Dr. Christopher H. Hashikawa, MD
- Medicare services, 2024
- 439
- Medicare patients, 2024
- 327
- Part D claims, 2024
- 91
- Hospital affiliations
- 1
- Medical groups
- 3
- Practice address
- 57 Prospect Street, Nantucket, MA 02554
- Practice phone
- Call (508) 228-1200
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Christopher H. Hashikawa is an emergency medicine physician in Nantucket, Massachusetts
Dr. Hashikawa practices at Nantucket Cottage Hospital in Nantucket, Massachusetts, part of Mass General Brigham.
Dr. Hashikawa's NPI, 1770688160, was assigned on September 13, 2006. Dr. Hashikawa graduated from University of Michigan Medical School in 2004. Dr. Hashikawa holds Massachusetts license 230234.
- NPI
- 1770688160NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7214008291
- NPI enumeration date
- September 13, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (508) 228-1200
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 48
- Medical school graduation
- 2004
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Christopher H. Hashikawa practices at Nantucket Cottage Hospital in Nantucket, Massachusetts
Dr. Hashikawa's primary practice is Nantucket Cottage Hospital, at 57 Prospect Street, Nantucket, MA 02554 in Nantucket County. The practice phone is (508) 228-1200.
- Nantucket Cottage Hospital57 Prospect Street, Nantucket, MA 02554 · Nantucket CountyPhone(508) 228-1200
Source: Dmand AI Affiliation Data
Dr. Christopher H. Hashikawa is affiliated with 1 site of care and 3 medical groups
Dr. Hashikawa's primary practice is Nantucket Cottage Hospital in Nantucket, Massachusetts, part of Mass General Brigham. The medical group on file is Nantucket Cottage Hospital. Dmand AI also links Dr. Hashikawa to 2 more medical groups, each named with a free account. Dr. Hashikawa's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Christopher H. Hashikawa's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hashikawa practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Nantucket Cottage Hospital | Available with a free account |
| +2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Christopher H. Hashikawa is one of 1,483 emergency medicine physicians in Massachusetts
Emergency medicine is Dr. Hashikawa's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Hashikawa is licensed in Massachusetts.
Specialties and state licenses
- Emergency medicine, MassachusettsPrimary
Emergency medicine physicians near Dr. Hashikawa
Counts of emergency medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Christopher H. Hashikawa billed Medicare for 439 services in 2024
CMS data shows 439 Medicare services from Dr. Hashikawa across 5 procedure codes in 2024, for 327 Medicare patients. Medicare paid $26,188 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Hashikawa's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4302024: 23745%
- Tests and treatments
- 2023: 02024: 202
Dr. Hashikawa compared with the Massachusetts median for emergency medicine physicians, 2024
- Dr. Hashikawa
- Massachusetts median
- Medicare services
- 439vs 34129% above
- Medicare patients
- 327vs 337Close to median
- Part D claims
- 13vs 3664% below
Medians across 1,477 emergency medicine physicians in Massachusetts with Dmand AI profiles that report each measure.
Dr. Hashikawa's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Christopher H. Hashikawa treated 327 Medicare patients in 2024, average age 77
CMS counts 327 Medicare patients who saw Dr. Hashikawa in 2024. The largest group is 65 to 74, with 127 patients. 75% of them have high blood pressure, and 73% have high cholesterol. 13% are also on Medicaid. Their average risk score is 1.21, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Hashikawa's median patient age at 74, with 53% women.
Dr. Hashikawa's Medicare patients by age, 2024
Dr. Hashikawa's Medicare patients by sex, 2024
- Women18155%
- Men14645%
Chronic conditions among Dr. Hashikawa's Medicare patients, 2024
- High blood pressure75%
- High cholesterol73%
- Arthritis50%
- Ischemic heart disease36%
- Atrial fibrillation31%
- Anxiety27%
- Mood disorders26%
- Chronic kidney disease24%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hashikawa's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women53%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Christopher H. Hashikawa wrote 91 Medicare Part D claims in 2024
In 2024, Dr. Hashikawa wrote 91 Medicare Part D claims for 64 patients. 87% of them were for generic drugs. CMS names the drug for 13 of them, across 1 drug with 11 or more claims each, at $50 in total drug cost. In 2017, CMS named 11 claims across 1 drug.
Dr. Hashikawa's Part D claims by kind of drug, 2024
- Generic79 claims87%
- Brand-name12 claims13%
Dr. Hashikawa's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Hashikawa's Part D claims, 2024
- Antibiotics29%26 of 91 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2017 to 2024
- 2017
- 2024
- Claims for drugs CMS names
- 2017: 112024: 1318%
Drugs named by CMS: 1 in 2024, 1 in 2017.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Christopher H. Hashikawa takes part in Medicare
Dr. Hashikawa accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Christopher H. Hashikawa graduated from University of Michigan Medical School
Dr. Hashikawa graduated from University of Michigan Medical School in 2004.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Christopher H. Hashikawa's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Christopher H. Hashikawa
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Christopher H. Hashikawa's NPI number?
Dr. Christopher H. Hashikawa's NPI number is 1770688160. It was assigned on September 13, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Christopher H. Hashikawa?
Dr. Christopher H. Hashikawa is an emergency medicine physician in Nantucket, Massachusetts. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Christopher H. Hashikawa practice?
Dr. Hashikawa practices at 57 Prospect Street, Nantucket, MA 02554. Dr. Hashikawa's primary practice is Nantucket Cottage Hospital in Nantucket, Massachusetts, part of Mass General Brigham. Dmand AI also links Dr. Hashikawa to 2 medical groups.
What is Dr. Christopher H. Hashikawa's office phone number?
The practice phone on file for Dr. Hashikawa is (508) 228-1200.
What is Dr. Christopher H. Hashikawa's medical license number?
Dr. Hashikawa holds Massachusetts license 230234.
Which hospitals is Dr. Christopher H. Hashikawa affiliated with?
Dr. Hashikawa practices at Nantucket Cottage Hospital in Nantucket, Massachusetts.
What medical group is Dr. Christopher H. Hashikawa part of?
Dr. Hashikawa is linked to Nantucket Cottage Hospital. Dmand AI links Dr. Hashikawa to 2 more medical groups.
Does Dr. Christopher H. Hashikawa accept Medicare?
Yes. CMS data shows Dr. Hashikawa billed Medicare for 439 services in 2024, and Dr. Hashikawa accepts Medicare assignment.
How many Medicare patients does Dr. Christopher H. Hashikawa see?
CMS counts 327 Medicare patients who saw Dr. Hashikawa in 2024, with an average age of 77.
What services does Dr. Christopher H. Hashikawa bill to Medicare?
In 2024, Dr. Hashikawa's most billed Medicare services were heart test or procedure (93010), emergency department visit (99285) and emergency department visit (99284).
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Where did Dr. Christopher H. Hashikawa go to medical school?
Dr. Hashikawa graduated from University of Michigan Medical School in 2004.
What drugs does Dr. Christopher H. Hashikawa prescribe most?
In 2024 Medicare Part D data, Dr. Hashikawa's most prescribed drugs by claims were Ondansetron ODT.
How long has Dr. Christopher H. Hashikawa been practicing?
Dr. Hashikawa graduated from medical school in 2004, 22 years ago.
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