Chuk Kwan, M.D.
NPI 1336101500 · Internal Medicine Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Chuk Kwan, M.D. is a Internal Medicine Physician provider in San Francisco, CA (NPI 1336101500).
Provider details
- NPI number
- 1336101500
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G32238 (CA)
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
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
964 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 386 | $154 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 327 | $9 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 78 | $76 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 73 | $110 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 54 | $197 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 46 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 432 | 123 |
| Losartan Potassium | 358 | 98 |
| Atorvastatin Calcium | 286 | 85 |
| Apixabanbrand: Eliquis | 263 | 71 |
| Metoprolol Succinate | 251 | 79 |
| Lovastatin | 125 | 35 |
| Lisinopril |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-04
- Last updated
- 2016-12-11
Frequently asked questions
- What is Chuk Kwan's NPI number?
- Chuk Kwan's National Provider Identifier (NPI) is 1336101500, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Chuk Kwan's specialty?
- Chuk Kwan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Chuk Kwan located?
- Chuk Kwan's practice location on file with NPPES is 929 Clay St, San Francisco, CA 94108-1556.
- What is Chuk Kwan's phone number?
- The practice phone number listed in the NPPES registry for Chuk Kwan is (415) 398-5926.
- Does Chuk Kwan accept Medicare?
- Chuk Kwan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Chuk Kwan's NPI active?
- Yes — Chuk Kwan's NPI (1336101500) is active in the NPPES registry as of the last update on 2016-12-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.