Allison Chang, MD
NPI 1114662574 · Psychiatry Physician · Palo Alto, CA
Allison Chang, MD is a Psychiatry Physician provider in Palo Alto, CA (NPI 1114662574).
Provider details
- NPI number
- 1114662574
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A201276 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
4 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Mirtazapine | 31 | 12 |
| Aripiprazole | 19 | — |
| Escitalopram Oxalate | 18 | — |
| Olanzapine | 16 | — |
| Buspirone Hcl | 15 | — |
| Risperidone | 14 | — |
| Quetiapine Fumarate | 12 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$21 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2022-04-30
- Last updated
- 2025-04-15
- Certified
- 2025-04-15
Frequently asked questions
- What is Allison Chang's NPI number?
- Allison Chang's National Provider Identifier (NPI) is 1114662574, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Allison Chang's specialty?
- Allison Chang is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Allison Chang located?
- Allison Chang's practice location on file with NPPES is 401 Quarry Rd Rm 2206, Palo Alto, CA 94304-1419.
- What is Allison Chang's phone number?
- The practice phone number listed in the NPPES registry for Allison Chang is (650) 725-0957.
- Is Allison Chang's NPI active?
- Yes — Allison Chang's NPI (1114662574) is active in the NPPES registry as of the last update on 2025-04-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.