DR. SANDRA BLISS NELSON M.D.
NPI 1366589863
Internal Medicine - Infectious Disease in Boston, MA
About Dr. Sandra Bliss Nelson M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. SANDRA BLISS NELSON M.D. (NPI 1366589863) is an individual infectious disease provider in Boston, Massachusetts, licensed in Massachusetts (231994) and active in the NPI registry since January 2007. She is enrolled in Medicare PECOS, is affiliated with North Shore Medical Center -, and is a graduate of Duke University School Of Medicine (1997).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
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. Sandra Bliss Nelson 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.
Medicare Billing Reassignments
2Medicare enrollment records show Sandra Nelson 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 8
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, MANewton-Wellesley Hospital
Acute Care Hospitals · Newton, 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.
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.
BOSTON, MA 02114
BOSTON, MA 02114
BOSTON, MA 02114
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 Sandra Nelson's NPI number?
The NPI number for Sandra Nelson is 1366589863. It was assigned to this individual provider in the NPPES registry on January 31, 2007. The provider is also known as Dr. Sandra Jeanne Bliss.
Where is Sandra Nelson located?
Sandra Nelson practices at 55 Fruit St Massachusetts General Hospital; Grj504, Boston, MA 02114. The listed phone number is (617) 726-3816.
What is Sandra Nelson's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.
Is Sandra Nelson enrolled in Medicare?
Yes. Sandra Nelson 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 Sandra Nelson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sandra Nelson 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 Sandra Nelson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Sandra Nelson affiliated with any hospitals?
According to CMS data, Sandra Nelson is affiliated with North Shore Medical Center -, Massachusetts General Hospital and Newton-Wellesley Hospital.
When was this NPI record last updated?
The NPPES record for Sandra Nelson was last updated on October 8, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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. Sandra Bliss Nelson, M.D. · NPI 1366589863
Infectious Disease physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since January 31, 2007.
## Identity
- **NPI:** 1366589863 (Entity type: Individual)
- **Enumerated:** January 31, 2007
- **Primary specialty:** Internal Medicine - Infectious Disease · taxonomy 207RI0200X
- **State license:** 231994 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 55 FRUIT ST, MASSACHUSETTS GENERAL HOSPITAL; GRJ504, Boston, MA 02114-2621
- **Phone:** (617) 726-3816
## 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:** Duke University School Of Medicine, class of 1997
## Record status
- **NPPES last updated:** October 8, 2019
---
Source: [NPI Profile](https://npiprofile.com/npi/1366589863) · Data from the CMS NPPES public registry.