Chuan-Hsin Chang, M.D.
NPI 1033377841 · Endocrinology, Diabetes & Metabolism Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Chuan-Hsin Chang, M.D. is a Endocrinology, Diabetes & Metabolism Physician provider in San Francisco, CA (NPI 1033377841).
Provider details
- NPI number
- 1033377841
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
18 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
738 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 224 | $6 |
| Blood Test, Basic Group of Blood Chemicals (calcium, Total)80048 | 180 | $8 |
| Hemoglobin A1c Level83036 | 153 | $10 |
| Thyroxine (thyroid Chemical), Free84439 | 69 | $9 |
| Blood Test, Thyroid Stimulating Hormone (tsh)84443 | 69 | $16 |
| Vitamin D-3 Level82306 | 43 | $29 |
Typical Medicare-allowed amounts for these services range $6–$29 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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 · 40 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metformin Hcl | 242 | 81 |
| Empagliflozinbrand: Jardiance | 216 | 75 |
| Dulaglutidebrand: Trulicity | 159 | 35 |
| Sitagliptin Phosphatebrand: Januvia | 140 | 56 |
| Glipizide | 121 | 45 |
| Semaglutidebrand: Ozempic | 101 | 26 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-05-28
- Last updated
- 2017-01-18
Frequently asked questions
- What is Chuan-Hsin Chang's NPI number?
- Chuan-Hsin Chang's National Provider Identifier (NPI) is 1033377841, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Chuan-Hsin Chang's specialty?
- Chuan-Hsin Chang is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Chuan-Hsin Chang located?
- Chuan-Hsin Chang's practice location on file with NPPES is 1520 Stockton St, San Francisco, CA 94133-3354.
- What is Chuan-Hsin Chang's phone number?
- The practice phone number listed in the NPPES registry for Chuan-Hsin Chang is (415) 391-9686.
- Does Chuan-Hsin Chang accept Medicare?
- Chuan-Hsin Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Chuan-Hsin Chang's NPI active?
- Yes — Chuan-Hsin Chang's NPI (1033377841) is active in the NPPES registry as of the last update on 2017-01-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.