DR. MARLENE C CHANG-BROWN MD
NPI 1659471696
Internal Medicine in Mcallen, TX
About Dr. Marlene C Chang-brown Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARLENE C CHANG-BROWN MD (NPI 1659471696) is an individual internal medicine provider in Mcallen, Texas, licensed in Texas (J9998) and active in the NPI registry since September 2006. She is enrolled in Medicare PECOS and is a graduate of Other (1987).
NPPES Registry Identity
Specialties & Licenses
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. Marlene C Chang-brown 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 Reassignment
Medicare enrollment records show Marlene Chang-brown reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Mission, TX 78572
- Reassigned Medicare billing, Texas enrollment
- Medicare enrollment name: Wellmed Medical Group PA
- 762 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 78501 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 7
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
MCALLEN, TX 78501
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 Marlene Chang-brown's NPI number?
The NPI number for Marlene Chang-brown is 1659471696. It was assigned to this individual provider in the NPPES registry on September 22, 2006.
Where is Marlene Chang-brown located?
Marlene Chang-brown practices at 1417 N Ware Rd Ste 300, Mcallen, TX 78501. The listed phone number is (956) 585-4704.
What is Marlene Chang-brown's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Marlene Chang-brown enrolled in Medicare?
Yes. Marlene Chang-brown 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 Marlene Chang-brown's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marlene Chang-brown reassigns Medicare benefits to Wellmed Medical Group, P.A. (Mission, TX). 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 Marlene Chang-brown'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 Marlene Chang-brown was last updated on May 22, 2023. 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.
# Dr. Marlene C Chang-Brown, MD · NPI 1659471696
Internal Medicine physician in Mcallen, Texas. Individual provider, active in the CMS NPPES registry since September 22, 2006.
## Identity
- **NPI:** 1659471696 (Entity type: Individual)
- **Enumerated:** September 22, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** J9998 (Texas)
- **Sole proprietor:** No
## Practice location
- **Address:** 1417 N WARE RD STE 300, Mcallen, TX 78501-8587
- **Phone:** (956) 585-4704 · **Fax:** (956) 585-6775
## 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:** Wellmed Medical Group, P.A. (NPI 1194023697, Mission, TX), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1987
## Record status
- **NPPES last updated:** May 22, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1659471696) · Data from the CMS NPPES public registry.