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KRISTIN CASTILLO FARIAS M.D.
NPI 1851658231
Internal Medicine in Brookline, MA

Active since April 23, 2012PECOS EnrolledAccepts Medicare Assignment
1285 BEACON ST STE 101, BROOKLINE, MA 02446(617) 983-7025(857) 307-4141 Get Directions Write a Review

NPPES record last updated: October 17, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jun 20, 2019, Mar 3, 2018, Nov 22, 2016 (3 updates tracked since 2016).

About Kristin Castillo Farias M.d. NPPES

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

KRISTIN CASTILLO FARIAS M.D. (NPI 1851658231) is an individual internal medicine provider in Brookline, Massachusetts, licensed in Massachusetts (261528) and active in the NPI registry since April 2012. She is enrolled in Medicare PECOS, is affiliated with Newton-wellesley Hospital, and is a graduate of Harvard Medical School (2012).

NPPES Registry Identity

NPI1851658231
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameKRISTIN CASTILLO FARIASCredential: M.D.
Location Address1285 BEACON ST STE 101Brookline, MA 02446-5237
Mailing Address75 Francis StBoston, MA 02115-6106 · (617) 983-7025 · Fax (857) 307-4141
Phone(617) 983-7025
Fax(857) 307-4141
Sole ProprietorYes
Medical School CMSHarvard Medical SchoolGraduated 2012
Enumeration DateApril 23, 2012
Last NPPES UpdateOctober 17, 20243 updates tracked since enumeration
NPPES CertifiedOctober 17, 2024
✔ NPI 1851658231 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Licenses✔ Licensed in MA · 261528✔ Licensed in FL · ME133787
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedPediatricsTaxonomy 208000000X · License 261528 (MA), ME133787 (FL)
1285 BEACON ST STE 101, Brookline, MA 02446
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Other Identifiers 1

Medicaid023257900FL

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

Kristin Castillo Farias M.d. 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 ID941443576
PECOS Enrollment IDI20161207000903
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 Kristin Farias reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Brigham & Womens Physicians Organization Inc
0.7 mi
Internal Medicine
75 FRANCIS ST
Boston, MA 02115
  • Reassigned Medicare billing, Massachusetts enrollment
  • 4,574 clinicians in this Medicare group
NPI 1033535497 (617) 732-5500
Orlando Health Medical Group Inc
1,113 mi
Internal Medicine
52 W UNDERWOOD ST
Orlando, FL 32806
  • Reassigned Medicare billing, Florida enrollment
  • 3,290 clinicians in this Medicare group
NPI 1669429577 (321) 841-2452

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 2

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 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.
32 services25 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
13 services13 patients

Hospital Affiliations CMS Care Compare 3

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

Newton-Wellesley Hospital

Acute Care Hospitals · Newton, MA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220101
Location2014 Washington StreetNewton, MA 02462 · Middlesex County
Emergency services Birthing friendly

Brigham And Women's Hospital

Acute Care Hospitals · Boston, MA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220110
Location75 Francis StreetBoston, MA 02115 · Suffolk County
Emergency services Birthing friendly

Faulkner Hospital-Brigham And Women's

Acute Care Hospitals · Boston, MA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220119
Location1153 Centre StreetBoston, MA 02130 · Suffolk County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02446 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
$144.11 typical visit price
range $63.72 – $189.86
Typical copayment $36.02 (range $15.93 – $47.46)
Most-billed visit code 99204
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.

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 Kristin Farias's NPI number?

The NPI number for Kristin Farias is 1851658231. It was assigned to this individual provider in the NPPES registry on April 23, 2012.

Where is Kristin Farias located?

Kristin Farias practices at 1285 Beacon St Ste 101, Brookline, MA 02446. The listed phone number is (617) 983-7025.

What is Kristin Farias's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Kristin Farias enrolled in Medicare?

Yes. Kristin Farias 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 Kristin Farias's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Kristin Farias reassigns Medicare benefits to 2 organizations: Brigham & Womens Physicians Organization Inc (Boston, MA) and Orlando Health Medical Group Inc (Orlando, FL). 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 Kristin Farias's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Kristin Farias accept?

Health plans from Taro Health list Kristin Farias 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 Kristin Farias affiliated with any hospitals?

According to CMS data, Kristin Farias is affiliated with Newton-Wellesley Hospital, Brigham And Women's Hospital and Faulkner Hospital-Brigham And Women's.

When was this NPI record last updated?

The NPPES record for Kristin Farias was last updated on October 17, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years 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.