Provider Profile
Mary Ellen R. Hannan
Unclaimed ProfileAbout Mary Ellen Hannan
Listed in the NPI registry as a nurse practitioner, Mary Ellen R. Hannan practices in Washington, DC. Mary Ellen is also listed as specializing in registered nurse and nurse practitioner — acute care. Medicare claims data shows Mary Ellen provided 56 services to 38 patients. The services billed most often include critical care, first 30-74 minutes. NPI 1508565177 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
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
- (202) 877-7000
- Email not available
Practice Locations
110 IRVING ST NW
Washington, DC 20010
Procedures Most Often Billed to Medicare
56 services · 38 patients · 1 distinct code
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Critical care, first 30-74 minutes | Office visit | 99291 |
56 | More 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 2
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
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 — 24 related providers in 3 groups
Other nurse practitioners in Washington 8
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2023 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What is Mary Ellen R. Hannan's specialty?
Mary Ellen R. Hannan is a nurse practitioner in Washington, DC. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where can I find Mary Ellen R. Hannan?
Mary Ellen R. Hannan is listed at 110 Irving St Nw, Washington, DC 20010. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Mary Ellen R. Hannan?
The number on file is (202) 877-7000. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Mary Ellen R. Hannan?
Mary Ellen R. Hannan's National Provider Identifier is 1508565177. 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 Mary Ellen R. Hannan's education?
Mary Ellen R. Hannan attended Other, graduating in 2023. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Mary Ellen R. Hannan have?
Mary Ellen R. Hannan has 3 years experience. Calculated from a graduation year of 2023, reported in the CMS National Downloadable File.
CMS public data
What is Mary Ellen R. Hannan known for?
According to Medicare billing data, Mary Ellen R. Hannan 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 Mary Ellen R. Hannan's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Mary Ellen R. Hannan. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.