OSAMU SAKAI M.D.
NPI 1770550956
Radiology - Neuroradiology in Boston, MA

Q: What is Osamu Sakai's NPI number?

The NPI number for Osamu Sakai is 1770550956. It was assigned to this individual provider in the NPPES registry on March 7, 2006.

Q: What is Osamu Sakai's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Neuroradiology, with taxonomy code 2085N0700X.

Q: When was this NPI record last updated?

The NPPES record for Osamu Sakai was last updated on July 10, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since March 07, 2006PECOS EnrolledAccepts Medicare Assignment

88 E NEWTON ST, DEPT RADIOLOGY, BOSTON, MA 02118(617) 638-6610(617) 638-6616 Get Directions Write a Review

NPPES record last updated: July 10, 2014. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Osamu Sakai M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

OSAMU SAKAI M.D. (NPI 1770550956) is an individual neuroradiology provider in Boston, Massachusetts, licensed in Massachusetts (219618) and active in the NPI registry since March 2006. He is enrolled in Medicare PECOS, is affiliated with North Shore Medical Center -, and is a graduate of Other (1988).

NPPES Registry Identity

NPI1770550956

Entity TypeIndividualMale

Primary Taxonomy2085N0700X

Provider Legal NameOSAMU SAKAICredential: M.D.

Location Address88 E NEWTON ST, DEPT RADIOLOGYBoston, MA 02118-2308

Mailing Address720 Harrison Ave, Dob 503Boston, MA 02118-2371

Phone(617) 638-6610

Fax(617) 638-6616

Sole ProprietorNo

Medical School CMSOtherGraduated 1988

Enumeration DateMarch 7, 2006

Last NPPES UpdateJuly 10, 2014

✔ NPI 1770550956 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyRadiology · NeuroradiologyAllopathic & Osteopathic Physicians

Taxonomy Code2085N0700X

License✔ Licensed in MA · 219618

Definition

A radiologist who diagnoses and treats diseases utilizing imaging procedures as they relate to the brain, spine and spinal cord, head, neck and organs of special sense in adults and children.

Also ListedRadiology · Diagnostic RadiologyTaxonomy 2085R0202X · License 219618 (MA)

88 E NEWTON ST, Boston, MA 02118

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Other Identifiers 2

Medicare PINFX9882MA

Medicaid110035467AMA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Taro Health, WellSense Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Osamu Sakai M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2668363128

PECOS Enrollment IDI20040323001465, I20260701004109

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Osamu Sakai reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Boston University Medical Center Radiologists, Inc.

0.2 mi

Diagnostic Radiology

840 HARRISON AVE
Boston, MA 02118

Reassigned Medicare billing, Massachusetts enrollment
84 clinicians in this Medicare group

NPI 1134166945 (617) 638-6610

The General Hospital Corporation

1.8 mi

General Acute Care Hospital

55 FRUIT ST, BULFINCH 360
Boston, MA 02114

Reassigned Medicare billing, Massachusetts enrollment
6,234 clinicians in this Medicare group

NPI 1023049236 (617) 726-2000

Massachusetts General Physicians Organization Inc

1.8 mi

Dermatology

55 FRUIT ST, BUL 2
Boston, MA 02114

Reassigned Medicare billing, Massachusetts and New Hampshire enrollments
6,360 clinicians in this Medicare group

NPI 1801874573 (617) 724-0287

Internal Medical Associates-Ebnhc

3.0 mi

Community Health

10 GOVE ST
East Boston, MA 02128

Reassigned Medicare billing, Massachusetts enrollment
577 clinicians in this Medicare group

NPI 1558481879 (617) 569-5800

Neighborhealth Corporation

3.0 mi

Community Health

10 GOVE ST
East Boston, MA 02128

Reassigned Medicare billing, Massachusetts enrollment
Medicare enrollment name: East Boston Neighborhood Health Center Corp
456 clinicians in this Medicare group

NPI 1316994411 (617) 569-5800

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 26

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Injection, gadoterate meglumine, 0.1 ml A9575

Gadoterate meglumine is a contrast agent used in MRI scans to help visualize certain areas of your body more clearly. It's injected into your bloodstream, typically through a vein in your arm, and helps doctors get more detailed images.

2,380 services15 patients

Ct scan head or brain without contrast 70450

A CT scan of the head or brain without contrast is a non-invasive imaging procedure. It uses X-rays to create detailed pictures of your brain, skull, and other structures inside your head. It helps to detect conditions like strokes, tumors, or injuries. No dye (contrast) is used in this test.

