Karen Olivia Callahan, ARNP
Nurse Practitioner · Lady Lake, FL
Karen Olivia Callahan, ARNP is a nurse practitioner with a practice address in Lady Lake, Florida, and NPI 1538671672, issued on Oct 30, 2017. Check the license (Florida 9249882, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.
- Name
- Karen Olivia Callahan
- Credential
- ARNP
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- 9249882 FL
Self-reported in NPPES; status is on the state search - Practice location
- 607 Highway 466, Lady Lake, FL 32159
- Phone
- (352) 259-7994
- Enumerated
- Oct 30, 2017
- Record last updated
- Mar 17, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (352) 259-7994
- Medicare enrollment
- Enrolled (PECOS I20180112001957); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 607 Highway 466
A shared address usually means a shared clinic or building; it does not show who employs whom.
- John Burress, DOFamily Medicine Physician1649295973
- Ning Chiou, PTPhysical Therapist1174600803
- Dusk Gosney, DOAdult Medicine Physician1659011070
- Mohamed Ibrahim, PTSpecialist1043488216
- Glenn McKeon, PA-CPhysician Assistant1366414724
- Robert Neale, OTSpecialist1689842874
Verify Karen Olivia Callahan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersFlorida health license search
Search for license 9249882Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
6.1 times the Medicare Part D claims of the average nurse practitioner in 2024
6,799 Medicare Part D claims for 785 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 55 claims were for opioids.
Most prescribed
- Levothyroxine Sodium438 claims
- Atorvastatin Calcium429 claims
- Lisinopril341 claims
- Rosuvastatin Calcium261 claims
- Losartan Potassium230 claims
- Omeprazole212 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 MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $244.68
11 payments; by number, the most common kind was food and beverage; the largest payer was Bioventus LLC. The 38,884 providers of this specialty with any payment received $791.64 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 3 group practices
- Cora Health Services IncThe Villages, FL
- Family Health Enterprises IncLady Lake, FL
- Legacy Healthcare Services IncThe Villages, FL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
17 nurse practitioner records list a practice address in Lady Lake
They are 17 of the 385 NPPES records with a practice address in Lady Lake, and 8,844 nurse practitioner records in Florida.
All 17 in Lady Lake → All 8,844 in Florida → Every provider in Lady Lake →
Other nurse practitioner records in Florida
- Zenis Aballe HoyosFort Myers, FL1154112043
- Mario Aballe MosquedaNaples, FL1831841188
- Mariela AbarcaMiami, FL1154092971
- Fawaz Abass, APRN, AGNP-COrlando, FL1184336869
- Julie Abbate, ARNPBoca Raton, FL1457318370
- Carol Abbott, ARNP, FNP-CJacksonville, FL1629427240
- Aisha Abdel-Motelb, FNPMiami, FL1932405339
- Jeanne Abdou, APRNCape Coral, FL1982686689
- Katie Abel, APRNGainesville, FL1558153619
- Levi Abell, APRNGulf Breeze, FL1689325722
Common questions
What is Karen Olivia Callahan, ARNP's NPI number?
Karen Olivia Callahan, ARNP's National Provider Identifier (NPI) is 1538671672, issued on Oct 30, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Karen Olivia Callahan, ARNP located?
The NPPES record lists a practice address at 607 Highway 466, Lady Lake, FL, 32159. Phone: (352) 259-7994. Providers update this record themselves, so call before visiting.
How can I verify Karen Olivia Callahan, ARNP's license?
NPPES lists Florida license number 9249882, 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 Karen Olivia Callahan, ARNP prescribe under Medicare Part D?
In 2024, Karen Olivia Callahan, ARNP had 6,799 Medicare Part D claims for 785 beneficiaries; the average among nurse practitioner prescribers was 1,109. Part D covers Medicare prescriptions only.
What is Karen Olivia Callahan, ARNP's MIPS final score?
The 2023 MIPS final score is 100 of 100. 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.