Johnson Chan, MD
NPI 1871679720 · Hospitalist Physician · San Jose, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Johnson Chan, MD is a Hospitalist Physician provider in San Jose, CA (NPI 1871679720).
Provider details
- NPI number
- 1871679720
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A60316 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 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
37 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 24 | $88 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 13 | $93 |
Typical Medicare-allowed amounts for these services range $88–$93 (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 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metoprolol Tartrate | 22 | 21 |
| Amlodipine Besylate | 17 | 15 |
| Gabapentin | 15 | 13 |
| Levofloxacin | 15 | 15 |
| Ciprofloxacin Hcl | 13 | 12 |
| Syrge-Ndl,ins 0.3 Ml Half Markbrand: Veo Insulin Syringe | 13 | — |
| Atorvastatin Calcium | 12 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-31
- Last updated
- 2021-12-22
Frequently asked questions
- What is Johnson Chan's NPI number?
- Johnson Chan's National Provider Identifier (NPI) is 1871679720, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Johnson Chan's specialty?
- Johnson Chan is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Johnson Chan located?
- Johnson Chan's practice location on file with NPPES is 260 International Cir, San Jose, CA 95119-1130.
- What is Johnson Chan's phone number?
- The practice phone number listed in the NPPES registry for Johnson Chan is (408) 972-7000.
- Does Johnson Chan accept Medicare?
- Johnson Chan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Johnson Chan's NPI active?
- Yes — Johnson Chan's NPI (1871679720) is active in the NPPES registry as of the last update on 2021-12-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.