DR. DAN ELLIS MD
NPI 1437391497
Anesthesiology in Boston, MA
About Dr. Dan Ellis Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. DAN ELLIS MD (NPI 1437391497) is an individual anesthesiology provider in Boston, Massachusetts, licensed in Massachusetts (246811) and active in the NPI registry since April 2009. He is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and is a graduate of Baylor College Of Medicine (2006).
NPPES Registry Identity
Specialties & Licenses
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. Dan Ellis 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
3Medicare enrollment records show Dan Ellis reassigns Medicare billing to 3 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
- 478 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,234 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,360 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 2
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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Massachusetts General Hospital
Acute Care Hospitals · Boston, MAMassachusetts Eye And Ear Infirmary -
Acute Care Hospitals · Boston, MAOther 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
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 Dan Ellis's NPI number?
The NPI number for Dan Ellis is 1437391497. It was assigned to this individual provider in the NPPES registry on April 6, 2009.
Where is Dan Ellis located?
Dan Ellis practices at 243 Charles St, Boston, MA 02114. The listed phone number is (617) 573-3380.
What is Dan Ellis's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Dan Ellis enrolled in Medicare?
Yes. Dan Ellis 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 Dan Ellis's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Dan Ellis reassigns Medicare benefits to 3 organizations: Massachusetts Eye And Ear Associates, Inc. (Boston, MA), The General Hospital Corporation (Boston, MA) and Massachusetts General 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 Dan Ellis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Dan Ellis affiliated with any hospitals?
According to CMS data, Dan Ellis is affiliated with Massachusetts General Hospital and Massachusetts Eye And Ear Infirmary -.
When was this NPI record last updated?
The NPPES record for Dan Ellis was last updated on May 5, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# Dr. Dan Ellis, MD · NPI 1437391497
Anesthesiology physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since April 6, 2009.
## Identity
- **NPI:** 1437391497 (Entity type: Individual)
- **Enumerated:** April 6, 2009
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 246811 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 243 CHARLES ST, Boston, MA 02114-3002
- **Phone:** (617) 573-3380
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Massachusetts Eye And Ear Associates, Inc. (NPI 1932574332, Boston, MA); The General Hospital Corporation (NPI 1023049236, Boston, MA); Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Baylor College Of Medicine, class of 2006
## Record status
- **NPPES last updated:** May 5, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1437391497) · Data from the CMS NPPES public registry.