Johannes Karl Martensson, M.D.
Gastroenterology Physician · Inverness, FL
Johannes Karl Martensson, M.D. is a gastroenterology physician with a practice address in Inverness, Florida, and NPI 1417954298, issued on Jul 7, 2005. Check the license (Florida ME71187, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.
- Name
- Johannes Karl Martensson
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- ME71187 FL
Self-reported in NPPES; status is on the state search - Practice location
- 3653 E Forest Dr, Inverness, FL 34453
- Phone
- (352) 344-8080
- Enumerated
- Jul 7, 2005
- Record last updated
- Sep 5, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (352) 344-0631
- Medicare enrollment
- Enrolled (PECOS I20100415000980); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 1,513 in Florida → Look up another NPI →
Verify Johannes Karl Martensson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersFlorida health license search
Search for license ME71187Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
20% fewer Medicare Part D claims than the average gastroenterology physician in 2024
652 Medicare Part D claims for 176 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Famotidine131 claims
- Pantoprazole Sodium96 claims
- Omeprazole72 claims
- Linzess52 claims
- Metoclopramide Hcl40 claims
- Dicyclomine Hcl31 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: $72.03
4 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 13,350 providers of this specialty with any payment received $5,015.95 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.
Johannes Karl Martensson among 1,513 gastroenterology physician records in Florida
Johannes Karl Martensson, M.D. is one of 1,513 gastroenterology physician records with a practice address in Florida. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 83% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated1975 · median 2000 among the 1,156 with a school on file
- Record last updated2007 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Florida practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Florida
There are 1,513 gastroenterology physician records in Florida.
All 1,513 in Florida → Every provider in Inverness → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Chandur Bhan, MDInverness, FL 344521215589122
- Ahmad Al Nakshabandi, M.DOcala, FL 344711346691383
- Robert Barish, M.D.Ocala, FL 344711538197165
- Cristhine Stephanie Chagas Pastorini, M.D.Ocala, FL 344711942527031
- Diego Colom Steele, MDOcala, FL 344711760800403
- Robert McClary, M.D.Ocala, FL 344711861420325
- Henry Olejeme, M.D.Ocala, FL 344711598777682
- Miguel Ramos, M.D.Ocala, FL 344711669400859
Common questions
What is Johannes Karl Martensson, M.D.'s NPI number?
Johannes Karl Martensson, M.D.'s National Provider Identifier (NPI) is 1417954298, issued on Jul 7, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Johannes Karl Martensson, M.D. located?
The NPPES record lists a practice address at 3653 E Forest Dr, Inverness, FL, 34453. Phone: (352) 344-8080. Providers update this record themselves, so call before visiting.
How can I verify Johannes Karl Martensson, M.D.'s license?
NPPES lists Florida license number ME71187, 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 Johannes Karl Martensson, M.D. prescribe under Medicare Part D?
In 2024, Johannes Karl Martensson, M.D. had 652 Medicare Part D claims for 176 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.