Carter Chang, MD
NPI 1427136001 · Internal Medicine Physician · Redwood City, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Carter Chang, MD is a Internal Medicine Physician provider in Redwood City, CA (NPI 1427136001).
Provider details
- NPI number
- 1427136001
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A65750 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 · 78 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 428 | 134 |
| Lisinopril | 255 | 79 |
| Amlodipine Besylate | 230 | 73 |
| Losartan Potassium | 214 | 70 |
| Hydrochlorothiazide | 188 | 63 |
| Levothyroxine Sodium | 148 | 44 |
| Simvastatin | 145 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-01
- Last updated
- 2021-12-13
Frequently asked questions
- What is Carter Chang's NPI number?
- Carter Chang's National Provider Identifier (NPI) is 1427136001, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Carter Chang's specialty?
- Carter Chang is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Carter Chang located?
- Carter Chang's practice location on file with NPPES is 1150 Veterans Blvd, Redwood City, CA 94063-2037.
- What is Carter Chang's phone number?
- The practice phone number listed in the NPPES registry for Carter Chang is (650) 299-2000.
- Does Carter Chang accept Medicare?
- Carter Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Carter Chang's NPI active?
- Yes — Carter Chang's NPI (1427136001) is active in the NPPES registry as of the last update on 2021-12-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.