180 services175 patients

Ct scan of soft tissue of neck with contrast 70491

A CT scan of the neck with contrast is a non-invasive imaging procedure. A special dye is administered to highlight the soft tissues in your neck, making them easier to see. This helps detect issues like infections, tumors, or other abnormalities.

137 services132 patients

Mri scan of brain before and after contrast 70553

An MRI scan of the brain, both before and after contrast, helps visualize different brain structures. Initially, images are taken without a contrast agent. Then, a safe dye is injected which helps highlight certain areas, providing clearer, more detailed images.

127 services126 patients

Mri scan of brain before and after contrast 70553

118 services117 patients

Ct scan of soft tissue of neck with contrast 70491

82 services75 patients

Mri scan of brain without contrast 70551

An MRI scan of the brain without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed images of your brain. It helps in detecting abnormalities like tumors, stroke, inflammation, or infection.

69 services69 patients

Imaging for evaluation of swallowing function 74230

This process, known as a swallowing study, uses imaging technology to view how food and liquid move from your mouth to your stomach. It helps identify any issues you may have swallowing, which can be crucial for determining the best treatment plan.

57 services57 patients

Ct scan of face without contrast 70486

A CT scan of the face without contrast is a non-invasive imaging procedure. It uses X-rays to create detailed pictures of your face, including bones, soft tissues, and blood vessels. It's often used to diagnose diseases, injuries, or abnormalities. No contrast dye is used in this procedure.

51 services51 patients

Ct scan of blood vessels of head with contrast 70496

A CT scan of the head's blood vessels with contrast is a diagnostic procedure. A special dye (contrast) is injected into your body to make the blood vessels visible on the scan. This helps identify issues like blockages or abnormalities in your head's blood vessels.

48 services48 patients

Ct scan of blood vessels of neck with contrast 70498

A CT scan of the neck's blood vessels with contrast is a diagnostic procedure. It uses X-rays and a special dye to create detailed images of your neck's blood vessels. This helps doctors detect issues such as blockages or abnormalities.

45 services45 patients

Ct scan of face without contrast 70486

42 services41 patients

Mri scan of brain without contrast 70551

36 services36 patients

Ct scan head or brain without contrast 70450

35 services35 patients

Mri scan of bone of eye socket, face, and/or neck before and after contrast 70543

An MRI scan of the eye socket, face, and/or neck uses magnetic fields to create detailed images of these areas. Contrast dye helps highlight specific tissues for clearer pictures. It's non-invasive, aids in detecting abnormalities, and guides treatment plans.

34 services34 patients

Mri scan of lower spinal canal without contrast 72148

An MRI scan of the lower spinal canal without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to produce detailed images of your lower spine. This helps identify issues like disc problems, tumors, or nerve conditions. No dye is used.

28 services27 patients

Mri scan of lower spinal canal without contrast 72148

25 services25 patients

Mri scan of blood vessels of head without contrast 70544

An MRI scan of the head's blood vessels without contrast is a non-invasive imaging procedure. It uses a magnetic field and radio waves to create detailed images of the blood vessels in your head. This helps doctors diagnose conditions such as stroke, aneurysm, or other vascular disorders.

24 services24 patients

Ct scan of cranial cavity without contrast 70480

A CT scan of the cranial cavity without contrast is a non-invasive imaging procedure. It uses X-rays to create detailed images of your head, specifically the brain area. This can help detect conditions like tumors, infections, or injuries. No dye (contrast) is used in this procedure.

23 services23 patients

Ct scan of chest with contrast 71260

A CT scan of the chest with contrast is an imaging procedure. A special dye (contrast) is used to highlight specific areas in your body, providing clearer pictures of your chest. This helps in diagnosing conditions related to your lungs, heart, and other chest structures.

23 services23 patients

Ct scan of soft tissue of neck without contrast 70490

A CT scan of the neck's soft tissue without contrast is a non-invasive imaging technique. It uses X-rays to create detailed pictures of your neck area, helping to identify issues like infections, injuries, or tumors. No special dye (contrast) is used in this procedure.

20 services20 patients

Mri scan of bone of eye socket, face, and/or neck before and after contrast 70543

20 services20 patients

Ct scan of soft tissue of neck before and after contrast 70492

A CT scan of the neck's soft tissue uses special X-ray equipment to create detailed pictures of your neck's structures. Contrast dye is injected to make certain areas more visible. It helps in diagnosing conditions like infections, tumors, or injuries.

19 services19 patients

Mri scan of upper spinal canal without contrast 72141

An MRI scan of the upper spinal canal without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed images of your upper spine. This helps doctors identify issues such as injuries, infections or diseases. No dye is used.

