Charles Posternack, M.D.
Gastroenterology Physician · Atlantis, FL
Charles Posternack, M.D. is a gastroenterology physician with a practice address in Atlantis, Florida, and NPI 1669595997, issued on Apr 10, 2007. Check the license (Florida ME59045, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.
- Name
- Charles Posternack
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- ME59045 FL
Self-reported in NPPES; status is on the state search - Practice location
- 5301 S Congress Ave, Atlantis, FL 33462
- Phone
- (561) 548-3942
- Enumerated
- Apr 10, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (561) 548-3699
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 1,513 in Florida → Look up another NPI →
Also registered at 5301 S Congress Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Charles Posternack in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersFlorida health license search
Search for license ME59045Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average gastroenterology physician in 2024
12 Medicare Part D claims, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Charles Posternack among 1,513 gastroenterology physician records in Florida
Charles Posternack, 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 2007, is newer than 55% of them.
- NPI issued2007 · 55% of these records are older, 37% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileNo · 76% of these records are
- 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).
16 gastroenterology physician records list a practice address in Atlantis
They are 16 of the 574 NPPES records with a practice address in Atlantis, and 1,513 gastroenterology physician records in Florida.
All 1,513 in Florida → Every provider in Atlantis → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Yakov Gitin, MDAtlantis, FL 334621194742015
- Lyle Hurwitz, MDAtlantis, FL 334621467491977
- Carlos Leon, MDAtlantis, FL 334621982694030
- Augusto Lopez-Torres, MDAtlantis, FL 334621578579223
- Miles Medrano, MDAtlantis, FL 334621366487514
- Richard Merzer, MDAtlantis, FL 334621346211422
- Kayode Olowe, M.D.Atlantis, FL 334621427246628
- Thomas Rosenfield, MDAtlantis, FL 334621770539850
Common questions
What is Charles Posternack, M.D.'s NPI number?
Charles Posternack, M.D.'s National Provider Identifier (NPI) is 1669595997, issued on Apr 10, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Charles Posternack, M.D. located?
The NPPES record lists a practice address at 5301 S Congress Ave, Atlantis, FL, 33462. Phone: (561) 548-3942. Providers update this record themselves, so call before visiting.
How can I verify Charles Posternack, M.D.'s license?
NPPES lists Florida license number ME59045, 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 Charles Posternack, M.D. prescribe under Medicare Part D?
In 2024, Charles Posternack, M.D. had 12 Medicare Part D claims; 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.