Mark L. Ritch, D.O.
Neurology Physician · Largo, FL
Mark L. Ritch, D.O. is a neurology physician with a practice address in Largo, Florida, and NPI 1659313732, issued on Jun 12, 2006. Check the license (Florida OS0006566, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.
- Name
- Mark L. Ritch
- Credential
- D.O.
- Primary taxonomy
- Neurology Physician 2084N0400X
- License number
- OS0006566 FL
Self-reported in NPPES; status is on the state search - Practice location
- 1000 Belcher RD S, Largo, FL 33771
- Phone
- (727) 209-2662
- Enumerated
- Jun 12, 2006
- Record last updated
- Dec 12, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (727) 209-2665
- Medicaid ID
- 373750100 FL
- Medicare enrollment
- Enrolled (PECOS I20040804001624); accepts Medicare assignment
- Medical or professional school
- Nova Southeastern College Of Osteo Medicine, 1988
- Entity
- Type 1 · individual
8 nearest neurology physician records → All 1,530 in Florida → Look up another NPI →
Also registered at 1000 Belcher RD S
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Valerie Smith, D.P.M.Primary Podiatric Medicine Podiatrist1255330627
Verify Mark L. Ritch in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersFlorida health license search
Search for license OS0006566Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through 2 group practices
- Onyx Neurodiagnostic LLCHouston, TX
- Oversite NeuroLindale, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark L. Ritch among 1,530 neurology physician records in Florida
Mark L. Ritch, D.O. is one of 1,530 neurology physician records with a practice address in Florida. 88% 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 11% of them.
- NPI issued2006 · 11% of these records are older, 58% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 75% of these records are
- Graduated1988 · median 2005 among the 1,149 with a school on file
- Record last updated2016 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084N0400X and a Florida practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Neurology Physician providers in Florida
There are 1,530 neurology physician records in Florida.
All 1,530 in Florida → Every provider in Largo → Neurology Physician nationwide →
The 8 neurology physician records with the nearest ZIP codes
- Adam Didio, MDLargo, FL 337701649298985
- Robert Goldstein, MDLargo, FL 337701346248614
- William Greenberg, MDLargo, FL 337701629052733
- William Hulley, DOLargo, FL 337701801844709
- Valerie Lasko, M.D.Largo, FL 337701205840311
- Adam RhodesLargo, FL 337701093455891
- Matthew Ritch, D.O.Largo, FL 337701619339082
- Douglas Terzigni, D.O.Largo, FL 337701407823537
Common questions
What is Mark L. Ritch, D.O.'s NPI number?
Mark L. Ritch, D.O.'s National Provider Identifier (NPI) is 1659313732, issued on Jun 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark L. Ritch, D.O. located?
The NPPES record lists a practice address at 1000 Belcher RD S, Largo, FL, 33771. Phone: (727) 209-2662. Providers update this record themselves, so call before visiting.
How can I verify Mark L. Ritch, D.O.'s license?
NPPES lists Florida license number OS0006566, 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.
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.