Kook Chang, M.D.
NPI 1356442354 · Internal Medicine Physician · Van Nuys, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kook Chang, M.D. is a Internal Medicine Physician provider in Van Nuys, CA (NPI 1356442354).
Provider details
- NPI number
- 1356442354
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A 40580 (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
1,095 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 | 606 | $132 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 191 | $15 |
| Blood Glucose (sugar) Test Performed By Hand-Held Instrument82962 | 116 | $3 |
| Administration of Influenza Virus VaccineG0008 | 61 | $29 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 57 | $59 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 126 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 527 | 125 |
| Atorvastatin Calcium | 493 | 127 |
| Losartan Potassium | 445 | 103 |
| Amlodipine Besylate | 410 | 94 |
| Celecoxib | 356 | 79 |
| Tamsulosin Hcl | 296 | 75 |
| Levocetirizine Dihydrochloride | 278 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$787 across 18 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
- 2006-09-25
- Last updated
- 2014-05-16
Frequently asked questions
- What is Kook Chang's NPI number?
- Kook Chang's National Provider Identifier (NPI) is 1356442354, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kook Chang's specialty?
- Kook Chang is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Kook Chang located?
- Kook Chang's practice location on file with NPPES is 14600 Sherman Way Ste 270, Van Nuys, CA 91405-2272.
- What is Kook Chang's phone number?
- The practice phone number listed in the NPPES registry for Kook Chang is (818) 780-7771.
- Does Kook Chang accept Medicare?
- Kook Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kook Chang's NPI active?
- Yes — Kook Chang's NPI (1356442354) is active in the NPPES registry as of the last update on 2014-05-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.