Isaac Ndungu, CNP
Gerontology Nurse Practitioner · West Springfield, MA
Isaac Ndungu, CNP is a gerontology nurse practitioner with a practice address in West Springfield, Massachusetts, and NPI 1174900690, issued on May 5, 2015. Check the license (Massachusetts RN2283072, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Isaac Ndungu
- Credential
- CNP
- Primary taxonomy
- Gerontology Nurse Practitioner 363LG0600X
- License number
- RN2283072 MA
Self-reported in NPPES; status is on the state search - Practice location
- 103 Myron St, West Springfield, MA 01089
- Phone
- (413) 592-1980
- Enumerated
- May 5, 2015
- Record last updated
- May 5, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (413) 439-0100
- Medicare enrollment
- Enrolled (PECOS I20250820005208); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest gerontology nurse practitioner records → All 379 in Massachusetts → Look up another NPI →
Also registered at 103 Myron St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Isaac Ndungu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license RN2283072Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
76% fewer Medicare Part D claims than the average gerontology nurse practitioner in 2024
333 Medicare Part D claims for 29 beneficiaries, against an average of 1,369 among the 6,165 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims.
Most prescribed
- Bupropion Xl24 claims
- Mirtazapine21 claims
- Clonazepam20 claims
- Escitalopram Oxalate19 claims
- Hydroxyzine Hcl19 claims
- Oxcarbazepine18 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
- Prosper Health And Behavioral Care ServicesRandallstown, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Isaac Ndungu among 379 gerontology nurse practitioner records in Massachusetts
Isaac Ndungu, CNP is one of 379 gerontology nurse practitioner records with a practice address in Massachusetts. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 47% of them.
- NPI issued2015 · 47% of these records are older, 51% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 51% of these records are
- Graduated2014 · median 2017 among the 192 with a school on file
- Record last updated2015 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LG0600X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
8 gerontology nurse practitioner records list a practice address in West Springfield
They are 8 of the 1,214 NPPES records with a practice address in West Springfield, and 379 gerontology nurse practitioner records in Massachusetts.
All 379 in Massachusetts → Every provider in West Springfield → Gerontology Nurse Practitioner nationwide →
The 8 gerontology nurse practitioner records with the nearest ZIP codes
- Kathryn Barzilai, NURSE PRACTITIONERWest Springfield, MA 010891730296906
- Sheryl Derderian, NPWest Springfield, MA 010891801976352
- Zhibin Fang, CNPWest Springfield, MA 010891558838995
- Jessica Fleming, MSN, CNPWest Springfield, MA 010891730660002
- Penina Marenge, NP-CWest Springfield, MA 010891891200457
- Kathleen McCarthy, NPWest Springfield, MA 010891457474074
- Sun Weaver, CNPWest Springfield, MA 010891225496078
- Angela Nurek, DNP, AGACNP-BCWare, MA 010821316750771
Common questions
What is Isaac Ndungu, CNP's NPI number?
Isaac Ndungu, CNP's National Provider Identifier (NPI) is 1174900690, issued on May 5, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Isaac Ndungu, CNP located?
The NPPES record lists a practice address at 103 Myron St, West Springfield, MA, 01089. Phone: (413) 592-1980. Providers update this record themselves, so call before visiting.
How can I verify Isaac Ndungu, CNP's license?
NPPES lists Massachusetts license number RN2283072, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Isaac Ndungu, CNP prescribe under Medicare Part D?
In 2024, Isaac Ndungu, CNP had 333 Medicare Part D claims for 29 beneficiaries; the average among gerontology nurse practitioner prescribers was 1,369. 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.