Christopher J. Castonguay, DMD
Dentist · Millinocket, ME
Christopher J. Castonguay, DMD is a dentist with a practice address in Millinocket, Maine, and NPI 1477046571, issued on Jun 13, 2018. Check the license (Maine DEN4640, as entered in NPPES) with the Maine board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Christopher J. Castonguay
- Credential
- DMD
- Primary taxonomy
- Dentist 122300000X
- License number
- DEN4640 ME
Self-reported in NPPES; status is on the state search - Practice location
- 50 Summer St, Millinocket, ME 04462
- Phone
- (207) 528-2285
- Enumerated
- Jun 13, 2018
- Record last updated
- Jun 13, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (207) 528-2880
- Entity
- Type 1 · individual
8 nearest dentist records → All 390 in Maine → Look up another NPI →
Also registered at 50 Summer St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nancy Bears, IPDHDental Hygienist1003851031
- Laura Bouchard, RNCase Management Registered Nurse1881249779
- Catherine Cesare, DENTAL HYGIENISTDental Hygienist1194968065
- Richard Chin, O.D.Optometrist1053864488
- Robert Cleaveland, PHYSICIAN ASSISTANTMedical Physician Assistant1518350610
- Daphne Davenport, RNRegistered Nurse1467337873
Verify Christopher J. Castonguay in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maine board licenses this profession
Search for license DEN4640Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
40% fewer Medicare Part D claims than the average dentist in 2024
52 Medicare Part D claims for 44 beneficiaries, against an average of 86 among the 51,021 providers of this specialty who prescribed in Part D.
Most prescribed
- Amoxicillin30 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.
Christopher J. Castonguay among 390 dentist records in Maine
Christopher J. Castonguay, DMD is one of 390 dentist records with a practice address in Maine. 58% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 68% of them.
- NPI issued2018 · 68% of these records are older, 28% newer
- In a Medicare fileYes · 58% of these records are
- In the CMS Doctors and Clinicians fileNo · 1% of these records are
- Record last updated2018 · 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 122300000X and a Maine practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dentist providers in Maine
There are 390 dentist records in Maine.
All 390 in Maine → Every provider in Millinocket → Dentist nationwide →
The 8 dentist records with the nearest ZIP codes
- Harrold Thibodeau, DMDLincoln, ME 044571760534325
- Amy Alexcovich, DMDOld Town, ME 044681538323019
- Edward Robertson, DMD,MSIndian Island, ME 044681679570188
- David Miller, DMDOrono, ME 044731033473418
- Patrick Rowe, DDS, MPHOrono, ME 044731649550617
- Randall Cutri, D.M.D.Hampden, ME 044441497779052
- Khanh Doan, DMDHampden, ME 044441932992252
- Emily Gazitua, D.M.D.Hampden, ME 044441285657635
Common questions
What is Christopher J. Castonguay, DMD's NPI number?
Christopher J. Castonguay, DMD's National Provider Identifier (NPI) is 1477046571, issued on Jun 13, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Christopher J. Castonguay, DMD located?
The NPPES record lists a practice address at 50 Summer St, Millinocket, ME, 04462. Phone: (207) 528-2285. Providers update this record themselves, so call before visiting.
How can I verify Christopher J. Castonguay, DMD's license?
NPPES lists Maine license number DEN4640, as entered by the provider. Search the Maine board that licenses this profession; the NPPES record confirms identity only.
How much does Christopher J. Castonguay, DMD prescribe under Medicare Part D?
In 2024, Christopher J. Castonguay, DMD had 52 Medicare Part D claims for 44 beneficiaries; the average among dentist prescribers was 86. 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.