DR. ALLAN CHANG MD
NPI 1134656267
Obstetrics & Gynecology in Mesquite, TX
About Dr. Allan Chang Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ALLAN CHANG MD (NPI 1134656267) is an individual obstetrics & gynecology provider in Mesquite, Texas, licensed in Texas (S9473) and active in the NPI registry since May 2017. He is enrolled in Medicare PECOS and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Allan Chang Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Allan Chang reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Mesquite, TX 75149
- Reassigned Medicare billing, Texas enrollment
- 3 clinicians in this Medicare group
Addison, TX 75001
- Reassigned Medicare billing, Texas enrollment
- Medicare enrollment name: Unified Womens Healthcare Of Texas PLLC
- 271 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 75149 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 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
MESQUITE, TX 75149
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 Allan Chang's NPI number?
The NPI number for Allan Chang is 1134656267. It was assigned to this individual provider in the NPPES registry on May 19, 2017.
Where is Allan Chang located?
Allan Chang practices at 1010 N Belt Line Rd Ste 101, Mesquite, TX 75149. The listed phone number is (469) 862-3756.
What is Allan Chang's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Allan Chang enrolled in Medicare?
Yes. Allan Chang is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Allan Chang's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Allan Chang reassigns Medicare benefits to 2 organizations: Holy Cross Obgyn (Mesquite, TX) and Unified Women's Healthcare Of Texas PLLC (Addison, TX). 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 Allan Chang's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Allan Chang accept?
Health plans from Ambetter Health, Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections and Ambetter from Superior HealthPlan and 6 other insurers list Allan Chang as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Allan Chang was last updated on October 24, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.