Jonathan Walton Marsh, MD
Internal Medicine Physician · Naples, FL
Jonathan Walton Marsh, MD is an internal medicine physician with a practice address in Naples, Florida, and NPI 1275795528, issued on Jun 27, 2008. Check the license (Florida ME113346, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.
- Name
- Jonathan Walton Marsh
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- ME113346 FL
LL 30910 SC
MD30910 SC
Self-reported in NPPES; status is on the state search - Practice location
- 2338 Immokalee RD, Naples, FL 34110
- Phone
- (239) 330-2933
- Enumerated
- Jun 27, 2008
- Record last updated
- Aug 12, 2025
- Medicare enrollment
- Enrolled (PECOS I20120921000339); accepts Medicare assignment
- Medical or professional school
- Medical University Of South Carolina College Of Medicine, 2008
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 10,151 in Florida → Look up another NPI →
Also registered at 2338 Immokalee RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Merilyne Francois, DNP,APRN,FNP BCFamily Nurse Practitioner1255066882
- Kevin Nesh, M.D.Hospitalist Physician1407116858
Verify Jonathan Walton Marsh in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersFlorida health license search
Search for license ME113346Check 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 internal medicine physician in 2024
204 Medicare Part D claims for 18 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Duloxetine Hcl12 claims
- Ozempic12 claims
- Repatha Sureclick12 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): 81.4 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
- Naples Concierge HealthcareNaples, FL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jonathan Walton Marsh among 10,151 internal medicine physician records in Florida
Jonathan Walton Marsh, MD is one of 10,151 internal medicine physician records with a practice address in Florida. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 52% of them.
- NPI issued2008 · 52% of these records are older, 44% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated2008 · median 2004 among the 6,606 with a school on file
- Record last updated2025 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Florida practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
208 internal medicine physician records list a practice address in Naples
They are 208 of the 5,950 NPPES records with a practice address in Naples, and 10,151 internal medicine physician records in Florida.
All 10,151 in Florida → Every provider in Naples → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jeffrey Allen, M.D.Naples, FL 341101841451994
- Charles Anderson, MDNaples, FL 341101245282797
- Jose Baez, M.D.Naples, FL 341101235218397
- Eugene Finan, M.D.Naples, FL 341101447283163
- William Grubbs, MDNaples, FL 341101568533644
- Paul Hobaica, MDNaples, FL 341101730102609
- Linell King, MDNaples, FL 341101558395442
- Mary Ann Lomonaco, MDNaples, FL 341101457308199
Common questions
What is Jonathan Walton Marsh, MD's NPI number?
Jonathan Walton Marsh, MD's National Provider Identifier (NPI) is 1275795528, issued on Jun 27, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Jonathan Walton Marsh, MD located?
The NPPES record lists a practice address at 2338 Immokalee RD, Naples, FL, 34110. Phone: (239) 330-2933. Providers update this record themselves, so call before visiting.
How can I verify Jonathan Walton Marsh, MD's license?
NPPES lists Florida license number ME113346, 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 Jonathan Walton Marsh, MD prescribe under Medicare Part D?
In 2024, Jonathan Walton Marsh, MD had 204 Medicare Part D claims for 18 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Jonathan Walton Marsh, MD's MIPS final score?
The 2023 MIPS final score is 81.4 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.