Mark D. Zajkowski, DDS,MD
Oral and Maxillofacial Surgery (Dentist) · South Portland, ME
Mark D. Zajkowski, DDS,MD is an oral and maxillofacial surgery (dentist) with a practice address in South Portland, Maine, and NPI 1366432189, issued on Oct 24, 2005. Check the license (Maine 3563, as entered in NPPES) with the Maine board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mark D. Zajkowski
- Credential
- DDS,MD
- Primary taxonomy
- Oral and Maxillofacial Surgery (Dentist) 1223S0112X
- License number
- 3563 ME
Self-reported in NPPES; status is on the state search - Practice location
- 20 Long Creek Dr, South Portland, ME 04106
- Phone
- (207) 772-4063
- Enumerated
- Oct 24, 2005
- Record last updated
- Apr 9, 2024
- Fax
- (207) 772-8641
- Medicaid ID
- 316710099 ME
- Entity
- Type 1 · individual
8 nearest oral and maxillofacial surgery (dentist) records → All 36 in Maine → Look up another NPI →
Also registered at 20 Long Creek Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Matthew Jacobsen, DMD, MDOral and Maxillofacial Surgery (Dentist)1568453108
- Killian Maccarthy, DMD MDOral and Maxillofacial Surgery (Dentist)1356322531
- David Moyer, DDS,MDOral and Maxillofacial Surgery (Dentist)1881684587
Verify Mark D. Zajkowski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maine board licenses this profession
Search for license 3563Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
13% more Medicare Part D claims than the average oral and maxillofacial surgery (dentist) in 2024
459 Medicare Part D claims for 237 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. 71 claims were for opioids.
Most prescribed
- Amoxicillin206 claims
- Chlorhexidine Gluconate103 claims
- Hydrocodone-Acetaminophen70 claims
- Cefdinir22 claims
- Amoxicillin-Clavulanate Potass16 claims
- Clindamycin Hcl13 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.
Industry payments in 2024: $140.49
3 payments; by number, the most common kind was food and beverage; the largest payer was Straumann USA LLC. The 4,075 providers of this specialty with any payment received $1,077.58 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Mark D. Zajkowski among 36 oral and maxillofacial surgery (dentist) records in Maine
Mark D. Zajkowski, DDS,MD is one of 36 oral and maxillofacial surgery (dentist) records with a practice address in Maine. 64% 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, 78% newer
- In a Medicare fileYes · 64% of these records are
- In the CMS Doctors and Clinicians fileNo · 0% of these records are
- Record last updated2024 · 67% 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 Maine 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 Maine
There are 36 oral and maxillofacial surgery (dentist) records in Maine.
All 36 in Maine → Every provider in South Portland → Oral and Maxillofacial Surgery (Dentist) nationwide →
The 8 oral and maxillofacial surgery (dentist) records with the nearest ZIP codes
- William Benzing, DMDSouth Portland, ME 041061245336866
- David Chubb, BDSSouth Portland, ME 041061518582881
- Richard Crawford, DMDSouth Portland, ME 041061174629794
- Matthew Jacobsen, DMD, MDSouth Portland, ME 041061568453108
- Killian Maccarthy, DMD MDSouth Portland, ME 041061356322531
- David Moyer, DDS,MDSouth Portland, ME 041061881684587
- Robert Schaedel, DMD MDSouth Portland, ME 041061417053034
- Grace Thomas, D.D.S.South Portland, ME 041061588876908
Common questions
What is Mark D. Zajkowski, DDS,MD's NPI number?
Mark D. Zajkowski, DDS,MD's National Provider Identifier (NPI) is 1366432189, issued on Oct 24, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark D. Zajkowski, DDS,MD located?
The NPPES record lists a practice address at 20 Long Creek Dr, South Portland, ME, 04106. Phone: (207) 772-4063. Providers update this record themselves, so call before visiting.
How can I verify Mark D. Zajkowski, DDS,MD's license?
NPPES lists Maine license number 3563, as entered by the provider. Search the Maine board that licenses this profession; the NPPES record confirms identity only.
How much does Mark D. Zajkowski, DDS,MD prescribe under Medicare Part D?
In 2024, Mark D. Zajkowski, DDS,MD had 459 Medicare Part D claims for 237 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.