DR. DONALD B BLOCH MD
NPI 1609857739
Internal Medicine - Rheumatology in Boston, MA
About Dr. Donald B Bloch Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. DONALD B BLOCH MD (NPI 1609857739) is an individual rheumatology provider in Boston, Massachusetts, licensed in Massachusetts (552004) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS, is affiliated with North Shore Medical Center -, and is a graduate of Harvard Medical School (1983).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 5
Accepted 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. Donald B Bloch Md 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.
Medicare Billing Reassignments
2Medicare enrollment records show Donald Bloch reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,360 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,234 clinicians in this Medicare group
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
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.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
North Shore Medical Center -
Acute Care Hospitals · Salem, MAMassachusetts General Hospital
Acute Care Hospitals · Boston, MABrigham And Women's Hospital
Acute Care Hospitals · Boston, MAPhysician 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.
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 Donald Bloch's NPI number?
The NPI number for Donald Bloch is 1609857739. It was assigned to this individual provider in the NPPES registry on November 7, 2005.
Where is Donald Bloch located?
Donald Bloch practices at 55 Fruit Street, Yawkey 2100 Rheumatology Associates, Boston, MA 02114. The listed phone number is (617) 726-7938.
What is Donald Bloch's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.
Is Donald Bloch enrolled in Medicare?
Yes. Donald Bloch 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 Donald Bloch's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Donald Bloch reassigns Medicare benefits to 2 organizations: Massachusetts General Physicians Organization Inc (Boston, MA) and The General Hospital Corporation (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 Donald Bloch's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Donald Bloch accept?
Health plans from Taro Health list Donald Bloch 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 Donald Bloch affiliated with any hospitals?
According to CMS data, Donald Bloch is affiliated with North Shore Medical Center -, Massachusetts General Hospital and Brigham And Women's Hospital.
When was this NPI record last updated?
The NPPES record for Donald Bloch was last updated on February 11, 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.
# Dr. Donald B Bloch, MD · NPI 1609857739
Rheumatology physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since November 7, 2005.
## Identity
- **NPI:** 1609857739 (Entity type: Individual)
- **Enumerated:** November 7, 2005
- **Primary specialty:** Internal Medicine - Rheumatology · taxonomy 207RR0500X
- **State license:** 552004 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 55 FRUIT STREET, YAWKEY 2100, RHEUMATOLOGY ASSOCIATES, Boston, MA 02114-2696
- **Phone:** (617) 726-7938 · **Fax:** (617) 643-1274
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA); The General Hospital Corporation (NPI 1023049236, Boston, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Harvard Medical School, class of 1983
## Record status
- **NPPES last updated:** February 11, 2014
- **Other identifiers:** Medicaid 3113108 (MA); Other J13218 (MA); Other 725624 (MA); and 2 more
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Source: [NPI Profile](https://npiprofile.com/npi/1609857739) · Data from the CMS NPPES public registry.