THERON O'HALLORAN MD
NPI 1093344145
Obstetrics & Gynecology in Glen Burnie, MD
About Theron O'halloran Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
THERON O'HALLORAN MD (NPI 1093344145) is an individual obstetrics & gynecology provider in Glen Burnie, Maryland, licensed in Maryland (D0100658) and active in the NPI registry since April 2020. He is enrolled in Medicare PECOS, is affiliated with University Of Md Baltimore Washington Medical Center, and is a graduate of Western Michigan Un Homer Stryker School Of Med (2020).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Theron O'halloran 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
University Of MD Baltimore Washington Medical Center
Acute Care Hospitals · Glen Burnie, MDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 21061 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.
GLEN BURNIE, MD 21061
GLEN BURNIE, MD 21061
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 Theron O'halloran's NPI number?
The NPI number for Theron O'halloran is 1093344145. It was assigned to this individual provider in the NPPES registry on April 1, 2020.
Where is Theron O'halloran located?
Theron O'halloran practices at 301 Hospital Dr, Glen Burnie, MD 21061. The listed phone number is (410) 787-4000.
What is Theron O'halloran's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Theron O'halloran enrolled in Medicare?
Yes. Theron O'halloran 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.
Is Theron O'halloran affiliated with any hospitals?
According to CMS data, Theron O'halloran is affiliated with University Of MD Baltimore Washington Medical Center.
When was this NPI record last updated?
The NPPES record for Theron O'halloran was last updated on September 23, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months 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.
# Theron O'halloran, MD · NPI 1093344145
Obstetrics & Gynecology physician in Glen Burnie, Maryland. Individual provider, active in the CMS NPPES registry since April 1, 2020.
## Identity
- **NPI:** 1093344145 (Entity type: Individual)
- **Enumerated:** April 1, 2020
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** D0100658 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 301 HOSPITAL DR, Glen Burnie, MD 21061-5803
- **Phone:** (410) 787-4000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Medical school:** Western Michigan Un Homer Stryker School Of Med, class of 2020
## Record status
- **NPPES last updated:** September 23, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1093344145) · Data from the CMS NPPES public registry.