Dr. Constantine Vlassopoulos , DDS
Dentist - General Practice • Kittery, ME
12 Newmarch St
Kittery, ME 039041619
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Dr. Constantine Vlassopoulos is listed in NPPES under Dentist - General Practice.
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NPI assigned on May 25, 2016; this date does not establish years in practice.
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Published CMS data list 36 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Amoxicillin-Clavulanate Potass (Amoxicillin/Potassium Clav) — 19 prescription fills, including refills.
- Methylprednisolone — 17 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table · Guide: How to read Medicare Part D prescriber data
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Close to the middle for Part D prescriptions among clinicians listed under Dentist - General Practice in Maine (2024, 232 clinicians with data). Median for this group: 34. Middle half: 20 to 67.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 127 in 2020 to 36 in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2020–2024.
Practice Location & Contact Primary Location
12 Newmarch St
Kittery, ME 039041619
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in Millinocket, ME. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
Columbia University College Of Dental Medicine
1992
What Public CMS Data Show
Dentist - General Practice: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
36 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$281 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.
Open Payments general payments, program year 2024
All general payments: $111.77 across 2 records.
By nature of payment
- Food and Beverage: $62.50 across 1 record.
- Entertainment: $49.27 across 1 record.
Reporting-company totals
- Envista Holdings Corporation: $62.50 across 1 record.
- Keystone Dental Inc.: $49.27 across 1 record.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2024 (published June 30, 2026).
Years since graduation
34 years (graduated 1992)
CMS Doctors and Clinicians data list 1992 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2016
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
May accept Medicare assignment
CMS data show this clinician may accept Medicare assignment. Clinicians who do not always accept assignment can decide case by case.
Ask the office before your visit. If a clinician does not accept assignment for a service, they can charge up to 15% more than the Medicare-approved amount, and you may be asked to pay the full amount at the visit.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Vlassopoulos has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Vlassopoulos as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Kittery and Maine
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
Close to the middle for clinicians listed under Dentist - General Practice in Maine (2024, 232 clinicians with data). Median for this group: 34. Middle half: 20 to 67.
Too few clinicians listed under Dentist - General Practice in Kittery have Medicare Part D data for 2024 to compare.
Part D drug cost
A higher Part D drug cost than 80% of clinicians listed under Dentist - General Practice in Maine (2024, 232 clinicians with data). Median for this group: $90. Middle half: $50 to $209.
Too few clinicians listed under Dentist - General Practice in Kittery have Medicare Part D data for 2024 to compare.
7 active clinicians are listed under Dentist - General Practice with a practice address in Kittery, ME (519 in Maine).
Addresses are self-reported to NPPES and may be out of date.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 72% from 127 in 2020 to 36 in 2024.
- 2020: 127
- 2021: 233
- 2022: 243
- 2023: 31
- 2024: 36
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30-day fills
30-day fills decreased 72% from 127 in 2020 to 36 in 2024.
- 2020: 127
- 2021: 255
- 2022: 258
- 2023: 31
- 2024: 36
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Part D drug cost
Part D drug cost decreased 79% from $1,334 in 2020 to $281 in 2024.
- 2020: $1,334
- 2021: $1,626
- 2022: $1,791
- 2023: $210
- 2024: $281
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $127.48 in 2022 to $111.77 in 2024.
- 2022: $127.48
- 2023: $23.63
- 2024: $111.77
Sources: CMS Medicare Part D Prescribers (2024), CMS Open Payments (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2024 (payments made January 1 – December 31, 2024): fewer than 11 records totaling $111.77.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Envista Holdings Corporation |
Food and Beverage
In-kind items and services
|
OPTIBOND SOLO PLUS | General | $62.50 |
| Keystone Dental Inc. |
Entertainment
Cash or cash equivalent
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— | General | $49.27 |
Source: CMS Open Payments, program year 2024, released June 30, 2026.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Amoxicillin-Clavulanate Potass | Amoxicillin/Potassium Clav | 19 | 133 | $173.78 | 17 |
| Methylprednisolone | Methylprednisolone | 17 | 102 | $106.85 | 16 |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2026-02-27NUCC Taxonomy Code: 1223G0001X
A general dentist is the primary dental care provider for patients of all ages. The general dentist is responsible for the diagnosis, treatment, management and overall coordination of services related to patients' oral health needs.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - DENTIST
I20260212004312
ME
3577043249
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Secondary Practice Locations
50 Summer St
Millinocket, ME 044621400
Phone: 2075383700
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Dentist - General Practice
Doctor of Dental Medicine
Dentist
Doctor of Dental Medicine
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 12 NEWMARCH ST, KITTERY, ME 039041619 (Tel: 2073059141)
NPI status registered as active in NPPES database
Registered at 11 WINNERS CIR, ASPEN DENTAL, TOPSHAM, ME 040861727 (Tel: 2077251755)
Registered at 17 KERASOUNTOS STREET, ATHENS, ATTICA 11528 (Tel: 3012107773423)
Recorded as CONSTANTINE VLASSOPOULOS, DDS
Dentist (license number reported to NPPES: ME DEN4471)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Mailing Address
17 Kerasountos Street
Athens, ATTICA 11528
Phone: 3012107773423