Cassidy Koo
NPI 1497495535 · Family Medicine Physician · Grand Terrace, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Cassidy Koo is a Family Medicine Physician provider in Grand Terrace, CA (NPI 1497495535).
Provider details
- NPI number
- 1497495535
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- No
- License
- 190520 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
4 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 41 | 19 |
| Metformin Hcl | 22 | — |
| Gabapentin | 19 | — |
| Amlodipine Besylate | 17 | — |
| Lisinopril | 13 | — |
| Escitalopram Oxalate | 11 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2022-03-29
- Last updated
- 2025-07-15
- Certified
- 2025-07-15
Frequently asked questions
- What is Cassidy Koo's NPI number?
- Cassidy Koo's National Provider Identifier (NPI) is 1497495535, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Cassidy Koo's specialty?
- Cassidy Koo is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Cassidy Koo located?
- Cassidy Koo's practice location on file with NPPES is 11980 Mount Vernon Ave, Grand Terrace, CA 92313-5172.
- What is Cassidy Koo's phone number?
- The practice phone number listed in the NPPES registry for Cassidy Koo is (909) 864-1097.
- Does Cassidy Koo accept Medicare?
- Cassidy Koo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Cassidy Koo's NPI active?
- Yes — Cassidy Koo's NPI (1497495535) is active in the NPPES registry as of the last update on 2025-07-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.