STEPHEN G. FLYNN M.D.
NPI 1003049842
Anesthesiology - Pediatric Anesthesiology in Boston, MA
About Stephen G. Flynn M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
STEPHEN G. FLYNN M.D. (NPI 1003049842) is an individual pediatric anesthesiology provider in Boston, Massachusetts, licensed in Massachusetts (280886) and active in the NPI registry since August 2009. He is enrolled in Medicare PECOS, maintains 3 additional practice locations, and is a graduate of Other (2006).
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 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
Stephen G. Flynn 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 Stephen Flynn reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02115
- Reassigned Medicare billing, Massachusetts enrollment
- 256 clinicians in this Medicare group
Charlottesville, VA 22911
- Reassigned Medicare billing, Virginia enrollment
- 2,820 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02115 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 02115
BOSTON, MA 02115
BOSTON, MA 02115
BOSTON, MA 02115
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 Stephen Flynn's NPI number?
The NPI number for Stephen Flynn is 1003049842. It was assigned to this individual provider in the NPPES registry on August 27, 2009.
Where is Stephen Flynn located?
Stephen Flynn practices at 300 Longwood Ave, Boston, MA 02115. The listed phone number is (617) 355-6000.
What is Stephen Flynn's specialty?
The primary specialty registered for this NPI is Anesthesiology, specializing in Pediatric Anesthesiology, with taxonomy code 207LP3000X.
Is Stephen Flynn enrolled in Medicare?
Yes. Stephen Flynn 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 Stephen Flynn's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Stephen Flynn reassigns Medicare benefits to 2 organizations: Chmc Anesthesia Foundation Inc (Boston, MA) and University Of Virginia Physicians Group (Charlottesville, VA). 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 Stephen Flynn's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Stephen Flynn accept?
Health plans from Oscar Health and Taro Health list Stephen Flynn 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.
When was this NPI record last updated?
The NPPES record for Stephen Flynn was last updated on June 17, 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.
# Stephen G. Flynn, M.D. · NPI 1003049842
Pediatric Anesthesiology physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since August 27, 2009.
## Identity
- **NPI:** 1003049842 (Entity type: Individual)
- **Enumerated:** August 27, 2009
- **Primary specialty:** Anesthesiology - Pediatric Anesthesiology · taxonomy 207LP3000X
- **State license:** 280886 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 LONGWOOD AVE, Boston, MA 02115
- **Phone:** (617) 355-6000
## 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): Chmc Anesthesia Foundation Inc (NPI 1831268754, Boston, MA); University Of Virginia Physicians Group (NPI 1033138250, Charlottesville, VA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2006
## Record status
- **NPPES last updated:** June 17, 2019
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Source: [NPI Profile](https://npiprofile.com/npi/1003049842) · Data from the CMS NPPES public registry.