DR. ANGELA H. CHANG MD
NPI 1679776199
Family Medicine in Stillwater, OK
About Dr. Angela H. Chang Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ANGELA H. CHANG MD (NPI 1679776199) is an individual family medicine provider in Stillwater, Oklahoma, licensed in Oklahoma (27541) and active in the NPI registry since June 2007. She is enrolled in Medicare PECOS, is affiliated with Cayuga Medical Center At Ithaca, and is a graduate of Other (2010).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
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. Angela H. Chang Md 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.
Medicare Billing Reassignments
2Medicare enrollment records show Angela Chang reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Ithaca, NY 14850
- Reassigned Medicare billing, New York enrollment
- 328 clinicians in this Medicare group
Ithaca, NY 14850
- Reassigned Medicare billing, New York enrollment
- 59 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 3
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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Cayuga Medical Center At Ithaca
Acute Care Hospitals · Ithaca, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 74074 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
STILLWATER, OK 74074
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 Angela Chang's NPI number?
The NPI number for Angela Chang is 1679776199. It was assigned to this individual provider in the NPPES registry on June 11, 2007.
Where is Angela Chang located?
Angela Chang practices at 1815 W 6th Ave, Stillwater, OK 74074. The listed phone number is (405) 743-7300.
What is Angela Chang's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Angela Chang enrolled in Medicare?
Yes. Angela 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 organizations bill Medicare for Angela Chang's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Angela Chang reassigns Medicare benefits to 2 organizations: Cayuga Medical Associates, PC (Ithaca, NY) and Cma Medical Practice PLLC (Ithaca, NY). 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 Angela Chang's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Angela Chang affiliated with any hospitals?
According to CMS data, Angela Chang is affiliated with Cayuga Medical Center At Ithaca.
When was this NPI record last updated?
The NPPES record for Angela Chang was last updated on November 3, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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. Angela H. Chang, MD · NPI 1679776199
Family Medicine physician in Stillwater, Oklahoma. Individual provider, active in the CMS NPPES registry since June 11, 2007.
## Identity
- **NPI:** 1679776199 (Entity type: Individual)
- **Enumerated:** June 11, 2007
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** 27541 (Oklahoma)
- **Sole proprietor:** No
## Practice location
- **Address:** 1815 W 6TH AVE, Stillwater, OK 74074-4202
- **Phone:** (405) 743-7300
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **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): Cayuga Medical Associates, PC (NPI 1679525455, Ithaca, NY); Cma Medical Practice PLLC (NPI 1962985564, Ithaca, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2010
## Record status
- **NPPES last updated:** November 3, 2010
- **Other identifiers:** Medicaid 002428900 (FL); Medicare PIN DG663Z (FL)
---
Source: [NPI Profile](https://npiprofile.com/npi/1679776199) · Data from the CMS NPPES public registry.