Xiaoying Chang, MD
NPI 1336261908 · Psychiatry Physician · San Antonio, TX
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Xiaoying Chang, MD is a Psychiatry Physician provider in San Antonio, TX (NPI 1336261908).
Provider details
- NPI number
- 1336261908
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- TX BP10022345 (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 · 17 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Clozapine | 65 |
| Aripiprazole | 30 |
| Olanzapine | 28 |
| Lithium Carbonatebrand: Lithium Carbonate Er | 24 |
| Lorazepam | 24 |
| Sertraline Hcl | 24 |
| Divalproex Sodiumbrand: Divalproex Sodium Er | 23 |
| Quetiapine Fumarate | 23 |
| Clonazepam | 22 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-04-04
- Last updated
- 2007-07-11
Frequently asked questions
- What is Xiaoying Chang's NPI number?
- Xiaoying Chang's National Provider Identifier (NPI) is 1336261908, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Xiaoying Chang's specialty?
- Xiaoying Chang is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Xiaoying Chang located?
- Xiaoying Chang's practice location on file with NPPES is 7703 Floyd Curl Dr, San Antonio, TX 78229-3901.
- What is Xiaoying Chang's phone number?
- The practice phone number listed in the NPPES registry for Xiaoying Chang is (210) 567-5430.
- Does Xiaoying Chang accept Medicare?
- Xiaoying Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Xiaoying Chang's NPI active?
- Yes — Xiaoying Chang's NPI (1336261908) is active in the NPPES registry as of the last update on 2007-07-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.