Aaron Chiang, M.D.
NPI 1184936379 · Internal Medicine Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Aaron Chiang, M.D. is a Internal Medicine Physician provider in Los Angeles, CA (NPI 1184936379).
Provider details
- NPI number
- 1184936379
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A118585 (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
15 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
4,893 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) |
|---|---|---|
| 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 | 438 | $17 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 437 | $98 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 353 | $9 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 290 | $8 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 250 | $10 |
| Manual Urinalysis Test With Examination Using Microscope, Automated |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 51 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 175 | 46 |
| Rosuvastatin Calcium | 147 | 45 |
| Losartan Potassium | 141 | 36 |
| Amlodipine Besylate | 129 | 33 |
| Levothyroxine Sodium | 73 | 22 |
| Levothyroxine Sodiumbrand: Synthroid | 54 | 17 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$71 across 3 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
- 2010-07-05
- Last updated
- 2022-11-02
- Certified
- 2022-11-02
Frequently asked questions
- What is Aaron Chiang's NPI number?
- Aaron Chiang's National Provider Identifier (NPI) is 1184936379, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Aaron Chiang's specialty?
- Aaron Chiang is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Aaron Chiang located?
- Aaron Chiang's practice location on file with NPPES is 2080 Century Park E Ste 1605, Los Angeles, CA 90067-2019.
- What is Aaron Chiang's phone number?
- The practice phone number listed in the NPPES registry for Aaron Chiang is (310) 620-1888.
- Does Aaron Chiang accept Medicare?
- Aaron Chiang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Aaron Chiang's NPI active?
- Yes — Aaron Chiang's NPI (1184936379) is active in the NPPES registry as of the last update on 2022-11-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.