Rainbow Chung-Ou, M.D.
NPI 1811282650 · Family Medicine Physician · Chino Hills, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Rainbow Chung-Ou, M.D. is a Family Medicine Physician provider in Chino Hills, CA (NPI 1811282650).
Provider details
- NPI number
- 1811282650
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- A122366 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
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
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
579 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 175 | $94 |
| Brief Communication Technology-Based Service, E.g. Virtual Check-In, By a Physician Or Other Qualified Health Care Professional Who Can Report Evaluation and Management Services, Provided to an Established Patient, Not Originating From a Related E/M ServicG2012 | 152 | $14 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 109 | $132 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 52 | $133 |
| Annual Alcohol Misuse Screening, 5 to 15 MinutesG0442 | 28 | $20 |
| Annual Depression Screening, 5 to 15 Minutes |
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 |
|---|---|---|
| Atorvastatin Calcium | 445 | 139 |
| Amlodipine Besylate | 256 | 79 |
| Metformin Hcl | 252 | 77 |
| Losartan Potassium | 219 | 69 |
| Lisinopril | 201 | 58 |
| Simvastatin | 183 | 45 |
| Hydrocodone/Acetaminophen |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$560 across 24 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
Additional practice locations (1)
- 5562 Philadelphia St Ste 101Chino, CA 91710-2482Phone: (909) 464-9090Fax: (909) 464-9195
Registry dates
- Enumerated
- 2011-06-09
- Last updated
- 2018-07-23
Frequently asked questions
- What is Rainbow Chung-Ou's NPI number?
- Rainbow Chung-Ou's National Provider Identifier (NPI) is 1811282650, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Rainbow Chung-Ou's specialty?
- Rainbow Chung-Ou is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Rainbow Chung-Ou located?
- Rainbow Chung-Ou's practice location on file with NPPES is 4195 Chino Hills Pkwy Ste H, Chino Hills, CA 91709.
- What is Rainbow Chung-Ou's phone number?
- The practice phone number listed in the NPPES registry for Rainbow Chung-Ou is (909) 597-7817.
- Does Rainbow Chung-Ou accept Medicare?
- Rainbow Chung-Ou is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Rainbow Chung-Ou's NPI active?
- Yes — Rainbow Chung-Ou's NPI (1811282650) is active in the NPPES registry as of the last update on 2018-07-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.