Emery Chang, MD
NPI 1649221383 · Internal Medicine Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Emery Chang, MD is a Internal Medicine Physician provider in Los Angeles, CA (NPI 1649221383).
Provider details
- NPI number
- 1649221383
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A91316 (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
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
251 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 High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 94 | $146 |
| 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 | 65 | $17 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 34 | $109 |
| Admn Sarscov2 Vacc 1 Dose90480 | 16 | $47 |
| Annual Wellness Visit; Includes a Personalized Prevention Plan of Service (pps), Initial VisitG0438 | 16 | $122 |
| Online Digital Evaluation and Management Service for an Established Patient for Up to 7 Days, Total Time 5-10 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 39 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 172 | 34 |
| Bictegrav/Emtricit/Tenofov Alabrand: Biktarvy | 121 | 14 |
| Dolutegravir Sodium/Lamivudinebrand: Dovato | 96 | — |
| Metformin Hclbrand: Metformin Hcl Er | 46 | 11 |
| Omeprazole | 44 | 11 |
| Lisinopril | 43 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$118 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
- 2006-05-15
- Last updated
- 2014-02-06
Frequently asked questions
- What is Emery Chang's NPI number?
- Emery Chang's National Provider Identifier (NPI) is 1649221383, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Emery Chang's specialty?
- Emery Chang is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Emery Chang located?
- Emery Chang's practice location on file with NPPES is 1399 Roxbury Dr, Los Angeles, CA 90035-4709.
- What is Emery Chang's phone number?
- The practice phone number listed in the NPPES registry for Emery Chang is (310) 557-2273.
- Does Emery Chang accept Medicare?
- Emery Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Emery Chang's NPI active?
- Yes — Emery Chang's NPI (1649221383) is active in the NPPES registry as of the last update on 2014-02-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.