15 services15 patients

Ct scan of soft tissue of neck before and after contrast 70492

13 services13 patients

Single contrast x-ray of esophagus 74220

A single contrast x-ray of the esophagus is a non-invasive procedure where a radiopaque substance is swallowed to highlight the esophagus. This allows doctors to capture clear images of the area, aiding in the diagnosis of any abnormalities or issues.

13 services13 patients

Hospital Affiliations CMS Care Compare 5

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

North Shore Medical Center -

Acute Care Hospitals · Salem, MA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220035

Location81 Highland AvenueSalem, MA 01970 · Essex County

Emergency services Birthing friendly

Massachusetts General Hospital

Acute Care Hospitals · Boston, MA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220071

Location55 Fruit StreetBoston, MA 02114 · Suffolk County

Emergency services Birthing friendly

Massachusetts Eye And Ear Infirmary -

Acute Care Hospitals · Boston, MA

OwnershipVoluntary non-profit - Private

CMS Certification Number220075

Location243 Charles StreetBoston, MA 02114 · Suffolk County

Emergency services

Brigham And Women's Hospital

Acute Care Hospitals · Boston, MA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220110

Location75 Francis StreetBoston, MA 02115 · Suffolk County

Emergency services Birthing friendly

Martha's Vineyard Hospital Inc

Critical Access Hospitals · Oak Bluffs, MA

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number221300

LocationOne Hospital Road, First Fl, Wing 5, PO Box 1477Oak Bluffs, MA 02557 · Dukes County

Emergency services Birthing friendly

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

STEPHANIE L REDMOND PA-C

Physician Assistant

88 E NEWTON ST
BOSTON, MA 02118

Suffolk County (617) 638-8413

TRUSTEES OF BOSTON UNIVERSITY

Dentist (Oral and Maxillofacial Surgery)

88 E NEWTON ST
BOSTON, MA 02118

Suffolk County (866) 390-1815

INDEPENDENCE RADIOLOGY ASSOCIATES, PC

Radiology (Diagnostic Radiology)

88 E NEWTON ST
BOSTON, MA 02118

Suffolk County (617) 638-6610

YE M TUN M.D

Internal Medicine (Nephrology)

88 E NEWTON ST, BOSTON MEDICAL CENTER
BOSTON, MA 02118

Suffolk County (617) 638-7322

ALEXANDER MARK DEKEL M.D.

Anesthesiology

88 E NEWTON ST, ROOM 2817A
BOSTON, MA 02118

Suffolk County (617) 638-6975

BOSTON UNIVERSITY CARDIAC & THORACIC SURGICAL FOUNDATION, INC.

General Acute Care Hospital

88 E NEWTON ST, ROBINSON B402
BOSTON, MA 02118

Suffolk County (617) 638-7350

DR. PAVAN M SEKHAR MD

Anesthesiology

88 E NEWTON ST
BOSTON, MA 02118

Suffolk County (617) 638-8000

DR. LINDSAY ARNOLD PHARM D

Pharmacist (Pharmacotherapy)

88 E NEWTON ST, DEPARTMENT OF PHARMACY H2606
BOSTON, MA 02118

Suffolk County (617) 638-7598

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Osamu Sakai's NPI number?

The NPI number for Osamu Sakai is 1770550956. It was assigned to this individual provider in the NPPES registry on March 7, 2006.

Where is Osamu Sakai located?

Osamu Sakai practices at 88 E Newton St Dept Radiology, Boston, MA 02118. The listed phone number is (617) 638-6610.

What is Osamu Sakai's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Neuroradiology, with taxonomy code 2085N0700X.

Is Osamu Sakai enrolled in Medicare?

Yes. Osamu Sakai is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Osamu Sakai's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Osamu Sakai reassigns Medicare benefits to 5 organizations: Boston University Medical Center Radiologists, Inc. (Boston, MA), The General Hospital Corporation (Boston, MA), Massachusetts General Physicians Organization Inc (Boston, MA), Internal Medical Associates-Ebnhc (East Boston, MA) and Neighborhealth Corporation (East Boston, MA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Osamu Sakai's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Osamu Sakai accept?

Health plans from Taro Health and WellSense Health Plan list Osamu Sakai as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Osamu Sakai affiliated with any hospitals?

According to CMS data, Osamu Sakai is affiliated with North Shore Medical Center -, Massachusetts General Hospital, Massachusetts Eye And Ear Infirmary -, Brigham And Women's Hospital and Martha's Vineyard Hospital Inc.

When was this NPI record last updated?

The NPPES record for Osamu Sakai was last updated on July 10, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.