Kassandra Dowane Neff-Castellanos, FNP-C
Nurse Practitioner · Denver, CO
Kassandra Dowane Neff-Castellanos, FNP-C is a nurse practitioner with a practice address in Denver, Colorado, and NPI 1699012187, issued on Jan 3, 2013. Check the license (Colorado APN.0992254-NP, as entered in NPPES) with the Colorado board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Kassandra Dowane Neff-Castellanos
- Credential
- FNP-C
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- APN.0992254-NP CO
Self-reported in NPPES; status is on the state search - Practice location
- 2045 N Franklin St, Denver, CO 80205
- Phone
- (303) 338-4545
- Enumerated
- Jan 3, 2013
- Record last updated
- Jun 18, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20160503001909); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 1,260 in Colorado → Look up another NPI →
Also registered at 2045 N Franklin St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Kassandra Dowane Neff-Castellanos in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Colorado board licenses this profession
Search for license APN.0992254-NPCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
57% fewer Medicare Part D claims than the average nurse practitioner in 2024
475 Medicare Part D claims for 240 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D.
Most prescribed
- Omeprazole170 claims
- Ciprofloxacin-Dexamethasone49 claims
- Triamcinolone Acetonide42 claims
- Ipratropium Bromide26 claims
- Amoxicillin-Clavulanate Potass25 claims
- Azelastine Hcl25 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
- Colorado Permanente Medical Group PCDenver, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kassandra Dowane Neff-Castellanos among 1,260 nurse practitioner records in Colorado
Kassandra Dowane Neff-Castellanos, FNP-C is one of 1,260 nurse practitioner records with a practice address in Colorado. 68% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 44% of them.
- NPI issued2013 · 44% of these records are older, 53% newer
- In a Medicare fileYes · 68% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2015 · median 2018 among the 662 with a school on file
- Record last updated2021 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nurse Practitioner providers in Colorado
There are 1,260 nurse practitioner records in Colorado.
All 1,260 in Colorado → Every provider in Denver → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Barbara Anderson, NPDenver, CO 802051962617076
- Mary Austin, NPDenver, CO 802051104018738
- Anna Cardinell, NPDenver, CO 802051306978614
- Georgia Caven, NPDenver, CO 802051487692000
- Kimberly Clonts, NPDenver, CO 802051760512602
- Elaine Jones, FNPDenver, CO 802051194742270
- Renee Kallesen, NPDenver, CO 802051194852020
- Denise Lowery, WHNPDenver, CO 802051932140415
Common questions
What is Kassandra Dowane Neff-Castellanos, FNP-C's NPI number?
Kassandra Dowane Neff-Castellanos, FNP-C's National Provider Identifier (NPI) is 1699012187, issued on Jan 3, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Kassandra Dowane Neff-Castellanos, FNP-C located?
The NPPES record lists a practice address at 2045 N Franklin St, Denver, CO, 80205. Phone: (303) 338-4545. Providers update this record themselves, so call before visiting.
How can I verify Kassandra Dowane Neff-Castellanos, FNP-C's license?
NPPES lists Colorado license number APN.0992254-NP, as entered by the provider. Search the Colorado board that licenses this profession; the NPPES record confirms identity only.
How much does Kassandra Dowane Neff-Castellanos, FNP-C prescribe under Medicare Part D?
In 2024, Kassandra Dowane Neff-Castellanos, FNP-C had 475 Medicare Part D claims for 240 beneficiaries; the average among nurse practitioner prescribers was 1,109. 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.