Mark Ossi, OD
Optometrist · Leesburg, FL
Mark Ossi, OD is an optometrist with a practice address in Leesburg, Florida, and NPI 1245883297, issued on Jul 18, 2019. Check the license (Florida OPC5696, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.
- Name
- Mark Ossi
- Credential
- OD
- Primary taxonomy
- Optometrist 152W00000X
- License number
- OPC5696 FL
Self-reported in NPPES; status is on the state search - Practice location
- 225 N 1St St, Leesburg, FL 34748
- Phone
- (407) 905-8827
- Enumerated
- Jul 18, 2019
- Record last updated
- Nov 27, 2023
- Fax
- (352) 360-2389
- Medicare enrollment
- Enrolled (PECOS I20200831000795); accepts Medicare assignment
- Medical or professional school
- State University Of New York - State College Optometry, 2019
- Entity
- Type 1 · individual
8 nearest optometrist records → All 3,594 in Florida → Look up another NPI →
Also registered at 225 N 1St St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Paul Capell, PMHNPPsychiatric/Mental Health Nurse Practitioner1083288617
- Patricia Cecil, NPPediatric Nurse Practitioner1588062780
- Mary Cisco, DNP, MBA, MSN, FNP-CFamily Nurse Practitioner1215422068
- Julie Clyatt, ARNPAdult Health Nurse Practitioner1942270418
- Arthur Dalley, MDInternal Medicine Physician1124026810
- William Franks, MDPediatrics Physician1043217003
Verify Mark Ossi in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersFlorida health license search
Search for license OPC5696Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
1% more Medicare Part D claims than the average optometrist in 2024
281 Medicare Part D claims for 43 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 46% of claims.
Most prescribed
- Latanoprost117 claims
- Dorzolamide-Timolol34 claims
- Timolol Maleate30 claims
- Brimonidine Tartrate24 claims
- Dorzolamide Hcl16 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.
Bills Medicare through one group practice
- Community Health Centers, IncLeesburg, FL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Ossi among 3,594 optometrist records in Florida
Mark Ossi, OD is one of 3,594 optometrist records with a practice address in Florida. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 78% of them.
- NPI issued2019 · 78% of these records are older, 20% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 51% of these records are
- Graduated2019 · median 2006 among the 1,833 with a school on file
- Record last updated2023 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 152W00000X and a Florida practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
14 optometrist records list a practice address in Leesburg
They are 14 of the 1,063 NPPES records with a practice address in Leesburg, and 3,594 optometrist records in Florida.
All 3,594 in Florida → Every provider in Leesburg → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- James Berry, O.D., P.A.Leesburg, FL 347481033390190
- Albert Ducharme, O.D.Leesburg, FL 347481033151394
- Esterina Elqeni, ODLeesburg, FL 347481508751223
- Sierra Logan, ODLeesburg, FL 347481831877406
- Van Mattison, ODLeesburg, FL 347481912492919
- Margarita Paterson, ODLeesburg, FL 347481346235512
- Donald Ragan, O.D.Leesburg, FL 347481457703050
- Robert Simon, ODLeesburg, FL 347481093825556
Common questions
What is Mark Ossi, OD's NPI number?
Mark Ossi, OD's National Provider Identifier (NPI) is 1245883297, issued on Jul 18, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Mark Ossi, OD located?
The NPPES record lists a practice address at 225 N 1St St, Leesburg, FL, 34748. Phone: (407) 905-8827. Providers update this record themselves, so call before visiting.
How can I verify Mark Ossi, OD's license?
NPPES lists Florida license number OPC5696, 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 Ossi, OD prescribe under Medicare Part D?
In 2024, Mark Ossi, OD had 281 Medicare Part D claims for 43 beneficiaries; the average among optometrist prescribers was 277. 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.