Karen Kelso Walker, APRN, PMHNP-BC
Psychiatric/Mental Health Nurse Practitioner · Oviedo, FL
Karen Kelso Walker, APRN, PMHNP-BC is a psychiatric/mental health nurse practitioner with a practice address in Oviedo, Florida, and NPI 1538703392, issued on Nov 4, 2019. Check the license (Florida APRN11016676, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.
- Name
- Karen Kelso Walker
- Credential
- APRN, PMHNP-BC
- Primary taxonomy
- Psychiatric/Mental Health Nurse Practitioner 363LP0808X
- License numbers
- APRN11016676 FL
RN9224976 FL
Self-reported in NPPES; status is on the state search - Practice location
- 8400 Red Bug Lake RD Ste 2080, Oviedo, FL 32765
- Phone
- (833) 769-3524
- Enumerated
- Nov 4, 2019
- Record last updated
- Dec 30, 2025
- Fax
- (321) 348-9984
- Medicaid ID
- 112936800 FL
- Medicare enrollment
- Enrolled (PECOS I20220125000296); 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 8400 Red Bug Lake RD Ste 2080
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Karen Kelso Walker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersFlorida health license search
Search for license APRN11016676Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average psychiatric/mental health nurse practitioner in 2024
52 Medicare Part D claims for 13 beneficiaries, against an average of 906 among the 30,717 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.
Industry payments in 2024: $115.37
1 payment: food and beverage; the largest payer was Teva Pharmaceuticals USA, Inc. The 23,362 providers of this specialty with any payment received $1,027.77 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 one group practice
- Personal Recovery Network LLCOviedo, FL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karen Kelso Walker among 4,715 psychiatric/mental health nurse practitioner records in Florida
Karen Kelso Walker, APRN, PMHNP-BC 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 2019, is newer than 33% of them.
- NPI issued2019 · 33% of these records are older, 62% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 56% of these records are
- Graduated2021 · median 2021 among the 2,622 with a school on file
- Record last updated2025 · 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).
16 psychiatric/mental health nurse practitioner records list a practice address in Oviedo
They are 16 of the 1,250 NPPES records with a practice address in Oviedo, and 4,715 psychiatric/mental health nurse practitioner records in Florida.
All 4,715 in Florida → Every provider in Oviedo → Psychiatric/Mental Health Nurse Practitioner nationwide →
The 8 psychiatric/mental health nurse practitioner records with the nearest ZIP codes
- Love Bamisile, NPOviedo, FL 327651740987197
- George Cannon, APRN, PMHNP-BCOviedo, FL 327651619761921
- Marie Del Rio, PMHNP-BCOviedo, FL 327651912769183
- Kelly HannahanOviedo, FL 327651619606233
- Aaron HubaOviedo, FL 327651073497590
- Kevin Kearney, APRNOviedo, FL 327651700915899
- Mae Mallaney, APRNOviedo, FL 327651992002034
- Shannon Meyers, APRN, DNPOviedo, FL 327651174923585
Common questions
What is Karen Kelso Walker, APRN, PMHNP-BC's NPI number?
Karen Kelso Walker, APRN, PMHNP-BC's National Provider Identifier (NPI) is 1538703392, issued on Nov 4, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Karen Kelso Walker, APRN, PMHNP-BC located?
The NPPES record lists a practice address at 8400 Red Bug Lake RD Ste 2080, Oviedo, FL, 32765. Phone: (833) 769-3524. Providers update this record themselves, so call before visiting.
How can I verify Karen Kelso Walker, APRN, PMHNP-BC's license?
NPPES lists Florida license number APRN11016676, 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 Kelso Walker, APRN, PMHNP-BC prescribe under Medicare Part D?
In 2024, Karen Kelso Walker, APRN, PMHNP-BC had 52 Medicare Part D claims for 13 beneficiaries; the average among psychiatric/mental health nurse practitioner prescribers was 906. 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.