Hsu-Hsiang Chang, D.O.
NPI 1932546603 · Emergency Medicine Physician · Pomona, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Hsu-Hsiang Chang, D.O. is a Emergency Medicine Physician provider in Pomona, CA (NPI 1932546603).
Provider details
- NPI number
- 1932546603
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 5101020307 (MI)
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 tenure28% of score
13 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
507 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 170 | $183 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 165 | $9 |
| Critical Care, First 30-74 Minutes99291 | 133 | $225 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 39 | $127 |
Typical Medicare-allowed amounts for these services range $9–$225 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cephalexin | 96 | 94 |
| Ondansetronbrand: Ondansetron Odt | 90 | 90 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 70 | 70 |
| Ibuprofen | 51 | 47 |
| Prednisone | 37 | 37 |
| Naloxone Hcl | 30 | 29 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa |
Practice location
Mailing address
Additional practice locations (1)
- 1025 S Anaheim BlvdAnaheim, CA 92805-5806Phone: (714) 563-2808
Registry dates
- Enumerated
- 2013-06-04
- Last updated
- 2023-09-21
Frequently asked questions
- What is Hsu-Hsiang Chang's NPI number?
- Hsu-Hsiang Chang's National Provider Identifier (NPI) is 1932546603, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Hsu-Hsiang Chang's specialty?
- Hsu-Hsiang Chang is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Hsu-Hsiang Chang located?
- Hsu-Hsiang Chang's practice location on file with NPPES is 1798 N Garey Ave, Pomona, CA 91767-2918.
- What is Hsu-Hsiang Chang's phone number?
- The practice phone number listed in the NPPES registry for Hsu-Hsiang Chang is (909) 865-9917.
- Does Hsu-Hsiang Chang accept Medicare?
- Hsu-Hsiang Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Hsu-Hsiang Chang's NPI active?
- Yes — Hsu-Hsiang Chang's NPI (1932546603) is active in the NPPES registry as of the last update on 2023-09-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.