Catharine Mary Armentrout, FNP
Nurse Practitioner · Springfield, MA
Catharine Mary Armentrout, FNP is a nurse practitioner with a practice address in Springfield, Massachusetts, and NPI 1275834061, issued on Nov 9, 2010. Check the license (Massachusetts RN2311164, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Catharine Mary Armentrout
- Credential
- FNP
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License numbers
- RN2311164 MA
336548 NY
Self-reported in NPPES; status is on the state search - Practice location
- 1049 Main St, Springfield, MA 01103
- Phone
- (413) 739-1100
- Enumerated
- Nov 9, 2010
- Record last updated
- Aug 6, 2026
- Medicare enrollment
- Enrolled (PECOS I20161020001869); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 3,480 in Massachusetts → Look up another NPI →
Also registered at 1049 Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Catharine Mary Armentrout in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license RN2311164Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average nurse practitioner in 2024
126 Medicare Part D claims for 30 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D.
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 2 group practices
- Holyoke Medical Center IncHolyoke, MA
- Umass Memorial Medical Group IncWorcester, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Catharine Mary Armentrout among 3,480 nurse practitioner records in Massachusetts
Catharine Mary Armentrout, FNP is one of 3,480 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 2010, is newer than 36% of them.
- NPI issued2010 · 36% of these records are older, 62% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 56% of these records are
- Graduated2010 · median 2017 among the 1,963 with a school on file
- Record last updated2026 · 52% 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 Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nurse Practitioner providers in Massachusetts
There are 3,480 nurse practitioner records in Massachusetts.
All 3,480 in Massachusetts → Every provider in Springfield → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Anne Marie Belinda, NPSpringfield, MA 011031114326113
- Jamie ChandonnetSpringfield, MA 011031982102695
- Carina Del ValleSpringfield, MA 011031366020703
- Samantha Ferriter, NPSpringfield, MA 011031700352465
- Kelly Hayward, FNP-BCSpringfield, MA 011031275186041
- Mariya KirikSpringfield, MA 011031437802659
- Allison Colbert, NPSpringfield, MA 011041306185962
- Candace McDougall, N.P.Springfield, MA 011041215913439
Common questions
What is Catharine Mary Armentrout, FNP's NPI number?
Catharine Mary Armentrout, FNP's National Provider Identifier (NPI) is 1275834061, issued on Nov 9, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Catharine Mary Armentrout, FNP located?
The NPPES record lists a practice address at 1049 Main St, Springfield, MA, 01103. Phone: (413) 739-1100. Providers update this record themselves, so call before visiting.
How can I verify Catharine Mary Armentrout, FNP's license?
NPPES lists Massachusetts license number RN2311164, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Catharine Mary Armentrout, FNP prescribe under Medicare Part D?
In 2024, Catharine Mary Armentrout, FNP had 126 Medicare Part D claims for 30 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.