Gregory John Keiser, DMD
Oral and Maxillofacial Surgery (Dentist) · Morristown, NJ
Gregory John Keiser, DMD is an oral and maxillofacial surgery (dentist) with a practice address in Morristown, New Jersey, and NPI 1306801006, issued on Apr 18, 2006. Check the license (New Jersey 16833, as entered in NPPES) with the New Jersey board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Gregory John Keiser
- Credential
- DMD
- Primary taxonomy
- Oral and Maxillofacial Surgery (Dentist) 1223S0112X
- License numbers
- 16833 NJ
DS026629L PA
Self-reported in NPPES; status is on the state search - Practice location
- 290 Madison Avenue, Morristown, NJ 07960
- Phone
- (973) 538-5338
- Enumerated
- Apr 18, 2006
- Record last updated
- Aug 23, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (973) 538-5343
- Entity
- Type 1 · individual
8 nearest oral and maxillofacial surgery (dentist) records → All 296 in New Jersey → Look up another NPI →
Also registered at 290 Madison Avenue
A shared address usually means a shared clinic or building; it does not show who employs whom.
- John Galdieri, D.D.S.General Practice Dentistry1962622399
- John Galdieri, D.M.D.General Practice Dentistry1346460771
Verify Gregory John Keiser in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich New Jersey board licenses this profession
Search for license 16833Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
52% fewer Medicare Part D claims than the average oral and maxillofacial surgery (dentist) in 2024
195 Medicare Part D claims for 87 beneficiaries, against an average of 406 among the 5,870 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 36 claims were for opioids.
Most prescribed
- Amoxicillin64 claims
- Ibuprofen45 claims
- Acetaminophen-Codeine25 claims
- Clindamycin Hcl18 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.
Gregory John Keiser among 296 oral and maxillofacial surgery (dentist) records in New Jersey
Gregory John Keiser, DMD is one of 296 oral and maxillofacial surgery (dentist) records with a practice address in New Jersey. 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 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 48% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 15% of these records are
- Record last updated2019 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223S0112X and a New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Oral and Maxillofacial Surgery (Dentist) providers in New Jersey
There are 296 oral and maxillofacial surgery (dentist) records in New Jersey.
All 296 in New Jersey → Every provider in Morristown → Oral and Maxillofacial Surgery (Dentist) nationwide →
The 8 oral and maxillofacial surgery (dentist) records with the nearest ZIP codes
- James Fang, D.D.SMorristown, NJ 079601689744088
- Mohamed Ali Boukheir, DMDMadison, NJ 079401518351964
- Gregg Jacob, D.M.D.Florham Park, NJ 079321164540233
- Gerard Begley, DMDChester, NJ 079301902920689
- Richard Riva, DDSChatham, NJ 079281538292958
- Mark Durante, D.D.S.Berkeley Heights, NJ 079221215158076
- Allison Derenzi, DDSBasking Ridge, NJ 079201649895863
- Prakhar Mehrotra, DDS, MDBasking Ridge, NJ 079201740624121
Common questions
What is Gregory John Keiser, DMD's NPI number?
Gregory John Keiser, DMD's National Provider Identifier (NPI) is 1306801006, issued on Apr 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory John Keiser, DMD located?
The NPPES record lists a practice address at 290 Madison Avenue, Morristown, NJ, 07960. Phone: (973) 538-5338. Providers update this record themselves, so call before visiting.
How can I verify Gregory John Keiser, DMD's license?
NPPES lists New Jersey license number 16833, as entered by the provider. Search the New Jersey board that licenses this profession; the NPPES record confirms identity only.
How much does Gregory John Keiser, DMD prescribe under Medicare Part D?
In 2024, Gregory John Keiser, DMD had 195 Medicare Part D claims for 87 beneficiaries; the average among oral and maxillofacial surgery (dentist) prescribers was 406. 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.