Marlene Chang-Brown, MD
NPI 1659471696 · Internal Medicine Physician · Mcallen, TX
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marlene Chang-Brown, MD is a Internal Medicine Physician provider in Mcallen, TX (NPI 1659471696).
Provider details
- NPI number
- 1659471696
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- J9998 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 118 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 1,585 | 527 |
| Lisinopril | 706 | 237 |
| Amlodipine Besylate | 643 | 236 |
| Metformin Hcl | 638 | 223 |
| Losartan Potassium | 635 | 212 |
| Rosuvastatin Calcium | 528 | 183 |
| Simvastatin | 458 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-22
- Last updated
- 2023-05-22
- Certified
- 2023-05-22
Frequently asked questions
- What is Marlene Chang-Brown's NPI number?
- Marlene Chang-Brown's National Provider Identifier (NPI) is 1659471696, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marlene Chang-Brown's specialty?
- Marlene Chang-Brown is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Marlene Chang-Brown located?
- Marlene Chang-Brown's practice location on file with NPPES is 1417 N Ware Rd Ste 300, Mcallen, TX 78501-8587.
- What is Marlene Chang-Brown's phone number?
- The practice phone number listed in the NPPES registry for Marlene Chang-Brown is (956) 585-4704.
- Does Marlene Chang-Brown accept Medicare?
- Marlene Chang-Brown is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marlene Chang-Brown's NPI active?
- Yes — Marlene Chang-Brown's NPI (1659471696) is active in the NPPES registry as of the last update on 2023-05-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.