Mark Carl Williams, M.D.
Maternal & Fetal Medicine Physician · Fort Myers, FL
Mark Carl Williams, M.D. is a maternal & fetal medicine physician with a practice address in Fort Myers, Florida, and NPI 1932183951, issued on Dec 2, 2005. Check the license (Florida ME50517, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.
- Name
- Mark Carl Williams
- Credential
- M.D.
- Primary taxonomy
- Maternal & Fetal Medicine Physician 207VM0101X
- License number
- ME50517 FL
Self-reported in NPPES; status is on the state search - Practice location
- 9981 Healthpark Circle, Fort Myers, FL 33908
- Phone
- (239) 481-5477
- Enumerated
- Dec 2, 2005
- Record last updated
- Sep 8, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (239) 481-5892
- Medicaid ID
- 046651400 FL
- Medicare enrollment
- Enrolled (PECOS I20040301001115); accepts Medicare assignment
- Medical or professional school
- University Of Minnesota Medical School, 1981
- Entity
- Type 1 · individual
8 nearest maternal & fetal medicine physician records → All 182 in Florida → Look up another NPI →
Verify Mark Carl Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersFlorida health license search
Search for license ME50517Check 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 one group practice
- Pediatrix Medical Group OF Florida IncMiramar, FL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Carl Williams among 182 maternal & fetal medicine physician records in Florida
Mark Carl Williams, M.D. is one of 182 maternal & fetal medicine physician records with a practice address in Florida. 77% 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, 86% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1981 · median 2002 among the 121 with a school on file
- Record last updated2010 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207VM0101X and a Florida practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Maternal & Fetal Medicine Physician providers in Florida
There are 182 maternal & fetal medicine physician records in Florida.
All 182 in Florida → Every provider in Fort Myers → Maternal & Fetal Medicine Physician nationwide →
The 8 maternal & fetal medicine physician records with the nearest ZIP codes
- William O'Brien, M.D.Fort Myers, FL 339081700860558
- Edna Porter, MDFort Myers, FL 339081720027535
- Judith Krammer, M.D.Fort Myers, FL 339191780672527
- Katherine Apostolakis-Kyrus, M.D.St Petersburg, FL 337011528358397
- Mayra Cruz Ithier, M.S, M.D.St Petersburg, FL 337011619263027
- Insaf KoubaSt Petersburg, FL 337011710364864
- Raul Montenegro, M.D.St Petersburg, FL 337011245260637
- Jose Prieto, M.D.St Petersburg, FL 337011376573782
Common questions
What is Mark Carl Williams, M.D.'s NPI number?
Mark Carl Williams, M.D.'s National Provider Identifier (NPI) is 1932183951, issued on Dec 2, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark Carl Williams, M.D. located?
The NPPES record lists a practice address at 9981 Healthpark Circle, Fort Myers, FL, 33908. Phone: (239) 481-5477. Providers update this record themselves, so call before visiting.
How can I verify Mark Carl Williams, M.D.'s license?
NPPES lists Florida license number ME50517, 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.