Emy Chen, MD
NPI 1689741910 · Rheumatology Physician · Arcadia, CA
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Emy Chen, MD is a Rheumatology Physician provider in Arcadia, CA (NPI 1689741910).
Provider details
- NPI number
- 1689741910
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A70838 (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
19 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
1,937 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 882 | $139 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 258 | $18 |
| Administration of Non-Hormonal Anti-Neoplastic Chemotherapy Under Skin Or Into Muscle96401 | 237 | $84 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 229 | $16 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 61 | $182 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 57 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 80 | 21 |
| Hydroxychloroquine Sulfate | 78 | 19 |
| Methotrexate Sodiumbrand: Methotrexate | 60 | 16 |
| Tizanidine Hcl | 53 | 12 |
| Tramadol Hcl | 50 | — |
| Meloxicam | 46 | 16 |
| Sulfasalazine | 46 | 11 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$657 across 27 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
- 2006-11-30
- Last updated
- 2020-11-20
- Certified
- 2020-11-20
Frequently asked questions
- What is Emy Chen's NPI number?
- Emy Chen's National Provider Identifier (NPI) is 1689741910, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Emy Chen's specialty?
- Emy Chen is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Emy Chen located?
- Emy Chen's practice location on file with NPPES is 488 E Santa Clara St, Arcadia, CA 91006-7229.
- What is Emy Chen's phone number?
- The practice phone number listed in the NPPES registry for Emy Chen is (626) 357-6808.
- Does Emy Chen accept Medicare?
- Emy Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Emy Chen's NPI active?
- Yes — Emy Chen's NPI (1689741910) is active in the NPPES registry as of the last update on 2020-11-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.