Alison Chang, MD
NPI 1205253465 · Hematology & Oncology Physician · Palo Alto, CA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alison Chang, MD is a Hematology & Oncology Physician provider in Palo Alto, CA (NPI 1205253465).
Provider details
- NPI number
- 1205253465
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A139702 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
12 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
4,092 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 614 | $156 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, 1 Hour Or Less96365 | 541 | $85 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 414 | $177 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 401 | $216 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, Each Additional Hour96366 | 350 | $26 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'S |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 31 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 289 | 94 |
| Letrozole | 191 | 60 |
| Hydroxyurea | 108 | 33 |
| Exemestane | 90 | 37 |
| Apixabanbrand: Eliquis | 64 | 25 |
| Prednisone | 53 | 17 |
| Lenalidomide | 52 | — |
| Apalutamidebrand: Erleada |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$262 across 2 records (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
- 2014-03-26
- Last updated
- 2020-08-03
- Certified
- 2020-08-03
Frequently asked questions
- What is Alison Chang's NPI number?
- Alison Chang's National Provider Identifier (NPI) is 1205253465, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alison Chang's specialty?
- Alison Chang is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Alison Chang located?
- Alison Chang's practice location on file with NPPES is 795 El Camino Real, Palo Alto, CA 94301-2302.
- What is Alison Chang's phone number?
- The practice phone number listed in the NPPES registry for Alison Chang is (650) 853-2905.
- Does Alison Chang accept Medicare?
- Alison Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alison Chang's NPI active?
- Yes — Alison Chang's NPI (1205253465) is active in the NPPES registry as of the last update on 2020-08-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.