Cassandra Karin Warner, NP
Family Nurse Practitioner · Springfield, MA
Cassandra Karin Warner, NP is a family nurse practitioner with a practice address in Springfield, Massachusetts, and NPI 1598369860, issued on Nov 26, 2020. Check the license (Massachusetts RN2315020, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Cassandra Karin Warner
- Credential
- NP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- RN2315020 MA
Self-reported in NPPES; status is on the state search - Practice location
- 2 Medical Center Dr Ste 512, Springfield, MA 01107
- Phone
- (413) 794-5550
- Enumerated
- Nov 26, 2020
- Record last updated
- Dec 13, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (413) 794-4212
- Medicare enrollment
- Enrolled (PECOS I20210303001645); may accept Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 4,724 in Massachusetts → Look up another NPI →
Also registered at 2 Medical Center Dr Ste 512
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Cassandra Karin Warner in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license RN2315020Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
25% more Medicare Part D claims than the average family nurse practitioner in 2024
1,626 Medicare Part D claims for 468 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. 179 claims were for opioids.
Most prescribed
- Oxycodone Hcl97 claims
- Eliquis89 claims
- Anastrozole80 claims
- Hydroxyurea73 claims
- Gabapentin69 claims
- Ondansetron Odt69 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.
Industry payments in 2024: $24.51
1 payment: food and beverage; the largest payer was Celgene Corporation. The 99,489 providers of this specialty with any payment received $650.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Cassandra Karin Warner among 4,724 family nurse practitioner records in Massachusetts
Cassandra Karin Warner, NP is one of 4,724 family nurse practitioner records with a practice address in Massachusetts. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 60% of them.
- NPI issued2020 · 60% of these records are older, 33% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2020 · median 2019 among the 2,704 with a school on file
- Record last updated2021 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
197 family nurse practitioner records list a practice address in Springfield
They are 197 of the 8,553 NPPES records with a practice address in Springfield, and 4,724 family nurse practitioner records in Massachusetts.
All 4,724 in Massachusetts → Every provider in Springfield → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Sharon Baribeau, NPSpringfield, MA 011071104878370
- Roberta Barron, NPSpringfield, MA 011071689629743
- Paula Brooks, NPSpringfield, MA 011071831140987
- Helen Clark, NPSpringfield, MA 011071124098876
- Rebecca Delisa, NPSpringfield, MA 011071033196530
- Helen James, NPSpringfield, MA 011071891717344
- Mary Kinne, NPSpringfield, MA 011071235187840
- Maria Lankowski, APRNSpringfield, MA 011071891766556
Common questions
What is Cassandra Karin Warner, NP's NPI number?
Cassandra Karin Warner, NP's National Provider Identifier (NPI) is 1598369860, issued on Nov 26, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Cassandra Karin Warner, NP located?
The NPPES record lists a practice address at 2 Medical Center Dr Ste 512, Springfield, MA, 01107. Phone: (413) 794-5550. Providers update this record themselves, so call before visiting.
How can I verify Cassandra Karin Warner, NP's license?
NPPES lists Massachusetts license number RN2315020, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Cassandra Karin Warner, NP prescribe under Medicare Part D?
In 2024, Cassandra Karin Warner, NP had 1,626 Medicare Part D claims for 468 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.