NPPES file of Aug 9, 2026

Kerrianne O'Brien Barreto, NP-C

Acute Care Nurse Practitioner · Worcester, MA

Kerrianne O'Brien Barreto, NP-C is an acute care nurse practitioner with a practice address in Worcester, Massachusetts, and NPI 1124421862, issued on Oct 8, 2014. Check the license (Massachusetts RN283028, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1124421862
Name
Kerrianne O'Brien Barreto
Credential
NP-C
Primary taxonomy
Acute Care Nurse Practitioner 363LA2100X
License number
RN283028 MA
Self-reported in NPPES; status is on the state search
Practice location
416 Belmont St, Worcester, MA 01604
Phone
(915) 667-2684
Enumerated
Oct 8, 2014
Record last updated
Nov 24, 2025
Medicare enrollment
Enrolled (PECOS I20190301000866); may accept Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 416 Belmont St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Amanda Clancey, NPPrimary Care Nurse Practitioner1972938983
  2. Kristen Derosa, NNP-BC, ACNPC-AGAcute Care Nurse Practitioner1003469230
  3. Roberta JohnsonNurse Practitioner1558070466
  4. Addie Lawrence, N.P.Nurse Practitioner1639231426
  5. Amanda Murray, NPAdult Health Nurse Practitioner1427576453
  6. Kathleen Spadoni, FNP-BCFamily Nurse Practitioner1649641689

Verify Kerrianne O'Brien Barreto in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
    Search for license RN283028    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Massachusetts license search

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94% more Medicare Part D claims than the average acute care nurse practitioner in 2024

1,155 Medicare Part D claims for 133 beneficiaries, against an average of 594 among the 13,133 providers of this specialty who prescribed in Part D. 38 claims were for opioids.

  1. Kerrianne Barreto1,155
  2. Specialty average594

Most prescribed

  1. Levothyroxine Sodium65 claims
  2. Atorvastatin Calcium64 claims
  3. Sertraline Hcl53 claims
  4. Amlodipine Besylate49 claims
  5. Losartan Potassium48 claims
  6. Mirtazapine37 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.

Acute Care Nurse Practitioner providers in Massachusetts

There are 598 acute care nurse practitioner records in Massachusetts.

All 598 in Massachusetts → Every provider in Worcester →

Other acute care nurse practitioner records in Massachusetts

  1. Allison AditaysWorcester, MA1326602442
  2. Sandra Aiello, APRNWorcester, MA1063707990
  3. Tina AlibozekPittsfield, MA1023517380
  4. Christopher AllenBoston, MA1174139976
  5. Julia Allen, NPBoston, MA1275969370
  6. Heidi Almodovar, PNPBoston, MA1922324250
  7. Jennifer Aman, NPBoston, MA1053966234
  8. Kristina Amaral, CNPFall River, MA1881164184
  9. Mary Amatangelo, NPBoston, MA1114191442
  10. Jaines Andrades, NPSpringfield, MA1649898065

Common questions

What is Kerrianne O'Brien Barreto, NP-C's NPI number?

Kerrianne O'Brien Barreto, NP-C's National Provider Identifier (NPI) is 1124421862, issued on Oct 8, 2014. An NPI identifies a provider in billing; it is not a license.

Where is Kerrianne O'Brien Barreto, NP-C located?

The NPPES record lists a practice address at 416 Belmont St, Worcester, MA, 01604. Phone: (915) 667-2684. Providers update this record themselves, so call before visiting.

How can I verify Kerrianne O'Brien Barreto, NP-C's license?

NPPES lists Massachusetts license number RN283028, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.

How much does Kerrianne O'Brien Barreto, NP-C prescribe under Medicare Part D?

In 2024, Kerrianne O'Brien Barreto, NP-C had 1,155 Medicare Part D claims for 133 beneficiaries; the average among acute care nurse practitioner prescribers was 594. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.