NPPES file of Aug 9, 2026

Karen Leonia Walker, M.D.

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Orlando, FL

Karen Leonia Walker, M.D. is a thoracic surgery (cardiothoracic vascular surgery) physician with a practice address in Orlando, Florida, and NPI 1013208453, issued on Apr 19, 2011. Check the license (Florida ME142884, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1013208453
Name
Karen Leonia Walker
Credential
M.D.
Primary taxonomy
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X
License number
ME142884 FL
Self-reported in NPPES; status is on the state search
Practice location
1222 S Orange Ave, Orlando, FL 32806
Phone
(321) 841-7700
Enumerated
Apr 19, 2011
Record last updated
Feb 18, 2020 (not updated in 6 years: call before relying on the address or phone)
Fax
(321) 841-7799
Medicaid ID
104757600 FL
Medicare enrollment
Enrolled (PECOS I20200110000722); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
Download card Updates feed

8 nearest thoracic surgery (cardiothoracic vascular surgery) physician records → All 468 in Florida → Look up another NPI →

Also registered at 1222 S Orange Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Ali Abbood, MDCardiovascular Disease Physician1750886974
  2. Javier Acevedo, M.D.Clinical Cardiac Electrophysiology Physician1356525596
  3. Elizabeth Agunloye, APRNAdult Health Nurse Practitioner1154107571
  4. Ololade Akintoye, M.D.Pediatric Cardiology Physician1578889721
  5. Kamran Akram, MDCardiovascular Disease Physician1235358557
  6. Alicia Albright, APRNAdult Health Nurse Practitioner1891391538

Verify Karen Leonia Walker in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersFlorida health license search
    Search for license ME142884    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Florida license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Is this page about you? You can ask us to correct, restrict or remove it: how.

70% fewer Medicare Part D claims than the average thoracic surgery (cardiothoracic vascular surgery) physician in 2024

30 Medicare Part D claims for 24 beneficiaries, against an average of 101 among the 2,587 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.

  1. Karen Walker30
  2. Specialty average101

Most prescribed

  1. Mupirocin17 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.

Industry payments in 2024: $11,553.13

44 payments; by number, the most common kind was food and beverage; the largest payer was Medtronic, Inc. The 4,047 providers of this specialty with any payment received $7,828.84 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Karen Walker$11,553
  2. Specialty average$7,829

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

  1. Orlando Health Medical Group IncOrlando, FL

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Karen Leonia Walker among 468 thoracic surgery (cardiothoracic vascular surgery) physician records in Florida

Karen Leonia Walker, M.D. is one of 468 thoracic surgery (cardiothoracic vascular surgery) physician records with a practice address in Florida. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 80% of them.

  • NPI issued2011 · 80% of these records are older, 18% newer
  • In a Medicare fileYes · 82% of these records are
  • In the CMS Doctors and Clinicians fileYes · 67% of these records are
  • Graduated2011 · median 1995 among the 311 with a school on file
  • Record last updated2020 · 45% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208G00000X and a Florida practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician providers in Florida

There are 468 thoracic surgery (cardiothoracic vascular surgery) physician records in Florida.

All 468 in Florida → Every provider in Orlando → Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician nationwide →

The 8 thoracic surgery (cardiothoracic vascular surgery) physician records with the nearest ZIP codes

  1. Kojo Agyabeng-Dadzie, MDOrlando, FL 328061063866390
  2. Kevin Beers, DOOrlando, FL 328061013327535
  3. William Decampli, MDOrlando, FL 328061780632224
  4. Sandeep Gupta, M.D.Orlando, FL 328061831366632
  5. Michael Hanna, M.D.Orlando, FL 328061831450832
  6. Luis Herrera, MDOrlando, FL 328061619930195
  7. Tain-Yen Hsia, MDOrlando, FL 328061104859677
  8. Alan Johnston, MDOrlando, FL 328061083699037

Common questions

What is Karen Leonia Walker, M.D.'s NPI number?

Karen Leonia Walker, M.D.'s National Provider Identifier (NPI) is 1013208453, issued on Apr 19, 2011. An NPI identifies a provider in billing; it is not a license.

Where is Karen Leonia Walker, M.D. located?

The NPPES record lists a practice address at 1222 S Orange Ave, Orlando, FL, 32806. Phone: (321) 841-7700. Providers update this record themselves, so call before visiting.

How can I verify Karen Leonia Walker, M.D.'s license?

NPPES lists Florida license number ME142884, 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 Leonia Walker, M.D. prescribe under Medicare Part D?

In 2024, Karen Leonia Walker, M.D. had 30 Medicare Part D claims for 24 beneficiaries; the average among thoracic surgery (cardiothoracic vascular surgery) physician prescribers was 101. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.