1. Home
  2. Directory
  3. Massachusetts
  4. Worcester
  5. Nurse Practitioner
  6. NPI Profile

MRS. KERRIANNE O'BRIEN BARRETO NP-C
NPI 1124421862
Nurse Practitioner - Acute Care in Worcester, MA

Active since October 08, 2014PECOS EnrolledAccepts Medicare Assignment
416 BELMONT ST, WORCESTER, MA 01604(915) 667-2684 Get Directions Write a Review

NPPES record last updated: November 24, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Nov 24, 2025, Mar 5, 2019, Feb 20, 2019 (3 updates tracked since 2019).

About Mrs. Kerrianne O'brien Barreto Np-c NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MRS. KERRIANNE O'BRIEN BARRETO NP-C (NPI 1124421862) is an individual acute care provider in Worcester, Massachusetts, licensed in Massachusetts (RN283028) and active in the NPI registry since October 2014. She is enrolled in Medicare PECOS and is a graduate of Other (2014).

NPPES Registry Identity

NPI1124421862
Entity TypeIndividualFemale
Primary Taxonomy363LA2100X
Provider Legal NameMRS. KERRIANNE O'BRIEN BARRETOCredential: NP-C
Location Address416 BELMONT STWorcester, MA 01604
Mailing Address67 Millbrook St Ste 406aWorcester, MA 01606-2845 · (508) 283-4513 · Fax (508) 469-4057
Phone(915) 667-2684
Sole ProprietorNo
Medical School CMSOtherGraduated 2014
Enumeration DateOctober 8, 2014
Last NPPES UpdateNovember 24, 20253 updates tracked since enumeration
NPPES CertifiedNovember 24, 2025
✔ NPI 1124421862 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · Acute CarePhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LA2100X
License✔ Licensed in MA · RN283028
416 BELMONT ST, Worcester, MA 01604
Open in Google Maps ↗

Other Names 1

Former Name (1)Kerrianne O'brien Hanlon Aprn

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mrs. Kerrianne O'brien Barreto Np-c is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3476870254
PECOS Enrollment IDI20190301000866
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Kerrianne Barreto reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Worcester Internal Medicine, Inc.
Same address
Internal Medicine
416 BELMONT ST
Worcester, MA 01604
  • Reassigned Medicare billing, Massachusetts enrollment
  • 22 clinicians in this Medicare group
NPI 1063565422 (508) 756-1808
Integral Health Partners LLC
2.3 mi
Nurse Practitioner
67 MILLBROOK ST STE 406A
Worcester, MA 01606
  • Reassigned Medicare billing, Massachusetts enrollment
  • 16 clinicians in this Medicare group
NPI 1679183545 (508) 283-4513

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 9

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes 99309
A follow-up nursing facility visit per day is a daily check-in by a healthcare professional. This 25-minute visit typically involves monitoring your health progress, addressing any concerns, and adjusting treatment plans as necessary. It's a vital part of ensuring your ongoing wellbeing.
307 services110 patients
Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes 99310
A follow-up nursing facility visit is a routine check-up that typically lasts about 35 minutes. During this visit, your health status is evaluated, any changes in your condition are noted, and necessary adjustments to your care plan are made. It's an essential part of maintaining your health.
249 services140 patients
Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more 99308
A follow-up nursing facility visit per day is a daily check-up service provided by healthcare professionals. It lasts around 15 minutes and involves assessing your health status, monitoring your recovery progress, and addressing any concerns you may have about your health or treatment.
205 services95 patients
Nursing facility discharge management, more than 30 minutes 99316
Nursing facility discharge management over 30 minutes is a comprehensive process where a healthcare team prepares you for leaving the facility. It involves creating a tailored plan, coordinating care, and ensuring a smooth transition to your next care setting.
119 services110 patients
Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes 99309
A follow-up nursing facility visit per day is a daily check-in by a healthcare professional. This 25-minute visit typically involves monitoring your health progress, addressing any concerns, and adjusting treatment plans as necessary. It's a vital part of ensuring your ongoing wellbeing.
79 services26 patients
Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes 99310
A follow-up nursing facility visit is a routine check-up that typically lasts about 35 minutes. During this visit, your health status is evaluated, any changes in your condition are noted, and necessary adjustments to your care plan are made. It's an essential part of maintaining your health.
34 services18 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 01604 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$90.70 typical visit price
range $58.86 – $177.36
Typical copayment $22.67 (range $14.71 – $44.34)
Most-billed visit code 99203
Established Patient
$103.48 typical visit price
range $19.11 – $144.84
Typical copayment $25.87 (range $4.77 – $36.21)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 8

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

KRISTEN M DEROSA NNP-BC, ACNPC-AG
Nurse Practitioner (Acute Care)
416 BELMONT ST
WORCESTER, MA 01604
Worcester County (508) 756-6609
WORCESTER INTERNAL MEDICINE, INC.
Internal Medicine
416 BELMONT ST
WORCESTER, MA 01604
Worcester County (508) 756-1808
AMANDA MURRAY NP
Nurse Practitioner (Adult Health)
416 BELMONT ST
WORCESTER, MA 01604
Worcester County (508) 756-6609
GLOBAL COMMUNITY COMPREHENSIVE PSYCHIATRIC CARE
Nurse Practitioner (Psychiatric/Mental Health)
416 BELMONT ST
WORCESTER, MA 01604
Worcester County (508) 736-0244
WORCESTER INTERNAL MEDICINE
Nurse Practitioner (Primary Care)
416 BELMONT ST
WORCESTER, MA 01604
Worcester County (508) 756-1808
ADDIE LAWRENCE N.P.
Nurse Practitioner
416 BELMONT ST
WORCESTER, MA 01604
Worcester County (508) 756-1808
MRS. KATHLEEN MARIE SPADONI FNP-BC
Nurse Practitioner (Family)
416 BELMONT ST, WORCESTER INTERNAL MEDICINE
WORCESTER, MA 01604
Worcester County (508) 756-6609
MRS. AMANDA JANE-BEAN CLANCEY NP
Nurse Practitioner (Primary Care)
416 BELMONT ST
WORCESTER, MA 01604
Worcester County (508) 756-6609

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Kerrianne Barreto's NPI number?

The NPI number for Kerrianne Barreto is 1124421862. It was assigned to this individual provider in the NPPES registry on October 8, 2014. The provider is also known as Kerrianne O'brien Hanlon Aprn.

Where is Kerrianne Barreto located?

Kerrianne Barreto practices at 416 Belmont St, Worcester, MA 01604. The listed phone number is (915) 667-2684.

What is Kerrianne Barreto's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Acute Care, with taxonomy code 363LA2100X.

Is Kerrianne Barreto enrolled in Medicare?

Yes. Kerrianne Barreto is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Kerrianne Barreto's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Kerrianne Barreto reassigns Medicare benefits to 2 organizations: Worcester Internal Medicine, Inc. (Worcester, MA) and Integral Health Partners LLC (Worcester, MA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Kerrianne Barreto's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Kerrianne Barreto was last updated on November 24, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.