Karen Olivia Callahan, ARNP
Nurse Practitioner · Lady Lake, FL
At a glance
607 Highway 466, Lady Lake, FL 32159-6338
NPPES record updated Mar 17, 2018. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
607 Highway 466Lady Lake, FL 32159-6338
Additional reported practice locations
3536 Picciola Cutoff RdFruitland Park, FL 347316309
Phone: 3525363660
Education & affiliations
- Medical / professional school
- Not reported in this file
- Graduation year
- 2017
- CMS specialties
- Nurse Practitioner
Practice groups
Reported hospital affiliations
- Villages Regional Hospital, The The Villages, FL
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
No displayed procedure-category record in this release. This does not mean the clinician performs no procedures.
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Find providers with a similar service mix
Compare 2024 published Medicare activity in the same reported specialty, here or in another city.
Reported clinician measures
Measures below describe reported clinician performance in the stated period. They do not form an overall HCPList rating, and reporting differs between clinicians.
Published clinical measures
- Diabetes: Hemoglobin A1c (HbA1c) Poor Control (>9%)
- 28%2024Published MIPS performance rate. Lower rates indicate better performance for this inverse measure. Measure: MIPS_EC_001_overall. Collection type: EHR. Measure denominator: 156.
- Screening for Osteoporosis for Women Aged 65-85 Years of Age
- 88%2024Published MIPS performance rate. Higher rates indicate better performance for this measure. Measure: MIPS_EC_039_overall. Collection type: REG. Measure denominator: 515.
- Documentation of Current Medications in the Medical Record
- 98%2024Published MIPS performance rate. Higher rates indicate better performance for this measure. Measure: MIPS_EC_130_overall. Collection type: EHR. Measure denominator: 4079.
See all 9 reported measures
- Preventive Care and Screening: Screening for Depression and Follow-Up Plan
- 99%2024Published MIPS performance rate. Higher rates indicate better performance for this measure. Measure: MIPS_EC_134_overall. Collection type: EHR. Measure denominator: 1458.
- Preventive Care and Screening: Tobacco Use: Screening and Cessation Intervention
- 100%2024Published MIPS performance rate. Higher rates indicate better performance for this measure. Measure: MIPS_EC_226_performance. Collection type: EHR. Measure denominator: 89.
- Controlling High Blood Pressure
- 75%2024Published MIPS performance rate. Higher rates indicate better performance for this measure. Measure: MIPS_EC_236_overall. Collection type: EHR. Measure denominator: 710.
- Cervical Cancer Screening
- 100%2024Published MIPS performance rate. Higher rates indicate better performance for this measure. Measure: MIPS_EC_309_overall. Collection type: EHR. Measure denominator: 205.
- Falls: Screening for Future Fall Risk
- 18%2024Published MIPS performance rate. Higher rates indicate better performance for this measure. Measure: MIPS_EC_318_overall. Collection type: EHR. Measure denominator: 924.
- Closing the Referral Loop: Receipt of Specialist Report
- 41%2024Published MIPS performance rate. Higher rates indicate better performance for this measure. Measure: MIPS_EC_374_overall. Collection type: EHR. Measure denominator: 535.
Source: PY 2024 Clinician Public Reporting: MIPS Measures and Attestations · Published Sep 10, 2026.
Industry-reported general payments
Includes reported transfers of value, such as meals, travel, or consulting. Payments do not establish improper conduct or quality of care. Research funding and ownership values are excluded from this total.
See payment purposes and reporting companies
Reported purposes
| Purpose | Amount |
|---|---|
| Food and beverage | $274.78 |
Reporting companies
| Company | Amount |
|---|---|
| EXACT SCIENCES CORPORATION | $63.41 |
| NOVO NORDISK INC | $59.90 |
| BIOVENTUS LLC | $46.51 |
| LILLY USA, LLC | $35.74 |
| BOSTON SCIENTIFIC CORPORATION | $30.56 |
| AVANOS MEDICAL | $24.76 |
| AMGEN INC. | $13.90 |
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Nurse Practitioner
- Taxonomy code
- 363L00000X
- Enumeration date
- Oct 30, 2017
- Record updated
- Mar 17, 2018
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- ARNP
Reported taxonomies and licenses
363L00000X · Primary
License reported: 9249882 FL
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
607 Highway 466Lady Lake, FL 32159-6338
- Phone
- (352) 259-7994
- Fax
- (352) 259-7994
Mailing address
607 HIGHWAY 466LADY LAKE, FL 321596338
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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