JOHN F TIERNAN M.D.
NPI 1124027701
Anesthesiology in East Hartford, CT
About John F Tiernan M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN F TIERNAN M.D. (NPI 1124027701) is an individual anesthesiology provider in East Hartford, Connecticut, licensed in Connecticut (03174) and active in the NPI registry since July 2005. He is enrolled in Medicare PECOS and is a graduate of University Of Connecticut School Of Medicine (1990).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 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
John F Tiernan 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 Tiernan reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Hartford, CT 06102
- Reassigned Medicare billing, Connecticut enrollment
- 1,333 clinicians in this Medicare group
Shelton, CT 06484
- Reassigned Medicare billing, Connecticut enrollment
- 727 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 5
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.
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.
EAST HARTFORD, CT 06108
EAST HARTFORD, CT 06108
EAST HARTFORD, CT 06108
EAST HARTFORD, CT 06108
EAST HARTFORD, CT 06108
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 Tiernan's NPI number?
The NPI number for John Tiernan is 1124027701. It was assigned to this individual provider in the NPPES registry on July 18, 2005.
Where is John Tiernan located?
John Tiernan practices at 111 Founders Plz #300 C/O Ipms, East Hartford, CT 06108. The listed phone number is (860) 282-4022.
What is John Tiernan's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is John Tiernan enrolled in Medicare?
Yes. John Tiernan 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 Tiernan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Tiernan reassigns Medicare benefits to 2 organizations: Hartford Hospital (Hartford, CT) and Integrated Anesthesia Associates LLC (Shelton, CT). 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 Tiernan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for John Tiernan was last updated on February 29, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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 F Tiernan, M.D. · NPI 1124027701
Anesthesiology physician in East Hartford, Connecticut. Individual provider, active in the CMS NPPES registry since July 18, 2005.
## Identity
- **NPI:** 1124027701 (Entity type: Individual)
- **Enumerated:** July 18, 2005
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 03174 (Connecticut)
- **Sole proprietor:** No
## Practice location
- **Address:** 111 FOUNDERS PLZ, #300 C/O IPMS, East Hartford, CT 06108-3212
- **Phone:** (860) 282-4022 · **Fax:** (860) 282-0170
## 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): Hartford Hospital (NPI 1770696643, Hartford, CT); Integrated Anesthesia Associates LLC (NPI 1881636397, Shelton, CT) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Connecticut School Of Medicine, class of 1990
## Record status
- **NPPES last updated:** February 29, 2008
- **Other identifiers:** Medicare UPIN F99973 (CT)
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Source: [NPI Profile](https://npiprofile.com/npi/1124027701) · Data from the CMS NPPES public registry.