Frederick John Grassin, D.D.S.
Endodontics · New Port Richey, FL
Frederick John Grassin, D.D.S. is an endodontics with a practice address in New Port Richey, Florida, and NPI 1831311802, issued on May 2, 2007. Check the license (Florida DN14860, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.
- Name
- Frederick John Grassin
- Credential
- D.D.S.
- Primary taxonomy
- Endodontics 1223E0200X
- License number
- DN14860 FL
Self-reported in NPPES; status is on the state search - Practice location
- 5347 Main Street, New Port Richey, FL 34652
- Phone
- (727) 841-9800
- Enumerated
- May 2, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (727) 848-4768
- Entity
- Type 1 · individual
8 nearest endodontics records → All 510 in Florida → Look up another NPI →
Also registered at 5347 Main Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Neria Hebbar, MDSurgery Physician1255420386
Verify Frederick John Grassin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersFlorida health license search
Search for license DN14860Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5.1 times the Medicare Part D claims of the average endodontics in 2024
613 Medicare Part D claims for 346 beneficiaries, against an average of 121 among the 4,119 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Ibuprofen181 claims
- Amoxicillin158 claims
- Amoxicillin-Clavulanate Potass92 claims
- Clindamycin Hcl47 claims
- Methylprednisolone41 claims
- Lorazepam30 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.
Frederick John Grassin among 510 endodontics records in Florida
Frederick John Grassin, D.D.S. is one of 510 endodontics records with a practice address in Florida. 74% 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 26% of them.
- NPI issued2007 · 26% of these records are older, 44% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileNo · 0% of these records are
- Record last updated2007 · 72% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223E0200X and a Florida practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endodontics providers in Florida
There are 510 endodontics records in Florida.
All 510 in Florida → Every provider in New Port Richey → Endodontics nationwide →
The 8 endodontics records with the nearest ZIP codes
- Garland Forbes, D.M.D.,M.SNew Port Richey, FL 346521497892517
- Barbara Morgan, D.M.D.,P.A.New Port Richey, FL 346521902930563
- Randy Griffin, DMDPalm Harbor, FL 346841770641797
- Robert Uhle, DDSPalm Harbor, FL 346841831220599
- Hanny Hamoui, D.M.DBrooksville, FL 346131326471988
- Francisco Gari, D.D.S.Spring Hill, FL 346061902257678
- Robert Heydrich, D.M.D., M.S.Spring Hill, FL 346061780790329
- Clayton Travis, DMD MDSSpring Hill, FL 346061376339093
Common questions
What is Frederick John Grassin, D.D.S.'s NPI number?
Frederick John Grassin, D.D.S.'s National Provider Identifier (NPI) is 1831311802, issued on May 2, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Frederick John Grassin, D.D.S. located?
The NPPES record lists a practice address at 5347 Main Street, New Port Richey, FL, 34652. Phone: (727) 841-9800. Providers update this record themselves, so call before visiting.
How can I verify Frederick John Grassin, D.D.S.'s license?
NPPES lists Florida license number DN14860, 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 Frederick John Grassin, D.D.S. prescribe under Medicare Part D?
In 2024, Frederick John Grassin, D.D.S. had 613 Medicare Part D claims for 346 beneficiaries; the average among endodontics prescribers was 121. 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.