ELIZABETH MARY CONWAY O'CALLAHAN MD
NPI 1346773074
Family Medicine in Brooklyn, NY
About Elizabeth Mary Conway O'callahan Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ELIZABETH MARY CONWAY O'CALLAHAN MD (NPI 1346773074) is an individual family medicine provider in Brooklyn, New York, licensed in New York (305869) and active in the NPI registry since April 2017. She is enrolled in Medicare PECOS, maintains a secondary practice location in Fitchburg, and is a graduate of Other (2017).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 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
Elizabeth Mary Conway O'callahan 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 Elizabeth O'callahan reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
New York, NY 10017
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: One Medical Of Ny PC
- 139 clinicians in this Medicare group
New York, NY 10019
- Reassigned Medicare billing, New York enrollment
- 99 clinicians in this Medicare group
Gardner, MA 01440
- Reassigned Medicare billing, Massachusetts enrollment
- 124 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 11201 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 19
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Elizabeth O'callahan's NPI number?
The NPI number for Elizabeth O'callahan is 1346773074. It was assigned to this individual provider in the NPPES registry on April 10, 2017.
Where is Elizabeth O'callahan located?
Elizabeth O'callahan practices at 165 Smith St, Brooklyn, NY 11201. The listed phone number is (212) 441-4380.
What is Elizabeth O'callahan's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Elizabeth O'callahan enrolled in Medicare?
Yes. Elizabeth O'callahan 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 Elizabeth O'callahan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Elizabeth O'callahan reassigns Medicare benefits to 3 organizations: One Medical Of Ny, P.C. (New York, NY), Mount Sinai School Of Medicine (New York, NY) and Community Health Connections, Inc. (Gardner, 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 Elizabeth O'callahan'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 Elizabeth O'callahan was last updated on December 1, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Elizabeth Mary Conway O'callahan, MD · NPI 1346773074
Family Medicine physician in Brooklyn, New York. Individual provider, active in the CMS NPPES registry since April 10, 2017.
## Identity
- **NPI:** 1346773074 (Entity type: Individual)
- **Enumerated:** April 10, 2017
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** 305869 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 165 SMITH ST, Brooklyn, NY 11201-6337
- **Phone:** (212) 441-4380 · **Fax:** (212) 867-4353
## 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): One Medical Of Ny, P.C. (NPI 1861709487, New York, NY); Mount Sinai School Of Medicine (NPI 1528538774, New York, NY); Community Health Connections, Inc. (NPI 1225742174, Gardner, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2017
## Record status
- **NPPES last updated:** December 1, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1346773074) · Data from the CMS NPPES public registry.