DR. DAVID ALAN SWEETSER MD
NPI 1558320762
Medical Genetics - Clinical Genetics (M.D.) in Boston, MA
About Dr. David Alan Sweetser Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. DAVID ALAN SWEETSER MD (NPI 1558320762) is an individual clinical genetics (m.d.) provider in Boston, Massachusetts, licensed in Massachusetts (216677) and active in the NPI registry since March 2006. He is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and is a graduate of Washington University School Of Medicine (1989).
NPPES Registry Identity
Specialties & Licenses 4
Other Identifiers 3
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. David Alan Sweetser 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 David Sweetser 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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Massachusetts General Hospital
Acute Care Hospitals · Boston, MAFrequently 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 David Sweetser's NPI number?
The NPI number for David Sweetser is 1558320762. It was assigned to this individual provider in the NPPES registry on March 17, 2006.
Where is David Sweetser located?
David Sweetser practices at 55 Fruit St Yaw 8B Pediatric Hematology Oncology, Boston, MA 02114. The listed phone number is (617) 726-2737.
What is David Sweetser's specialty?
The primary specialty registered for this NPI is Medical Genetics, specializing in Clinical Genetics (M.D.), with taxonomy code 207SG0201X.
Is David Sweetser enrolled in Medicare?
Yes. David Sweetser 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 David Sweetser's services?
According to the CMS Revalidation Reassignment List (October 2026 release), David Sweetser 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 David Sweetser's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does David Sweetser accept?
Health plans from Taro Health list David Sweetser 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 David Sweetser affiliated with any hospitals?
According to CMS data, David Sweetser is affiliated with Massachusetts General Hospital.
When was this NPI record last updated?
The NPPES record for David Sweetser was last updated on January 15, 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. David Alan Sweetser, MD · NPI 1558320762
Clinical Genetics (M.D.) physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since March 17, 2006.
## Identity
- **NPI:** 1558320762 (Entity type: Individual)
- **Enumerated:** March 17, 2006
- **Primary specialty:** Medical Genetics - Clinical Genetics (M.D.) · taxonomy 207SG0201X
- **State license:** 216677 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 55 FRUIT ST YAW 8B, PEDIATRIC HEMATOLOGY ONCOLOGY, Boston, MA 02114-2696
- **Phone:** (617) 726-2737 · **Fax:** (617) 724-0702
## 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:** Washington University School Of Medicine, class of 1989
## Record status
- **NPPES last updated:** January 15, 2019
- **Other identifiers:** Other J26055 (MA); Medicaid 2007801 (MA); Other 216677 (MA)
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Source: [NPI Profile](https://npiprofile.com/npi/1558320762) · Data from the CMS NPPES public registry.