Cassidy Carina Liu Koo
Family Medicine Physician · Grand Terrace, CA
Cassidy Carina Liu Koo is a family medicine physician with a practice address in Grand Terrace, California, and NPI 1497495535, issued on Mar 29, 2022. Check the license (California 190520, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Cassidy Carina Liu Koo
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 190520 CA
Self-reported in NPPES; status is on the state search - Practice location
- 11980 Mount Vernon Ave, Grand Terrace, CA 92313
- Phone
- (909) 864-1097
- Enumerated
- Mar 29, 2022
- Record last updated
- Jul 15, 2025
- Medicare enrollment
- Enrolled (PECOS I20251011000095); accepts Medicare assignment
- Medical or professional school
- Un Of California, Riverside, School Of Medicine, 2022
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 11980 Mount Vernon Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Margaret Amoo, NURSE PRACTITIONERFamily Nurse Practitioner1164057022
- Noemi AvilaPediatric Nurse Practitioner1023691623
- Eric Eschweiler, DNP, RN, FNP-CFamily Nurse Practitioner1912396201
- Philip Farabaugh, MDFamily Medicine Physician1285763615
- Ramon Ferra, MDObstetrics & Gynecology Physician1285614750
- Ashley Fonseca-Tweed, FNP-BCFamily Nurse Practitioner1275316176
Verify Cassidy Carina Liu Koo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 190520Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average family medicine physician in 2024
428 Medicare Part D claims for 106 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium41 claims
- Metformin Hcl22 claims
- Gabapentin19 claims
- Amlodipine Besylate17 claims
- Lisinopril13 claims
- Escitalopram Oxalate11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Riverside-San Bernardino County Indian Health IncGrand Terrace, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Cassidy Carina Liu Koo among 17,133 family medicine physician records in California
Cassidy Carina Liu Koo is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 94% of them.
- NPI issued2022 · 94% of these records are older, 3% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2022 · median 2005 among the 10,652 with a school on file
- Record last updated2025 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
6 family medicine physician records list a practice address in Grand Terrace
They are 6 of the 204 NPPES records with a practice address in Grand Terrace, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Grand Terrace → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Philip Farabaugh, MDGrand Terrace, CA 923131285763615
- Sukhdeep Gill, M.D.Grand Terrace, CA 923131881837813
- Margaret McLeod, M.D.Grand Terrace, CA 923131144472580
- Dinh Nguyen, M.D.Grand Terrace, CA 923131750721692
- Diana Plucker, MDGrand Terrace, CA 923131568877629
- Mikel Alwis, M.D.Barstow, CA 923111790705671
- Jessica Basa, M.D.Barstow, CA 923111952360539
- Brenna Baynard-Smith, M.D.Barstow, CA 923111932195542
Common questions
What is Cassidy Carina Liu Koo's NPI number?
Cassidy Carina Liu Koo's National Provider Identifier (NPI) is 1497495535, issued on Mar 29, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Cassidy Carina Liu Koo located?
The NPPES record lists a practice address at 11980 Mount Vernon Ave, Grand Terrace, CA, 92313. Phone: (909) 864-1097. Providers update this record themselves, so call before visiting.
How can I verify Cassidy Carina Liu Koo's license?
NPPES lists California license number 190520, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Cassidy Carina Liu Koo prescribe under Medicare Part D?
In 2024, Cassidy Carina Liu Koo had 428 Medicare Part D claims for 106 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.