Karin A. O'Brien, APRN
Psychiatric/Mental Health Nurse Practitioner · Lady Lake, FL
Karin A. O'Brien, APRN is a psychiatric/mental health nurse practitioner with a practice address in Lady Lake, Florida, and NPI 1710909932, issued on Jul 24, 2006. Check the license (Florida APRN11015647, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.
- Name
- Karin A. O'Brien
- Credential
- APRN
- Primary taxonomy
- Psychiatric/Mental Health Nurse Practitioner 363LP0808X
- License numbers
- APRN11015647 FL
172893 MA
Self-reported in NPPES; status is on the state search - Practice location
- 809 County Road 466, Lady Lake, FL 32159
- Phone
- (352) 530-2256
- Enumerated
- Jul 24, 2006
- Record last updated
- Feb 7, 2022
- Medicaid ID
- 1897993 MA
- Medicare enrollment
- Enrolled (PECOS I20040204000592); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatric/mental health nurse practitioner records → All 4,715 in Florida → Look up another NPI →
Also registered at 809 County Road 466
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lan Anh NguyenPhysical Therapist1992306351
Verify Karin A. O'Brien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersFlorida health license search
Search for license APRN11015647Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
49% more Medicare Part D claims than the average psychiatric/mental health nurse practitioner in 2024
1,353 Medicare Part D claims for 71 beneficiaries, against an average of 906 among the 30,717 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims.
Most prescribed
- Clonazepam141 claims
- Fluoxetine Hcl83 claims
- Lorazepam71 claims
- Quetiapine Fumarate69 claims
- Lamotrigine64 claims
- Alprazolam62 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 81.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Nova Psychiatric Services, P.CQuincy, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karin A. O'Brien among 4,715 psychiatric/mental health nurse practitioner records in Florida
Karin A. O'Brien, APRN is one of 4,715 psychiatric/mental health nurse practitioner records with a practice address in Florida. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than under 1% of them.
- NPI issued2006 · under 1% of these records are older, 95% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 56% of these records are
- Graduated1998 · median 2021 among the 2,622 with a school on file
- Record last updated2022 · 15% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LP0808X and a Florida practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatric/Mental Health Nurse Practitioner providers in Florida
There are 4,715 psychiatric/mental health nurse practitioner records in Florida.
All 4,715 in Florida → Every provider in Lady Lake → Psychiatric/Mental Health Nurse Practitioner nationwide →
The 8 psychiatric/mental health nurse practitioner records with the nearest ZIP codes
- Julie Davisson, APRN, PMHNP-BCThe Villages, FL 321591366874109
- Cristina DurezaThe Villages, FL 321591205431525
- Janet Walker, PMHNP-BC.The Villages, FL 321591457950107
- Linda Bleecker, ARNPThe Villages, FL 321621245288554
- Cornelia Crum, APRNThe Villages, FL 321621063093151
- Monica Gonzalez, APN-BCThe Villages, FL 321621407078686
- Leslie Muhlhauser, PMHNPThe Villages, FL 321621528150463
- Celia Naccarato, PHD, PMHNP-BCLady Lake, FL 321621386617454
Common questions
What is Karin A. O'Brien, APRN's NPI number?
Karin A. O'Brien, APRN's National Provider Identifier (NPI) is 1710909932, issued on Jul 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Karin A. O'Brien, APRN located?
The NPPES record lists a practice address at 809 County Road 466, Lady Lake, FL, 32159. Phone: (352) 530-2256. Providers update this record themselves, so call before visiting.
How can I verify Karin A. O'Brien, APRN's license?
NPPES lists Florida license number APRN11015647, as entered by the provider. Search the Florida health license search at https://mqa-internet.doh.state.fl.us/mqasearchservices/healthcareproviders. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Karin A. O'Brien, APRN prescribe under Medicare Part D?
In 2024, Karin A. O'Brien, APRN had 1,353 Medicare Part D claims for 71 beneficiaries; the average among psychiatric/mental health nurse practitioner prescribers was 906. Part D covers Medicare prescriptions only.
What is Karin A. O'Brien, APRN's MIPS final score?
The 2023 MIPS final score is 81.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.