James Clifford Marshall, DO
Internal Medicine Physician · Largo, FL
James Clifford Marshall, DO is an internal medicine physician with a practice address in Largo, Florida, and NPI 1609979228, issued on Sep 7, 2006. Check the license (Florida OS6394, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.
- Name
- James Clifford Marshall
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- OS6394 FL
73941 WI
Self-reported in NPPES; status is on the state search - Practice location
- 13121 Cimarron Cir N, Largo, FL 33774
- Phone
- (727) 776-1446
- Enumerated
- Sep 7, 2006
- Record last updated
- Jun 16, 2026
- Medicaid ID
- 371465900 FL
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 10,151 in Florida → Look up another NPI →
Verify James Clifford Marshall in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersFlorida health license search
Search for license OS6394Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average internal medicine physician in 2024
52 Medicare Part D claims for 13 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 31% of claims.
Most prescribed
- Eliquis14 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.
James Clifford Marshall among 10,151 internal medicine physician records in Florida
James Clifford Marshall, DO 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 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 55% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileNo · 65% of these records are
- Record last updated2026 · 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).
96 internal medicine physician records list a practice address in Largo
They are 96 of the 2,280 NPPES records with a practice address in Largo, and 10,151 internal medicine physician records in Florida.
All 10,151 in Florida → Every provider in Largo → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Leo Choe, DOLargo, FL 337741508175530
- Martin Clemmons, D.O.Largo, FL 337741821378589
- Eric Grosch, MDLargo, FL 337741487867164
- Christopher Halleman, D.O.Largo, FL 337741881999514
- Jennifer Kudelko, D.O.Largo, FL 337741922097955
- Sunil Pokharel, M.D.Largo, FL 337741578753646
- Srinivas Rajendran, D.O.Largo, FL 337741497050132
- Priyadarshini Rao, D.O.Largo, FL 337741396914297
Common questions
What is James Clifford Marshall, DO's NPI number?
James Clifford Marshall, DO's National Provider Identifier (NPI) is 1609979228, issued on Sep 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James Clifford Marshall, DO located?
The NPPES record lists a practice address at 13121 Cimarron Cir N, Largo, FL, 33774. Phone: (727) 776-1446. Providers update this record themselves, so call before visiting.
How can I verify James Clifford Marshall, DO's license?
NPPES lists Florida license number OS6394, 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 James Clifford Marshall, DO prescribe under Medicare Part D?
In 2024, James Clifford Marshall, DO had 52 Medicare Part D claims for 13 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.