Kei Ouchi, MD, MPH
Emergency Medicine Physician · Boston, MA
Kei Ouchi, MD, MPH is an emergency medicine physician with a practice address in Boston, Massachusetts, and NPI 1346559630, issued on Oct 4, 2010. Check the license (Massachusetts 257977, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Kei Ouchi
- Credential
- MD, MPH
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 257977 MA
258871 NY
Self-reported in NPPES; status is on the state search - Practice location
- 75 Francis St, Boston, MA 02115
- Phone
- (617) 732-5640
- Enumerated
- Oct 4, 2010
- Record last updated
- Nov 18, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20140710000344); accepts Medicare assignment
- Medical or professional school
- Georgetown University School Of Medicine, 2009
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,829 in Massachusetts → Look up another NPI →
Also registered at 75 Francis St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Muhammad Abd-El-Barr, M.D., PH.D.Neurological Surgery Physician1891922688
- Duaa AbdelhameidStudent in an Organized Health Care Education/Training Program1851852867
Verify Kei Ouchi in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 257977Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average emergency medicine physician in 2024
22 Medicare Part D claims for 12 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
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 IncJamaica Plain, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kei Ouchi among 1,829 emergency medicine physician records in Massachusetts
Kei Ouchi, MD, MPH is one of 1,829 emergency medicine physician records with a practice address in Massachusetts. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 56% of them.
- NPI issued2010 · 56% of these records are older, 41% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2009 · median 2011 among the 1,200 with a school on file
- Record last updated2021 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
543 emergency medicine physician records list a practice address in Boston
They are 543 of the 41,865 NPPES records with a practice address in Boston, and 1,829 emergency medicine physician records in Massachusetts.
All 1,829 in Massachusetts → Every provider in Boston → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- J Stephen Bohan, MD MSBoston, MA 021151376509034
- Calvin Brown, MDBoston, MA 021151235129461
- Jennifer Chan, MD, MPHBoston, MA 021151750372785
- John Collins, MDBoston, MA 021151912976242
- Susan Farrell, MDBoston, MA 021151922064146
- Tania Fatovich, MDBoston, MA 021151407812688
- Paul Greenough, M.D.Boston, MA 021151902861180
- Stephanie Kayden, MD, MPHBoston, MA 021151629034954
Common questions
What is Kei Ouchi, MD, MPH's NPI number?
Kei Ouchi, MD, MPH's National Provider Identifier (NPI) is 1346559630, issued on Oct 4, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Kei Ouchi, MD, MPH located?
The NPPES record lists a practice address at 75 Francis St, Boston, MA, 02115. Phone: (617) 732-5640. Providers update this record themselves, so call before visiting.
How can I verify Kei Ouchi, MD, MPH's license?
NPPES lists Massachusetts license number 257977, 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 Kei Ouchi, MD, MPH prescribe under Medicare Part D?
In 2024, Kei Ouchi, MD, MPH had 22 Medicare Part D claims for 12 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.