Stephen Chen, MD
NPI 1205821477 · Critical Care Medicine (Internal Medicine) Physician · Monterey Park, CA
Enrolled with Medicare as Practitioner - Critical Care (intensivists) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Chen, MD is a Critical Care Medicine (Internal Medicine) Physician provider in Monterey Park, CA (NPI 1205821477).
Provider details
- NPI number
- 1205821477
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- A71696 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
5,015 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 2,530 | $122 |
| Critical Care, First 30-74 Minutes99291 | 916 | $216 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 356 | $194 |
| Telephone Medical Discussion With Physician, 21-30 Minutes99443 | 346 | $138 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 238 | $138 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 121 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Montelukast Sodium | 621 | 134 |
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 563 | 104 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 465 | 116 |
| Fluticasone Propionate | 388 | 103 |
| Roflumilast | 339 | 58 |
| Umeclidinium Brm/Vilanterol Trbrand: Anoro Ellipta | 258 | 50 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$59,271 across 130 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
- 2005-09-14
- Last updated
- 2020-04-20
- Certified
- 2020-04-20
Frequently asked questions
- What is Stephen Chen's NPI number?
- Stephen Chen's National Provider Identifier (NPI) is 1205821477, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Chen's specialty?
- Stephen Chen is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Chen located?
- Stephen Chen's practice location on file with NPPES is 500 N Garfield Ave, Monterey Park, CA 91754-1242.
- What is Stephen Chen's phone number?
- The practice phone number listed in the NPPES registry for Stephen Chen is (626) 280-4393.
- Does Stephen Chen accept Medicare?
- Stephen Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Chen's NPI active?
- Yes — Stephen Chen's NPI (1205821477) is active in the NPPES registry as of the last update on 2020-04-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.