Arthur Seiji Hayashi, MD
Family Medicine Physician · Washington, DC
Arthur Seiji Hayashi, MD is a family medicine physician with a practice address in Washington, District of Columbia, and NPI 1912069055, issued on Dec 14, 2006. Check the license (District of Columbia MD33159, as entered in NPPES) on the District of Columbia Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Arthur Seiji Hayashi
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- MD33159 DC
Self-reported in NPPES; status is on the state search - Practice location
- 1220 12TH St SE, Washington, DC 20003
- Phone
- (202) 715-7900
- Enumerated
- Dec 14, 2006
- Record last updated
- Aug 6, 2015 (not updated in 11 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20151014001204); accepts Medicare assignment
- Medical or professional school
- Albert Einstein College Of Medicine Of Yeshiva University, 1997
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 350 in District of Columbia → Look up another NPI →
Also registered at 1220 12TH St SE
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Oyetumilara Abimbola-PetersHome Health Aide1902306871
- Evette AdietCase Manager/Care Coordinator1578231668
- Cheikhna Aidara, PA-CPhysician Assistant1336439967
- Kathy AlstonEmergency Medicine Physician1366584153
- Abdul AmaraStudent in an Organized Health Care Education/Training Program1083229603
- Monsurat AshiruCase Manager/Care Coordinator1285101576
Verify Arthur Seiji Hayashi in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersDistrict of Columbia Board of Medicine
Search for license MD33159Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average family medicine physician in 2024
22 Medicare Part D claims, against an average of 3,544 among the 117,163 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
- Marys Center For Maternal And Child Care IncAdelphi, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Arthur Seiji Hayashi among 350 family medicine physician records in District of Columbia
Arthur Seiji Hayashi, MD is one of 350 family medicine physician records with a practice address in District of Columbia. 63% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 69% newer
- In a Medicare fileYes · 63% of these records are
- In the CMS Doctors and Clinicians fileYes · 52% of these records are
- Graduated1997 · median 2012 among the 182 with a school on file
- Record last updated2015 · 56% 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 District of Columbia 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 District of Columbia
There are 350 family medicine physician records in District of Columbia.
All 350 in District of Columbia → Every provider in Washington → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Kimball Beck, MDWashington, DC 200031497819379
- Anthony Flood, M.D.Washington, DC 200031083879035
- Liam Gaugh, DOWashington, DC 200031174143564
- Seoyoon HaWashington, DC 200031497582142
- Paulos Kidane, M.D.Washington, DC 200031184841587
- Darlene LawrenceWashington, DC 200031336185982
- Syeda MansurWashington, DC 200031467848614
- Meghane Masquelin, DOWashington, DC 200031730641176
Common questions
What is Arthur Seiji Hayashi, MD's NPI number?
Arthur Seiji Hayashi, MD's National Provider Identifier (NPI) is 1912069055, issued on Dec 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Arthur Seiji Hayashi, MD located?
The NPPES record lists a practice address at 1220 12TH St SE, Washington, DC, 20003. Phone: (202) 715-7900. Providers update this record themselves, so call before visiting.
How can I verify Arthur Seiji Hayashi, MD's license?
NPPES lists District of Columbia license number MD33159, as entered by the provider. Search the District of Columbia Board of Medicine at https://dchealth.dc.gov/bomed. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Arthur Seiji Hayashi, MD prescribe under Medicare Part D?
In 2024, Arthur Seiji Hayashi, MD had 22 Medicare Part D claims; the average among family medicine physician prescribers was 3,544. 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.