Christopher H. Hashikawa, M.D.
Emergency Medicine Physician · Nantucket, MA
Christopher H. Hashikawa, M.D. is an emergency medicine physician with a practice address in Nantucket, Massachusetts, and NPI 1770688160, issued on Sep 13, 2006. Check the license (Massachusetts 230234, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Christopher H. Hashikawa
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 230234 MA
Self-reported in NPPES; status is on the state search - Practice location
- 57 Prospect St, Nantucket, MA 02554
- Phone
- (508) 825-8100
- Enumerated
- Sep 13, 2006
- Record last updated
- Nov 16, 2023
- Medicare enrollment
- Enrolled (PECOS I20080618000746); accepts Medicare assignment
- Medical or professional school
- University Of Michigan Medical School, 2004
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,829 in Massachusetts → Look up another NPI →
Also registered at 57 Prospect St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Annette Adams, CNPAdult Health Nurse Practitioner1164877635
- Annette Bell-Thompson, NPFamily Nurse Practitioner1265366371
- Candy Bernier, FNP-BCFamily Nurse Practitioner1376020099
- George Butterworth, MDFamily Medicine Physician1710993589
- Eileen Carlsen, NPFamily Nurse Practitioner1467514661
- Allison Dao, NURSE PRACTITIONERFamily Nurse Practitioner1689885485
Verify Christopher H. Hashikawa in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 230234Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
60% fewer Medicare Part D claims than the average emergency medicine physician in 2024
91 Medicare Part D claims for 64 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Ondansetron Odt13 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.
One hospital affiliation
- Nantucket Cottage HospitalNantucket, MA · Acute Care Hospitals3 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Christopher H. Hashikawa among 1,829 emergency medicine physician records in Massachusetts
Christopher H. Hashikawa, M.D. 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 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 59% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2004 · median 2011 among the 1,200 with a school on file
- Record last updated2023 · 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).
7 emergency medicine physician records list a practice address in Nantucket
They are 7 of the 198 NPPES records with a practice address in Nantucket, and 1,829 emergency medicine physician records in Massachusetts.
All 1,829 in Massachusetts → Every provider in Nantucket → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Janine Albert, M.D.Nantucket, MA 025541629395991
- Tamara Dildy, MDNantucket, MA 025541306804000
- Lisa Flaherty, D.ONantucket, MA 025541649490400
- Margot Hartmann, MD, PHDNantucket, MA 025541871556175
- Michael Hudson, MDNantucket, MA 025541659399293
- Wendell Jones, MDNantucket, MA 025541407095680
- Karen Casper, M.D.Oak Bluffs, MA 025571962518738
- Jeffrey Horenstein, M.D., PH.D.Oak Bluffs, MA 025571073834081
Common questions
What is Christopher H. Hashikawa, M.D.'s NPI number?
Christopher H. Hashikawa, M.D.'s National Provider Identifier (NPI) is 1770688160, issued on Sep 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Christopher H. Hashikawa, M.D. located?
The NPPES record lists a practice address at 57 Prospect St, Nantucket, MA, 02554. Phone: (508) 825-8100. Providers update this record themselves, so call before visiting.
How can I verify Christopher H. Hashikawa, M.D.'s license?
NPPES lists Massachusetts license number 230234, 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 Christopher H. Hashikawa, M.D. prescribe under Medicare Part D?
In 2024, Christopher H. Hashikawa, M.D. had 91 Medicare Part D claims for 64 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.