Kelvin Chen, MD
NPI 1225387137 · Internal Medicine Physician · Rosemead, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kelvin Chen, MD is a Internal Medicine Physician provider in Rosemead, CA (NPI 1225387137).
Provider details
- NPI number
- 1225387137
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- A 129170 (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
13 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
605 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) |
|---|---|---|
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 525 | $175 |
| Advance Care Planning, First 30 Minutes99497 | 42 | $77 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 38 | $119 |
Typical Medicare-allowed amounts for these services range $77–$175 (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 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 89 | 23 |
| Tamsulosin Hcl | 41 | 14 |
| Losartan Potassium | 37 | 11 |
| Allopurinol | 34 | — |
| Metformin Hcl | 31 | — |
| Pantoprazole Sodium | 26 | — |
| Rosuvastatin Calcium | 25 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-09-06
- Last updated
- 2025-05-01
- Certified
- 2025-05-01
Frequently asked questions
- What is Kelvin Chen's NPI number?
- Kelvin Chen's National Provider Identifier (NPI) is 1225387137, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kelvin Chen's specialty?
- Kelvin Chen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Kelvin Chen located?
- Kelvin Chen's practice location on file with NPPES is 2421 San Gabriel Blvd, Rosemead, CA 91770-3653.
- What is Kelvin Chen's phone number?
- The practice phone number listed in the NPPES registry for Kelvin Chen is (626) 741-5411.
- Does Kelvin Chen accept Medicare?
- Kelvin Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kelvin Chen's NPI active?
- Yes — Kelvin Chen's NPI (1225387137) is active in the NPPES registry as of the last update on 2025-05-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.