Karen Castellano, FNP-BC
NPI 1821695552 · Family Nurse Practitioner · West Covina, CA
Karen Castellano, FNP-BC is a Family Nurse Practitioner provider in West Covina, CA (NPI 1821695552).
Provider details
- NPI number
- 1821695552
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP-BC
- Sex
- Female
- Sole proprietor
- Yes
- License
- 95012925 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
5 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 · 19 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 69 | 30 |
| Amlodipine Besylate | 38 | 17 |
| Lisinopril | 28 | — |
| Metformin Hcl | 28 | 14 |
| Simvastatin | 24 | — |
| Levothyroxine Sodium | 24 | 14 |
| Ergocalciferol (vitamin D2)brand: Vitamin D2 | 22 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$23 across 1 record (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
- 2020-10-06
- Last updated
- 2023-03-01
- Certified
- 2023-03-01
Frequently asked questions
- What is Karen Castellano's NPI number?
- Karen Castellano's National Provider Identifier (NPI) is 1821695552, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Castellano's specialty?
- Karen Castellano is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Karen Castellano located?
- Karen Castellano's practice location on file with NPPES is 1115 S Sunset Ave, West Covina, CA 91790-3940.
- What is Karen Castellano's phone number?
- The practice phone number listed in the NPPES registry for Karen Castellano is (626) 962-4011.
- Is Karen Castellano's NPI active?
- Yes — Karen Castellano's NPI (1821695552) is active in the NPPES registry as of the last update on 2023-03-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.