Henry Chang, D.O.
NPI 1740430289 · Internal Medicine Physician · West Covina, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Henry Chang, D.O. is a Internal Medicine Physician provider in West Covina, CA (NPI 1740430289).
Provider details
- NPI number
- 1740430289
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 20A10516 (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
17 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
841 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 High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 751 | $195 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 72 | $140 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 18 | $237 |
Typical Medicare-allowed amounts for these services range $140–$237 (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 · 85 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 643 | 195 |
| Losartan Potassium | 553 | 157 |
| Metoprolol Succinate | 391 | 115 |
| Amlodipine Besylate | 314 | 89 |
| Metformin Hcl | 289 | 84 |
| Tamsulosin Hcl | 122 | 33 |
| Baclofen | 113 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$918 across 33 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
- 2008-09-21
- Last updated
- 2010-11-20
Frequently asked questions
- What is Henry Chang's NPI number?
- Henry Chang's National Provider Identifier (NPI) is 1740430289, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Henry Chang's specialty?
- Henry Chang is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Henry Chang located?
- Henry Chang's practice location on file with NPPES is 2707 E Valley Blvd, West Covina, CA 91792-3195.
- What is Henry Chang's phone number?
- The practice phone number listed in the NPPES registry for Henry Chang is (626) 581-0486.
- Does Henry Chang accept Medicare?
- Henry Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Henry Chang's NPI active?
- Yes — Henry Chang's NPI (1740430289) is active in the NPPES registry as of the last update on 2010-11-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.