PA 19380-4434
- **Phone:** (484) 364-2824 · **Fax:** (610) 350-3099
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Clinical Care Associates Of The University Of Pennsylvania Health (NPI 1396416251, West Chester, PA); University Of Penn-Medical Group (NPI 1992301196, Philadelphia, PA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** March 23, 2017
- **Other identifiers:** Medicare PIN 159353ZEBS (PA)
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Source: [NPI Profile](https://npiprofile.com/npi/1033320023) · Data from the CMS NPPES public registry.