Kassandra Neff-Castellanos, FNP-C
NPI 1699012187 · Nurse Practitioner · Denver, CO
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kassandra Neff-Castellanos, FNP-C is a Nurse Practitioner provider in Denver, CO (NPI 1699012187).
Provider details
- NPI number
- 1699012187
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP-C
- Sex
- Female
- Sole proprietor
- No
- License
- APN.0992254-NP (CO)
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 tenure38% of score
13 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 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 170 | 75 |
| Ciprofloxacin Hcl/Dexamethbrand: Ciprofloxacin-Dexamethasone | 49 | 28 |
| Triamcinolone Acetonide | 42 | 24 |
| Ipratropium Bromide | 26 | 11 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 25 | 24 |
| Azelastine Hcl | 25 | — |
| Prednisone | 25 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-01-03
- Last updated
- 2021-06-18
- Certified
- 2021-06-18
Frequently asked questions
- What is Kassandra Neff-Castellanos's NPI number?
- Kassandra Neff-Castellanos's National Provider Identifier (NPI) is 1699012187, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kassandra Neff-Castellanos's specialty?
- Kassandra Neff-Castellanos is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Kassandra Neff-Castellanos located?
- Kassandra Neff-Castellanos's practice location on file with NPPES is 2045 N Franklin St, Denver, CO 80205.
- What is Kassandra Neff-Castellanos's phone number?
- The practice phone number listed in the NPPES registry for Kassandra Neff-Castellanos is (303) 338-4545.
- Does Kassandra Neff-Castellanos accept Medicare?
- Kassandra Neff-Castellanos is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kassandra Neff-Castellanos's NPI active?
- Yes — Kassandra Neff-Castellanos's NPI (1699012187) is active in the NPPES registry as of the last update on 2021-06-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.