DR. THOMAS FLOOD M.D., PH.D.
NPI 1093155541
Radiology - Diagnostic Radiology in Boston, MA

Q: What is Thomas Flood's NPI number?

The NPI number for Thomas Flood is 1093155541. It was assigned to this individual provider in the NPPES registry on June 28, 2013.

Q: What is Thomas Flood's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Q: When was this NPI record last updated?

The NPPES record for Thomas Flood was last updated on July 28, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months 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 June 28, 2013PECOS EnrolledAccepts Medicare Assignment

55 FRUIT ST # 210, BOSTON, MA 02114(617) 724-7168 Get Directions Write a Review

NPPES record last updated: July 28, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 28, 2026, Mar 19, 2018 (2 updates tracked since 2018).

On this page

About Dr. Thomas Flood M.d., Ph.d. NPPES

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

DR. THOMAS FLOOD M.D., PH.D. (NPI 1093155541) is an individual diagnostic radiology provider in Boston, Massachusetts, licensed in Massachusetts (273596) and active in the NPI registry since June 2013. He is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1093155541

Entity TypeIndividualMale

Primary Taxonomy2085R0202X

Provider Legal NameDR. THOMAS FLOODCredential: M.D., PH.D.

Location Address55 FRUIT ST # 210Boston, MA 02114-2621

Mailing Address55 Fruit StBoston, MA 02114-2696 · (617) 726-2000

Phone(617) 724-7168

Sole ProprietorYes

Medical School CMSUniversity Of Massachusetts Medical SchoolGraduated 2013

Enumeration DateJune 28, 2013

Last NPPES UpdateJuly 28, 20262 updates tracked since enumeration

NPPES CertifiedJuly 28, 2026

✔ NPI 1093155541 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians

Taxonomy Code2085R0202X

License✔ Licensed in MA · 273596

Definition

A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.

Also ListedInternal MedicineTaxonomy 207R00000X · License 256996 (MA)

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X · License TL0005039 (CO)

55 FRUIT ST # 210, Boston, MA 02114

Open in Google Maps ↗

Secondary Practice Locations 2

Location 11635 Aurora CtAurora, CO 80045-2541 · Phone (978) 866-4668

Location 275 Francis StBoston, MA 02115-6110 · Phone (617) 732-5500

Accepted Insurance

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

Dr. Thomas Flood M.d., Ph.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 ID1456615699

PECOS Enrollment IDI20180516000133

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 Thomas Flood reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Massachusetts General Physicians Organization Inc

Same address

Dermatology

55 FRUIT ST, BUL 2
Boston, MA 02114

Reassigned Medicare billing, Massachusetts enrollment
6,360 clinicians in this Medicare group

NPI 1801874573 (617) 724-0287

The General Hospital Corporation

Same address

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

Brigham & Womens Physicians Organization Inc

2.7 mi

Internal Medicine

75 FRANCIS ST
Boston, MA 02115

Reassigned Medicare billing, Massachusetts enrollment
4,574 clinicians in this Medicare group

NPI 1033535497 (617) 732-5500

The Mclean Hospital Corporation

6.6 mi

Psychiatry

115 MILL ST
Belmont, MA 02478

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

NPI 1114979580 (617) 855-2183

Mass General Brigham Medical Group Suburban Massachusetts Inc

9.4 mi

Family Medicine

2014 WASHINGTON STREET
Newton, MA 02462

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

NPI 1538191218 (617) 243-6262

Harbor Medical Associates, Inc.

13 mi

Cardiovascular Disease

541 MAIN ST, SUITE 400
South Weymouth, MA 02190

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

NPI 1124079561 (781) 952-1240

Cooley Dickinson Hospital Inc

81 mi

General Acute Care Hospital

30 LOCUST ST
Northampton, MA 01060

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

NPI 1477596310 (413) 582-2000

Mass General Brigham Medical Group Western Massachusetts Inc

81 mi

Family Medicine

30 LOCUST ST
Northampton, MA 01060

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

NPI 1295787919 (413) 582-2898

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 31

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, gadobutrol, 0.1 ml A9585

Gadobutrol is a contrast agent used during MRI scans to help provide clearer images. It's injected into your vein before the scan. This helps doctors to see certain areas more clearly for better diagnosis. It's generally safe with few side effects.

2,674 services33 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.

374 services363 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.

258 services233 patients

Mri scan of brain before and after contrast 70553

122 services121 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.

109 services105 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.

105 services103 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.

62 services60 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.

57 services57 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.

56 services56 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.

50 services49 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.

47 services46 patients

Mri scan of lower spinal canal without contrast 72148

47 services47 patients

Mri scan of lower spinal canal before and after contrast 72158

An MRI scan of the lower spinal canal with contrast is a non-invasive imaging procedure. It uses magnetic fields to generate detailed images of your lower spine. A contrast agent is injected to enhance these images, helping doctors see issues more clearly.

46 services44 patients

Mri scan of brain without contrast 70551

45 services45 patients

Mri scan of middle spinal canal before and after contrast 72157

An MRI scan of the middle spinal canal with contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed images of your spine, both before and after a contrast dye is injected. The dye helps to highlight certain structures, providing a clearer picture for diagnosis.

