Provider Profile
Margaret K. Halloran, NP
Unclaimed ProfileAbout Margaret Halloran
Listed in the NPI registry as a nurse practitioner, Margaret K. Halloran, NP practices in Ann Arbor, MI. Margaret is also listed as specializing in nurse practitioner — women's health. Medicare claims data shows Margaret provided 129 services to 118 patients. The services billed most often include cervical or vaginal cancer screening; pelvic and clinical breast examination, established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, and established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (734) 936-4000
- Email not available
Practice Locations
1500 E MEDICAL CENTER DR
Ann Arbor, MI 48109
1501 Lansdowne Ave Ste 208
Darby, PA 19023
Procedures Most Often Billed to Medicare
129 services · 118 patients · 4 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Cervical or vaginal cancer screening; pelvic and clinical breast examination | Billing code | G0101 |
52 | More often than most peers in Nurse Practitioner |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
34 | Less often than most peers in Nurse Practitioner |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
30 | Less often than most peers in Nurse Practitioner |
| Automated urinalysis test | Lab test | 81003 |
13 | Less often than most peers in Nurse Practitioner |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other nurse practitioners at this location 4
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 6
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 20 related providers in 3 groups
Other nurse practitioners in Ann Arbor 4
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2018 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What is Margaret K. Halloran's specialty?
Margaret K. Halloran is a nurse practitioner in Ann Arbor, MI. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where can I find Margaret K. Halloran?
Margaret K. Halloran is listed at 1500 E Medical Center Dr, Ann Arbor, MI 48109. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Margaret K. Halloran?
The number on file is (734) 936-4000. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Margaret K. Halloran?
Margaret K. Halloran's National Provider Identifier is 1497220131. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Margaret K. Halloran's education?
Margaret K. Halloran attended Other, graduating in 2018. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Margaret K. Halloran have?
Margaret K. Halloran has 8 years experience. Calculated from a graduation year of 2018, reported in the CMS National Downloadable File.
CMS public data
What is Margaret K. Halloran known for?
According to Medicare billing data, Margaret K. Halloran the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Margaret K. Halloran's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Margaret K. Halloran. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.