Kristen A. Obrien, M.D.
Family Medicine Physician · Smithtown, NY
Kristen A. Obrien, M.D. is a family medicine physician with a practice address in Smithtown, New York, and NPI 1811922529, issued on Jul 11, 2006. Check the license (New York 231689, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Kristen A. Obrien
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 231689 NY
Self-reported in NPPES; status is on the state search - Practice location
- 9 Brooksite Dr, Smithtown, NY 11787
- Phone
- (631) 724-1331
- Enumerated
- Jul 11, 2006
- Record last updated
- May 2, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (631) 360-5646
- Medicaid ID
- 02639114 NY
- Medicare enrollment
- Enrolled (PECOS I20041209000747); accepts Medicare assignment
- Medical or professional school
- State University Of New York At Buffalo School Of Medicine, 2001
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 6,417 in New York → Look up another NPI →
Also registered at 9 Brooksite Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alfred Belding, M.D.Family Medicine Physician1164457958
- Kevin Dolley, N.P.Legal Medicine1134133671
- James Dragone, M.D.Family Medicine Physician1982639670
- Regina Fletcher, LCSWClinical Social Worker1679692289
- John Franco, M.D.Family Medicine Physician1932134624
- Francis Xavier Gleason, M.D.Family Medicine Physician1396770459
Verify Kristen A. Obrien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 231689Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
21% more Medicare Part D claims than the average family medicine physician in 2024
4,305 Medicare Part D claims for 491 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 31 claims were for opioids.
Most prescribed
- Atorvastatin Calcium291 claims
- Amlodipine Besylate209 claims
- Rosuvastatin Calcium173 claims
- Levothyroxine Sodium159 claims
- Zolpidem Tartrate146 claims
- Fluticasone Propionate135 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.
The MIPS final score for 2023 (Medicare payment program): 91.3 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Harbor View Medical Services PCEast Setauket, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kristen A. Obrien among 6,417 family medicine physician records in New York
Kristen A. Obrien, M.D. is one of 6,417 family medicine physician records with a practice address in New York. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 58% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated2001 · median 2007 among the 4,188 with a school on file
- Record last updated2008 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Family Medicine Physician providers in New York
There are 6,417 family medicine physician records in New York.
All 6,417 in New York → Every provider in Smithtown → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Alfred Belding, M.D.Smithtown, NY 117871164457958
- Paul Cohen, D.O., DABFM, FAAFPSmithtown, NY 117871588751861
- James Dragone, M.D.Smithtown, NY 117871982639670
- John Franco, M.D.Smithtown, NY 117871932134624
- Francis Xavier Gleason, M.D.Smithtown, NY 117871396770459
- Superio Jao, MDSmithtown, NY 117871407969819
- Anna Kapsalis Rambalakos, MDSmithtown, NY 117871093985574
- Nicholas LivrieriSmithtown, NY 117871669578985
Common questions
What is Kristen A. Obrien, M.D.'s NPI number?
Kristen A. Obrien, M.D.'s National Provider Identifier (NPI) is 1811922529, issued on Jul 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Kristen A. Obrien, M.D. located?
The NPPES record lists a practice address at 9 Brooksite Dr, Smithtown, NY, 11787. Phone: (631) 724-1331. Providers update this record themselves, so call before visiting.
How can I verify Kristen A. Obrien, M.D.'s license?
NPPES lists New York license number 231689, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Kristen A. Obrien, M.D. prescribe under Medicare Part D?
In 2024, Kristen A. Obrien, M.D. had 4,305 Medicare Part D claims for 491 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Kristen A. Obrien, M.D.'s MIPS final score?
The 2023 MIPS final score is 91.3 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.