CHRISTOPHER H HASHIKAWA (M.D.) – Emergency Medicine Physician, NPI 1770688160
Emergency Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,682 EMERGENCY MEDICINE in MA
Provider Addresses for CHRISTOPHER H HASHIKAWA (M.D.)
57 PROSPECT ST
NANTUCKET, MA 02554
Phone: (508) 825-8100
Type: Mailing
Brigham and Women's Hospital, 75, Francis Street, Roxbury, Boston, Suffolk County, Massachusetts, 02115, United States
75 FRANCIS STREET - NEVILLE HOUSE
BOSTON, MA 021156110
Phone: (617) 732-8070
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2008-06-18
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20080618000746 | I | Emergency Medicine | MA | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99285 | Emergency department visit with high level of medical decision making | 268 | 262 | $0 |
| 99292 | Critical care, each additional 30 minutes | 63 | 23 | $0 |
| 99291 | Critical care, first 30-74 minutes | 59 | 58 | $0 |
| 99284 | Emergency department visit with moderate level of medical decision making | 40 | 40 | $0 |
Insurance plans in this area (ZIP 02554)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | RI | |
| Endocrinology, Internal Medicine | MA | |
| Family Practice | RI | |
| O B S T E T R I C S/ G Y N E C O L O G Y | MA | |
| Family Practice, Emergency Medicine, Hospitalist | MI | |
| Physician Assistant | MA | |
| Emergency Medicine | MA | |
| Nurse Practitioner | MA | |
| Nurse Practitioner | PA | |
| O B S T E T R I C S/ G Y N E C O L O G Y | MA |
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