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CAROLYN M O'BRIEN N.P
NPI 1104815539
Nurse Practitioner - Adult Health in Franklin, MA

Active since October 18, 2005PECOS EnrolledAccepts Medicare Assignment
31 DANIELS ST, FRANKLIN, MA 02038(508) 530-3140(508) 538-3142 Get Directions Write a Review

NPPES record last updated: August 28, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Carolyn M O'brien N.p NPPES

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

CAROLYN M O'BRIEN N.P (NPI 1104815539) is an individual adult health provider in Franklin, Massachusetts, licensed in Massachusetts (190716) and active in the NPI registry since October 2005. She is enrolled in Medicare PECOS, is affiliated with Milford Regional Medical Center, and maintains a secondary practice location in Northbridge.

NPPES Registry Identity

NPI1104815539
Entity TypeIndividualFemale
Primary Taxonomy363LA2200X
Provider Legal NameCAROLYN M O'BRIENCredential: N.P
Location Address31 DANIELS STFranklin, MA 02038-1103
Mailing AddressPo Box 383Franklin, MA 02038-0383 · (508) 530-3140 · Fax (508) 530-3142
Phone(508) 530-3140
Fax(508) 538-3142
Sole ProprietorYes
Medical School CMSOtherGraduated 1996
Enumeration DateOctober 18, 2005
Last NPPES UpdateAugust 28, 2025
NPPES CertifiedAugust 28, 2025
✔ NPI 1104815539 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse Practitioner · Adult HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LA2200X
License✔ Licensed in MA · 190716
Also ListedNurse PractitionerTaxonomy 363L00000X · License RN190716 (MA)
31 DANIELS ST, Franklin, MA 02038
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Secondary Practice Location 1

Location 1100 Commerce DrNorthbridge, MA 01534-1415 · Phone (508) 234-6311

Other Identifiers 1

Medicaid0384950MA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Taro Health.Insurance ›

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

Carolyn M O'brien N.p 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 ID6608899521
PECOS Enrollment IDI20060106000179
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 Carolyn O'brien reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Milford Regional Physician Group, Inc.
6.3 mi
Internal Medicine
9 INDUSTRIAL RD, SUITE 5
Milford, MA 01757
  • Reassigned Medicare billing, Massachusetts enrollment
  • 238 clinicians in this Medicare group
NPI 1902856024 (508) 473-1480
Umass Memorial Medical Group Inc
22 mi
Internal Medicine
55 LAKE AVE N
Worcester, MA 01655
  • Reassigned Medicare billing, Massachusetts enrollment
  • 2,902 clinicians in this Medicare group
NPI 1760445373 (508) 334-1000

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 5

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.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
79 services74 patients
Residence visit for established patient with high level of medical decision making, per day, if using time, at least 60 minutes 99350
An established patient home visit is a service where a healthcare professional visits a patient's home for a check-up or treatment. The visit typically lasts for about an hour. This service is especially beneficial for patients who may have difficulty traveling to a healthcare facility.
50 services27 patients
Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes 99349
An established patient home visit is a medical appointment conducted at your home, typically lasting around 40 minutes. This service is ideal for patients who may find it difficult to travel to a healthcare facility. During this visit, a healthcare professional will evaluate your health status, manage your care, and answer any health-related questions you may have.
23 services16 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
13 services13 patients
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212
This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.
12 services12 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Milford Regional Medical Center

Acute Care Hospitals · Milford, MA
4/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number220090
Location14 Prospect StreetMilford, MA 01757 · Worcester County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02038 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
$97.64 typical visit price
range $63.72 – $189.86
Typical copayment $24.41 (range $15.93 – $47.46)
Most-billed visit code 99203
Established Patient
$111.18 typical visit price
range $21.07 – $155.29
Typical copayment $27.79 (range $5.26 – $38.82)
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

Reported Quality Measures

Care Plan
Percentage of patients aged 65 years and older who have an advance care plan or surrogate decision maker documented in the medical record that an advance care plan was discussed but the patient did not wish or was not able to name a surrogate decision maker…
100%176 patients5/55-star benchmark: 100%
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Referred Medical Equipment & Supplies CMS DME claims 2

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Enteral feeding supply kit; syringe fed, per day, includes but not limited to feeding/flushing syringe, administration set tubing, dressings, tape B4034
Other-Enteral and Parenteral · category OB006N
1 supplier12 claims372 services$2.72 avg. paid by Medicare
Enteral formula, nutritionally complete, calorically dense (equal to or greater than 1.5 kcal/ml) with intact nutrients, includes proteins, fats, carbohydrates, vitamins and minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit B4152
Other-Enteral and Parenteral · category OB006N
2 suppliers15 claims8,985 services$0.26 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES

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

KATE A BARBA
Nurse Practitioner (Gerontology)
31 DANIELS ST
FRANKLIN, MA 02038
Norfolk County (508) 530-3140

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 Carolyn O'brien's NPI number?

The NPI number for Carolyn O'brien is 1104815539. It was assigned to this individual provider in the NPPES registry on October 18, 2005.

Where is Carolyn O'brien located?

Carolyn O'brien practices at 31 Daniels St, Franklin, MA 02038. The listed phone number is (508) 530-3140.

What is Carolyn O'brien's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Adult Health, with taxonomy code 363LA2200X.

Is Carolyn O'brien enrolled in Medicare?

Yes. Carolyn O'brien 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 Carolyn O'brien's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Carolyn O'brien reassigns Medicare benefits to 2 organizations: Milford Regional Physician Group, Inc. (Milford, MA) and Umass Memorial Medical Group Inc (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 Carolyn O'brien's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Carolyn O'brien accept?

Health plans from Taro Health list Carolyn O'brien as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Carolyn O'brien affiliated with any hospitals?

According to CMS data, Carolyn O'brien is affiliated with Milford Regional Medical Center.

When was this NPI record last updated?

The NPPES record for Carolyn O'brien was last updated on August 28, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.