Kenneth Chang, MD
NPI 1609832724 · Internal Medicine Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kenneth Chang, MD is a Internal Medicine Physician provider in San Francisco, CA (NPI 1609832724).
Provider details
- NPI number
- 1609832724
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- A55424 (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
20 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
2,068 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 1,150 | $109 |
| Administration of Influenza Virus VaccineG0008 | 247 | $39 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 240 | $156 |
| Blood Glucose (sugar) Test Performed By Hand-Held Instrument82962 | 135 | $3 |
| Admn Sarscov2 Vacc 1 Dose90480 | 127 | $52 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 70 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 156 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 1,910 | 543 |
| Amlodipine Besylate | 1,506 | 427 |
| Losartan Potassium | 1,318 | 351 |
| Metformin Hcl | 955 | 251 |
| Triamcinolone Acetonide | 629 | 288 |
| Omeprazole | 591 | 228 |
| Atenolol | 509 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$83 across 4 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
- 2006-04-26
- Last updated
- 2010-03-03
Frequently asked questions
- What is Kenneth Chang's NPI number?
- Kenneth Chang's National Provider Identifier (NPI) is 1609832724, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kenneth Chang's specialty?
- Kenneth Chang is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Kenneth Chang located?
- Kenneth Chang's practice location on file with NPPES is 728 Pacific Ave, San Francisco, CA 94133-4449.
- What is Kenneth Chang's phone number?
- The practice phone number listed in the NPPES registry for Kenneth Chang is (415) 421-4525.
- Does Kenneth Chang accept Medicare?
- Kenneth Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kenneth Chang's NPI active?
- Yes — Kenneth Chang's NPI (1609832724) is active in the NPPES registry as of the last update on 2010-03-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.