JOHN JOSEPH STENGLEIN M.D.
NPI 1740419266
Anesthesiology in Boston, MA
About John Joseph Stenglein M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN JOSEPH STENGLEIN M.D. (NPI 1740419266) is an individual anesthesiology provider in Boston, Massachusetts, licensed in Massachusetts (241168) and active in the NPI registry since July 2009. He is enrolled in Medicare PECOS, is affiliated with Baystate Franklin Medical Center, and is a graduate of University Of Massachusetts Medical School (2009).
NPPES Registry Identity
Specialties & Licenses
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
John Joseph Stenglein 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 John Stenglein reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Springfield, MA 01118
- Reassigned Medicare billing, Massachusetts enrollment
- 144 clinicians in this Medicare group
Springfield, MA 01199
- Reassigned Medicare billing, Massachusetts enrollment
- 1,537 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 9
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.
Baystate Franklin Medical Center
Acute Care Hospitals · Greenfield, MABaystate Wing Hospital
Acute Care Hospitals · Palmer, MABaystate Medical Center
Acute Care Hospitals · Springfield, 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 02215
BOSTON, MA 02215
BOSTON, MA 02215
BOSTON, MA 02215
BOSTON, MA 02215
BOSTON, MA 02215
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 John Stenglein's NPI number?
The NPI number for John Stenglein is 1740419266. It was assigned to this individual provider in the NPPES registry on July 6, 2009.
Where is John Stenglein located?
John Stenglein practices at 330 Brookline Avenue, Boston, MA 02215. The listed phone number is (617) 667-5864.
What is John Stenglein's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is John Stenglein enrolled in Medicare?
Yes. John Stenglein 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 John Stenglein's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Stenglein reassigns Medicare benefits to 2 organizations: Springfield Anesthesia Service, Inc. (Springfield, MA) and Baystate Medical Practices, Inc (Springfield, 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 John Stenglein's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Stenglein accept?
Health plans from Taro Health list John Stenglein 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 John Stenglein affiliated with any hospitals?
According to CMS data, John Stenglein is affiliated with Baystate Franklin Medical Center, Baystate Wing Hospital and Baystate Medical Center.
When was this NPI record last updated?
The NPPES record for John Stenglein was last updated on February 25, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.
# John Joseph Stenglein, M.D. · NPI 1740419266
Anesthesiology physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since July 6, 2009.
## Identity
- **NPI:** 1740419266 (Entity type: Individual)
- **Enumerated:** July 6, 2009
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 241168 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 330 BROOKLINE AVENUE, Boston, MA 02215
- **Phone:** (617) 667-5864
## 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): Springfield Anesthesia Service, Inc. (NPI 1093768830, Springfield, MA); Baystate Medical Practices, Inc (NPI 1548205909, Springfield, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Massachusetts Medical School, class of 2009
## Record status
- **NPPES last updated:** February 25, 2013
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Source: [NPI Profile](https://npiprofile.com/npi/1740419266) · Data from the CMS NPPES public registry.