43 services42 patients

Mri scan of upper spinal canal before and after contrast 72156

An MRI scan of the upper spinal canal before and after contrast is a non-invasive imaging test. It uses magnetic fields and radio waves to create detailed images of your spine. Contrast dye is injected to enhance these images, providing clearer visuals for accurate diagnosis.

36 services35 patients

Mri scan of middle spinal canal without contrast 72146

An MRI scan of the middle spinal canal without contrast is a non-invasive imaging test. It uses magnetic fields and radio waves to create detailed images of your spine. This helps doctors identify any abnormalities or issues in your spinal canal. No dye is used in this procedure.

30 services30 patients

Ct scan of lower spine without contrast 72131

A CT scan of the lower spine without contrast is a non-invasive imaging test. It uses X-rays to create detailed images of your lower back area, helping to detect conditions like fractures, infections, or tumors. It's painless and generally quick.

23 services22 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.

22 services22 patients

Mri scan of blood vessels of neck with contrast 70548

An MRI scan of the neck with contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed pictures of your blood vessels in the neck. A contrast dye may be injected to make these images clearer. This helps identify any abnormalities.

19 services19 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.

18 services18 patients

Mri scan of upper spinal canal without contrast 72141

17 services17 patients

X-ray of skull, 1-3 views 70250

An X-ray of the skull involves capturing images of the bones and tissues in your head. This test helps identify issues like fractures, infections, or tumors. The '1-3 views' means pictures will be taken from one to three different angles for a comprehensive assessment.

16 services16 patients

Ct scan of upper spine without contrast 72125

A CT scan of the upper spine without contrast is a non-invasive imaging test that uses X-rays to capture detailed images of your neck and upper back. It helps in identifying issues like fractures, tumors, or infections. No dye (contrast) is used in this scan.

16 services16 patients

Ct scan of soft tissue of neck with contrast 70491

15 services14 patients

Mri scan of blood vessels of head without contrast 70544

12 services12 patients

Mri scan of lower spinal canal before and after contrast 72158

12 services12 patients

Removal of spinal fluid with lower back spinal tap for diagnostic test using imaging guidance 62328

A lower back spinal tap, guided by imaging, is a procedure to collect spinal fluid for testing. A needle is carefully inserted into the lower back to draw out fluid. This can help diagnose various conditions. It's performed under local anesthesia to minimize discomfort.

11 services11 patients

Ct scan head or brain without contrast 70450

11 services11 patients

Ct scan of face with contrast 70487

A CT scan of the face with contrast is a non-invasive imaging test that uses X-rays and a contrast dye to create detailed images of your facial structures. The contrast dye helps to highlight specific areas, providing clearer images for more accurate diagnosis.

11 services11 patients

Mri scan of middle spinal canal without contrast 72146

11 services11 patients

Hospital Affiliations CMS Care Compare 4

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

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

Newton-Wellesley Hospital

Acute Care Hospitals · Newton, MA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220101

Location2014 Washington StreetNewton, MA 02462 · Middlesex County

Emergency services Birthing friendly

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

Faulkner Hospital-Brigham And Women's

Acute Care Hospitals · Boston, MA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220119

Location1153 Centre StreetBoston, MA 02130 · Suffolk County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02114 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$97.64 typical visit price

range $63.72 – $189.86

Typical copayment $24.41 (range $15.93 – $47.46)

Most-billed visit code 99203

Established Patient

$78.84 typical visit price

range $21.07 – $155.29

Typical copayment $19.71 (range $5.26 – $38.82)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 3

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

DR. SIDDHI HEGDE MD

Student in an Organized Health Care Education/Training Program

55 FRUIT ST # 210
BOSTON, MA 02114

Suffolk County (617) 724-4255

DR. JOSEPH DELTON KING III M.D.

Radiology (Diagnostic Radiology)

55 FRUIT ST # 210
BOSTON, MA 02114

Suffolk County (617) 724-4255

ALIREZA AZIZ AHARI MD

Radiology (Diagnostic Radiology)

55 FRUIT ST # 210
BOSTON, MA 02114

Suffolk County (617) 726-8755

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 Thomas Flood's NPI number?

The NPI number for Thomas Flood is 1093155541. It was assigned to this individual provider in the NPPES registry on June 28, 2013.

Where is Thomas Flood located?

Thomas Flood practices at 55 Fruit St # 210, Boston, MA 02114. The listed phone number is (617) 724-7168.

What is Thomas Flood's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Is Thomas Flood enrolled in Medicare?

Yes. Thomas Flood 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 Thomas Flood's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Thomas Flood reassigns Medicare benefits to 8 organizations: Massachusetts General Physicians Organization Inc (Boston, MA), The General Hospital Corporation (Boston, MA), Brigham & Womens Physicians Organization Inc (Boston, MA), The Mclean Hospital Corporation (Belmont, MA), Mass General Brigham Medical Group Suburban Massachusetts Inc (Newton, MA) and 3 more organizations, listed in the Medicare section above. 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 Thomas Flood's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Thomas Flood accept?

Health plans from Taro Health list Thomas Flood 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 Thomas Flood affiliated with any hospitals?

According to CMS data, Thomas Flood is affiliated with Massachusetts General Hospital, Newton-Wellesley Hospital, Brigham And Women's Hospital and Faulkner Hospital-Brigham And Women's.

When was this NPI record last updated?

The NPPES record for Thomas Flood was last updated on July 28, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months 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.