Mark James Johnson, DO
Internal Medicine Physician · Kissimmee, FL
Mark James Johnson, DO is an internal medicine physician with a practice address in Kissimmee, Florida, and NPI 1740783554, issued on Mar 18, 2018. Check the license (Florida OS16811, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.
- Name
- Mark James Johnson
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- OS16811 FL
Self-reported in NPPES; status is on the state search - Practice location
- 806 W Oak St, Kissimmee, FL 34741
- Phone
- (407) 483-3376
- Enumerated
- Mar 18, 2018
- Record last updated
- Jun 22, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (407) 201-7304
- Medicare enrollment
- Enrolled (PECOS I20210714003723); accepts Medicare assignment
- Medical or professional school
- Lake Erie College Of Osteopathic Medicine, Bradenton, 2018
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 10,151 in Florida → Look up another NPI →
Also registered at 806 W Oak St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jomaris Centeno GironaInternal Medicine Physician1427611607
- Christopher Cooper, M.D.Internal Medicine Physician1225455108
- Roger Crouse, MDInternal Medicine Physician1477538197
- Nima Hosseinian, MDInternal Medicine Physician1902365141
Verify Mark James Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersFlorida health license search
Search for license OS16811Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average internal medicine physician in 2024
278 Medicare Part D claims for 70 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium19 claims
- Levothyroxine Sodium12 claims
- Tamsulosin Hcl12 claims
- Lisinopril11 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: $125.15
7 payments; by number, the most common kind was food and beverage; the largest payer was Bayer Healthcare Pharmaceuticals Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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 2 group practices
- Hospital Medicine Services OF FL, LLCLake City, FL
- Osceola Surgical Associates LLCKissimmee, FL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark James Johnson among 10,151 internal medicine physician records in Florida
Mark James Johnson, 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 2018, is newer than 79% of them.
- NPI issued2018 · 79% of these records are older, 18% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated2018 · median 2004 among the 6,606 with a school on file
- Record last updated2021 · 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).
74 internal medicine physician records list a practice address in Kissimmee
They are 74 of the 5,568 NPPES records with a practice address in Kissimmee, and 10,151 internal medicine physician records in Florida.
All 10,151 in Florida → Every provider in Kissimmee → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Fiaz Afzal, MDKissimmee, FL 347411003801044
- Ajaz Afzal, MDKissimmee, FL 347411750341236
- Malathi Akula, M.D.Kissimmee, FL 347411134117120
- Tahsina Atiquzzaman, M.D.Kissimmee, FL 347411730167263
- Pedro Carrazana Perez, M.D.Kissimmee, FL 347411558367243
- Roger Crouse, MDKissimmee, FL 347411477538197
- Sidi Elalaoui, MDKissimmee, FL 347411023044674
- Alberto Garcia-Romeu, M.D.Kissimmee, FL 347411225064728
Common questions
What is Mark James Johnson, DO's NPI number?
Mark James Johnson, DO's National Provider Identifier (NPI) is 1740783554, issued on Mar 18, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Mark James Johnson, DO located?
The NPPES record lists a practice address at 806 W Oak St, Kissimmee, FL, 34741. Phone: (407) 483-3376. Providers update this record themselves, so call before visiting.
How can I verify Mark James Johnson, DO's license?
NPPES lists Florida license number OS16811, 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 Mark James Johnson, DO prescribe under Medicare Part D?
In 2024, Mark James Johnson, DO had 278 Medicare Part D claims for 70 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.