TRACEY GLENN O'BRIEN MD
NPI 1467914630
Internal Medicine - Critical Care Medicine in Bridgeport, CT
About Tracey Glenn O'brien Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
TRACEY GLENN O'BRIEN MD (NPI 1467914630) is an individual critical care medicine provider in Bridgeport, Connecticut, licensed in Connecticut (077052) and active in the NPI registry since April 2019. She is enrolled in Medicare PECOS and is a graduate of Other (2019).
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
Tracey Glenn O'brien 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 Reassignment
Medicare enrollment records show Tracey O'brien reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Hartford, CT 06106
- Reassigned Medicare billing, Connecticut enrollment
- 1,921 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 06606 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.
BRIDGEPORT, CT 06606
BRIDGEPORT, CT 06606
BRIDGEPORT, CT 06606
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 Tracey O'brien's NPI number?
The NPI number for Tracey O'brien is 1467914630. It was assigned to this individual provider in the NPPES registry on April 4, 2019.
Where is Tracey O'brien located?
Tracey O'brien practices at 2800 Main St, Bridgeport, CT 06606. The listed phone number is (475) 210-5663.
What is Tracey O'brien's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.
Is Tracey O'brien enrolled in Medicare?
Yes. Tracey O'brien 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 organization bills Medicare for Tracey O'brien's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Tracey O'brien reassigns Medicare benefits to Hartford Healthcare Medical Group Specialists, PLLC (Hartford, CT). The 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 Tracey O'brien's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Tracey O'brien accept?
Health plans from Anthem Blue Cross and Blue Shield list Tracey O'brien 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 Tracey O'brien was last updated on May 10, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Tracey Glenn O'brien, MD · NPI 1467914630
Critical Care Medicine physician in Bridgeport, Connecticut. Individual provider, active in the CMS NPPES registry since April 4, 2019.
## Identity
- **NPI:** 1467914630 (Entity type: Individual)
- **Enumerated:** April 4, 2019
- **Primary specialty:** Internal Medicine - Critical Care Medicine · taxonomy 207RC0200X
- **State license:** 077052 (Connecticut)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 2800 MAIN ST, Bridgeport, CT 06606-4201
- **Phone:** (475) 210-5663 · **Fax:** (475) 210-4079
## 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:** Hartford Healthcare Medical Group Specialists, PLLC (NPI 1023584216, Hartford, CT), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2019
## Record status
- **NPPES last updated:** May 10, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1467914630) · Data from the CMS NPPES public registry.