Tassos John Sfondouris, DDS,MS
Periodontics · Severna Park, MD
Tassos John Sfondouris, DDS,MS is a periodontics with a practice address in Severna Park, Maryland, and NPI 1013220524, issued on Jul 26, 2010. Check the license (Maryland 14161, as entered in NPPES) with the Maryland board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Tassos John Sfondouris
- Credential
- DDS,MS
- Primary taxonomy
- Periodontics 1223P0300X
- License number
- 14161 MD
Self-reported in NPPES; status is on the state search - Practice location
- 900 Ritchie Hwy, Severna Park, MD 21146
- Phone
- (410) 647-0200
- Enumerated
- Jul 26, 2010
- Record last updated
- Jul 26, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (410) 315-8456
- Entity
- Type 1 · individual
8 nearest periodontics records → All 167 in Maryland → Look up another NPI →
Also registered at 900 Ritchie Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Richard Gartner, D.D.S.Periodontics1417071416
- Jean Jacklin, CRNPFamily Nurse Practitioner1043665094
- Maya Vernon, D.D.S.Pediatric Dentistry1154449098
Verify Tassos John Sfondouris in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this profession
Search for license 14161Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
24% more Medicare Part D claims than the average periodontics in 2024
343 Medicare Part D claims for 124 beneficiaries, against an average of 277 among the 4,191 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Amoxicillin135 claims
- Ibuprofen90 claims
- Methylprednisolone30 claims
- Azithromycin27 claims
- Sodium Fluoride13 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: $57.97
1 payment: food and beverage; the largest payer was Solventum Corporation. The 2,966 providers of this specialty with any payment received $1,338.41 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.
Tassos John Sfondouris among 167 periodontics records in Maryland
Tassos John Sfondouris, DDS,MS is one of 167 periodontics records with a practice address in Maryland. 65% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 68% of them.
- NPI issued2010 · 68% of these records are older, 28% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2010 · 74% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223P0300X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Periodontics providers in Maryland
There are 167 periodontics records in Maryland.
All 167 in Maryland → Every provider in Severna Park → Periodontics nationwide →
The 8 periodontics records with the nearest ZIP codes
- Richard Gartner, D.D.S.Severna Park, MD 211461417071416
- Justin KleinmanWestminster, MD 211571174676340
- Howard ShockettWestminster, MD 211571366580904
- Arnold Sindler, DDSWestminster, MD 211571386761005
- Avery Wilson, DMDWestminster, MD 211571568084663
- John Spitznagel, D.D.S., PH.D.Parkton, MD 211201255500807
- Peter Joseph, D.M.D.Owings Mills, MD 211171366739278
- Daniel Karlin, D.D.S.Owings Mills, MD 211171336252162
Common questions
What is Tassos John Sfondouris, DDS,MS's NPI number?
Tassos John Sfondouris, DDS,MS's National Provider Identifier (NPI) is 1013220524, issued on Jul 26, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Tassos John Sfondouris, DDS,MS located?
The NPPES record lists a practice address at 900 Ritchie Hwy, Severna Park, MD, 21146. Phone: (410) 647-0200. Providers update this record themselves, so call before visiting.
How can I verify Tassos John Sfondouris, DDS,MS's license?
NPPES lists Maryland license number 14161, as entered by the provider. Search the Maryland board that licenses this profession; the NPPES record confirms identity only.
How much does Tassos John Sfondouris, DDS,MS prescribe under Medicare Part D?
In 2024, Tassos John Sfondouris, DDS,MS had 343 Medicare Part D claims for 124 beneficiaries; the average among periodontics prescribers was 277. 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.