Sara O'Brien, MSN, FNP-C, TCRN
Family Nurse Practitioner · Aberdeen, MD
Sara O'Brien, MSN, FNP-C, TCRN is a family nurse practitioner with a practice address in Aberdeen, Maryland, and NPI 1235896523, issued on Nov 21, 2021. Check the license (Maryland AC004061, as entered in NPPES) with the Maryland board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Sara O'Brien
- Credential
- MSN, FNP-C, TCRN
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- AC004061 MD
Self-reported in NPPES; status is on the state search - Practice location
- 744 S Philadelphia Blvd Ste B, Aberdeen, MD 21001
- Phone
- (443) 345-2650
- Enumerated
- Nov 21, 2021
- Record last updated
- Aug 23, 2024
- Medicare enrollment
- Enrolled (PECOS I20221019000014); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 4,124 in Maryland → Look up another NPI →
Verify Sara O'Brien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this profession
Search for license AC004061Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
83% fewer Medicare Part D claims than the average family nurse practitioner in 2024
218 Medicare Part D claims for 156 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D.
Most prescribed
- Amoxicillin-Clavulanate Potass28 claims
- Doxycycline Hyclate21 claims
- Cephalexin20 claims
- Prednisone19 claims
- Fluticasone Propionate18 claims
- Albuterol Sulfate Hfa15 claims
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.
Bills Medicare through one group practice
- Christiana Care Quality PartnersNewark, DE
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sara O'Brien among 4,124 family nurse practitioner records in Maryland
Sara O'Brien, MSN, FNP-C, TCRN is one of 4,124 family nurse practitioner records with a practice address in Maryland. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 65% of them.
- NPI issued2021 · 65% of these records are older, 28% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2015 · median 2019 among the 2,370 with a school on file
- Record last updated2024 · 41% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
14 family nurse practitioner records list a practice address in Aberdeen
They are 14 of the 361 NPPES records with a practice address in Aberdeen, and 4,124 family nurse practitioner records in Maryland.
All 4,124 in Maryland → Every provider in Aberdeen → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Mariama FosterAberdeen, MD 210011851261655
- Karen Johnson, C.R.N.P.Aberdeen, MD 210011730321241
- Karla Kinker, FNP-CAberdeen, MD 210011326832437
- Colleen Krajewski, C.R.N.P.Aberdeen, MD 210011083939375
- Belinda Lincoln-Lee, CRNPAberdeen, MD 210011063968857
- Michelle McNatt, CRNPAberdeen, MD 210011952108151
- Rita Muriithi, NURSE PRACTITIONERAberdeen, MD 210011831892652
- Ing-On Piamtong, FNP-CAberdeen, MD 210011306697164
Common questions
What is Sara O'Brien, MSN, FNP-C, TCRN's NPI number?
Sara O'Brien, MSN, FNP-C, TCRN's National Provider Identifier (NPI) is 1235896523, issued on Nov 21, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Sara O'Brien, MSN, FNP-C, TCRN located?
The NPPES record lists a practice address at 744 S Philadelphia Blvd Ste B, Aberdeen, MD, 21001. Phone: (443) 345-2650. Providers update this record themselves, so call before visiting.
How can I verify Sara O'Brien, MSN, FNP-C, TCRN's license?
NPPES lists Maryland license number AC004061, as entered by the provider. Search the Maryland board that licenses this profession; the NPPES record confirms identity only.
How much does Sara O'Brien, MSN, FNP-C, TCRN prescribe under Medicare Part D?
In 2024, Sara O'Brien, MSN, FNP-C, TCRN had 218 Medicare Part D claims for 156 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.