Mary Katherine O'Sullivan, DNP, ARNP
Acute Care Nurse Practitioner · New York, NY
Mary Katherine O'Sullivan, DNP, ARNP is an acute care nurse practitioner with a practice address in New York, New York, and NPI 1699389494, issued on Aug 31, 2020. Check the license (New York 3290436, as entered in NPPES) with the New York board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mary Katherine O'Sullivan
- Credential
- DNP, ARNP
- Primary taxonomy
- Acute Care Nurse Practitioner 363LA2100X
- License numbers
- 3290436 NY
AP61441998 WA
Self-reported in NPPES; status is on the state search - Practice location
- 1275 York Ave, New York, NY 10065
- Phone
- (347) 798-9213
- Enumerated
- Aug 31, 2020
- Record last updated
- May 5, 2025
- Entity
- Type 1 · individual
8 nearest acute care nurse practitioner records → All 1,720 in New York → Look up another NPI →
Also registered at 1275 York Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mary Katherine O'Sullivan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich New York board licenses this profession
Search for license 3290436Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average acute care nurse practitioner in 2024
77 Medicare Part D claims for 25 beneficiaries, against an average of 594 among the 13,133 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Mary Katherine O'Sullivan among 1,720 acute care nurse practitioner records in New York
Mary Katherine O'Sullivan, DNP, ARNP is one of 1,720 acute care nurse practitioner records with a practice address in New York. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 53% of them.
- NPI issued2020 · 53% of these records are older, 42% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileNo · 56% of these records are
- Record last updated2025 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LA2100X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Acute Care Nurse Practitioner providers in New York
There are 1,720 acute care nurse practitioner records in New York.
All 1,720 in New York → Every provider in New York → Acute Care Nurse Practitioner nationwide →
The 8 acute care nurse practitioner records with the nearest ZIP codes
- Michelle Armella, NPNew York, NY 100651528245958
- Alison Costalos, NPNew York, NY 100651184673055
- Lorraine Jackson, NURSE PRACTITIONERNew York, NY 100651326207267
- Marykate Kasler, ACNPNew York, NY 100651497923700
- Stefanie Keating, NPNew York, NY 100651568653442
- Denise Margiotta, NPNew York, NY 100651750578233
- Mary Montefusco, ACNP-BCNew York, NY 100651063671972
- Rachel Nebab, RN,MA,AOCNP, ACNP,BCNew York, NY 100651831395417
Common questions
What is Mary Katherine O'Sullivan, DNP, ARNP's NPI number?
Mary Katherine O'Sullivan, DNP, ARNP's National Provider Identifier (NPI) is 1699389494, issued on Aug 31, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Mary Katherine O'Sullivan, DNP, ARNP located?
The NPPES record lists a practice address at 1275 York Ave, New York, NY, 10065. Phone: (347) 798-9213. Providers update this record themselves, so call before visiting.
How can I verify Mary Katherine O'Sullivan, DNP, ARNP's license?
NPPES lists New York license number 3290436, as entered by the provider. Search the New York board that licenses this profession; the NPPES record confirms identity only.
How much does Mary Katherine O'Sullivan, DNP, ARNP prescribe under Medicare Part D?
In 2024, Mary Katherine O'Sullivan, DNP, ARNP had 77 Medicare Part D claims for 25 beneficiaries; the average among acute care nurse practitioner prescribers was 594. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.