Sean Chen, MD
NPI 1336777838 · Adult Medicine Physician · Northridge, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sean Chen, MD is a Adult Medicine Physician provider in Northridge, CA (NPI 1336777838).
Provider details
- NPI number
- 1336777838
- Entity type
- Individual
- Primary specialty
- Adult Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A184478 (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
6 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
98 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) |
|---|---|---|
| Telephone Medical Discussion With Physician, 5-10 Minutes99441 | 35 | $61 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 27 | $99 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 19 | $98 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 17 | $62 |
Typical Medicare-allowed amounts for these services range $61–$99 (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 · 37 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 73 | 34 |
| Amlodipine Besylate | 51 | 20 |
| Ipratropium Bromide | 42 | 24 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 41 | 23 |
| Losartan Potassium | 40 | 16 |
| Gabapentin | 37 | 19 |
| Metformin Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$124 across 1 record (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
- 2020-03-30
- Last updated
- 2025-12-07
- Certified
- 2025-12-07
Frequently asked questions
- What is Sean Chen's NPI number?
- Sean Chen's National Provider Identifier (NPI) is 1336777838, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sean Chen's specialty?
- Sean Chen is listed in the NPPES registry with a primary specialty of Adult Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Sean Chen located?
- Sean Chen's practice location on file with NPPES is 18546 Roscoe Blvd Ste 300, Northridge, CA 91324-5458.
- What is Sean Chen's phone number?
- The practice phone number listed in the NPPES registry for Sean Chen is (818) 886-4028.
- Does Sean Chen accept Medicare?
- Sean Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sean Chen's NPI active?
- Yes — Sean Chen's NPI (1336777838) is active in the NPPES registry as of the last update on 2025-12-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.