Kristin Castillo Farias, M.D.
Internal Medicine Physician · Brookline, MA
Kristin Castillo Farias, M.D. is an internal medicine physician with a practice address in Brookline, Massachusetts, and NPI 1851658231, issued on Apr 23, 2012. Check the license (Massachusetts 261528, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Kristin Castillo Farias
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 261528 MA
ME133787 FL
Self-reported in NPPES; status is on the state search - Practice location
- 1285 Beacon St Ste 101, Brookline, MA 02446
- Phone
- (617) 983-7025
- Enumerated
- Apr 23, 2012
- Record last updated
- Oct 17, 2024
- Fax
- (857) 307-4141
- Medicaid ID
- 023257900 FL
- Medicare enrollment
- Enrolled (PECOS I20161207000903); accepts Medicare assignment
- Medical or professional school
- Harvard Medical School, 2012
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Verify Kristin Castillo Farias in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 261528Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average internal medicine physician in 2024
246 Medicare Part D claims for 46 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Rosuvastatin Calcium23 claims
- Amlodipine Besylate21 claims
- Atorvastatin Calcium18 claims
- Lisinopril15 claims
- Trazodone Hcl14 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.
Bills Medicare through one group practice
- Brigham And Womens Physicians Organization IncBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kristin Castillo Farias among 6,825 internal medicine physician records in Massachusetts
Kristin Castillo Farias, M.D. is one of 6,825 internal medicine physician records with a practice address in Massachusetts. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 67% of them.
- NPI issued2012 · 67% of these records are older, 30% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2012 · median 2004 among the 4,103 with a school on file
- Record last updated2024 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
57 internal medicine physician records list a practice address in Brookline
They are 57 of the 2,357 NPPES records with a practice address in Brookline, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Brookline → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Paul Blando, M.D.Brookline, MA 024461063451862
- Richard Brodie, M.D.Brookline, MA 024461912900473
- Jayson Carr, M.D.Brookline, MA 024461780611798
- William Goldberg, M.D.Brookline, MA 024461558336180
- Parnag Kasarjian, M.D.Brookline, MA 024461114966207
- Cyrus Komer, MDBrookline, MA 024461184602302
- R Roger Komer, M.D.Brookline, MA 024461235178237
- Hua Lu, MD PHDBrookline, MA 024461043288749
Common questions
What is Kristin Castillo Farias, M.D.'s NPI number?
Kristin Castillo Farias, M.D.'s National Provider Identifier (NPI) is 1851658231, issued on Apr 23, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Kristin Castillo Farias, M.D. located?
The NPPES record lists a practice address at 1285 Beacon St Ste 101, Brookline, MA, 02446. Phone: (617) 983-7025. Providers update this record themselves, so call before visiting.
How can I verify Kristin Castillo Farias, M.D.'s license?
NPPES lists Massachusetts license number 261528, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Kristin Castillo Farias, M.D. prescribe under Medicare Part D?
In 2024, Kristin Castillo Farias, M.D. had 246 Medicare Part D claims for 46 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.