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DR. SETH MICHAEL BLOOM M.D., PH.D.
NPI 1992069926
Internal Medicine in Boston, MA

Active since June 25, 2012PECOS EnrolledAccepts Medicare Assignment
55 FRUIT STREET, GRJ-504, MASS GENERAL HOSPITAL, INFECTIOUS DISEASES DIVISION, BOSTON, MA 02114(617) 726-3816(617) 726-7416 Get Directions Write a Review

NPPES record last updated: March 15, 2017. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Seth Michael Bloom M.d., Ph.d. NPPES

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

DR. SETH MICHAEL BLOOM M.D., PH.D. (NPI 1992069926) is an individual internal medicine provider in Boston, Massachusetts, licensed in Massachusetts (262448) and active in the NPI registry since June 2012. He is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and is a graduate of Washington University School Of Medicine (2012).

NPPES Registry Identity

NPI1992069926
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. SETH MICHAEL BLOOMCredential: M.D., PH.D.
Location Address55 FRUIT STREET, GRJ-504, MASS GENERAL HOSPITAL, INFECTIOUS DISEASES DIVISIONBoston, MA 02114
Mailing Address55 Fruit Street, Grj-504, Mass General Hospital, Infectious Diseases DivisionBoston, MA 02114 · (617) 726-3816 · Fax (617) 726-7416
Phone(617) 726-3816
Fax(617) 726-7416
Sole ProprietorNo
Medical School CMSWashington University School Of MedicineGraduated 2012
Enumeration DateJune 25, 2012
Last NPPES UpdateMarch 15, 2017
✔ NPI 1992069926 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in MA · 262448
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedInternal Medicine · Infectious DiseaseTaxonomy 207RI0200X · License 262448 (MA)
55 FRUIT STREET, GRJ-504, Boston, MA 02114
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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. Seth Michael Bloom 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 ID3779711619
PECOS Enrollment IDI20170717002140
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

3

Medicare enrollment records show Seth Bloom reassigns Medicare billing to 3 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

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 3

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
100 services34 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
27 services27 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
20 services15 patients

Hospital Affiliations CMS Care Compare

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

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
$144.11 typical visit price
range $63.72 – $189.86
Typical copayment $36.02 (range $15.93 – $47.46)
Most-billed visit code 99204
Established Patient
$111.18 typical visit price
range $21.07 – $155.29
Typical copayment $27.79 (range $5.26 – $38.82)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Seth Bloom's NPI number?

The NPI number for Seth Bloom is 1992069926. It was assigned to this individual provider in the NPPES registry on June 25, 2012.

Where is Seth Bloom located?

Seth Bloom practices at 55 Fruit Street, Grj-504 Mass General Hospital, Infectious Diseases Division, Boston, MA 02114. The listed phone number is (617) 726-3816.

What is Seth Bloom's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Seth Bloom enrolled in Medicare?

Yes. Seth Bloom 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 Seth Bloom's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Seth Bloom reassigns Medicare benefits to 3 organizations: Massachusetts General Physicians Organization Inc (Boston, MA), The General Hospital Corporation (Boston, MA) and Brigham & Womens Physicians Organization Inc (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 Seth Bloom's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Seth Bloom accept?

Health plans from Taro Health list Seth Bloom 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 Seth Bloom affiliated with any hospitals?

According to CMS data, Seth Bloom is affiliated with Massachusetts General Hospital.

When was this NPI record last updated?

The NPPES record for Seth Bloom was last updated on March 15, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.