Johnson Chiu, MD
NPI 1356412241 · Hospitalist Physician · Orange, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Johnson Chiu, MD is a Hospitalist Physician provider in Orange, CA (NPI 1356412241).
Provider details
- NPI number
- 1356412241
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A87164 (CA)
Specialties & taxonomies
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
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
411 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 35 Minutes99232 | 219 | $81 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 67 | $119 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 52 | $179 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 25 | $82 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 24 | $51 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 17 | 17 |
| Pantoprazole Sodium | 17 | 15 |
| Furosemide | 16 | 16 |
| Losartan Potassium | 16 | 12 |
| Metronidazole | 15 | 15 |
| Cefuroxime Axetilbrand: Cefuroxime | 13 | 13 |
| Apixabanbrand: Eliquis | 13 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$75 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
- 2006-11-13
- Last updated
- 2020-10-21
- Certified
- 2020-10-21
Frequently asked questions
- What is Johnson Chiu's NPI number?
- Johnson Chiu's National Provider Identifier (NPI) is 1356412241, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Johnson Chiu's specialty?
- Johnson Chiu is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Johnson Chiu located?
- Johnson Chiu's practice location on file with NPPES is 1310 W Stewart Dr, Orange, CA 92868-3854.
- What is Johnson Chiu's phone number?
- The practice phone number listed in the NPPES registry for Johnson Chiu is (714) 639-9401.
- Does Johnson Chiu accept Medicare?
- Johnson Chiu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Johnson Chiu's NPI active?
- Yes — Johnson Chiu's NPI (1356412241) is active in the NPPES registry as of the last update on 2020-10-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.