Maryanne Knasas Irwin, DMD
Endodontics · Boston, MA
Maryanne Knasas Irwin, DMD is an endodontics with a practice address in Boston, Massachusetts, and NPI 1538376165, issued on May 16, 2007. Check the license (Massachusetts 21391, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Maryanne Knasas Irwin
- Credential
- DMD
- Primary taxonomy
- Endodontics 1223E0200X
- License number
- 21391 MA
Self-reported in NPPES; status is on the state search - Practice location
- One Kneeland St, Boston, MA 02111
- Phone
- (617) 636-6796
- Enumerated
- May 16, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest endodontics records → All 276 in Massachusetts → Look up another NPI →
Also registered at One Kneeland St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Erick Gomez MarroquinDentist1487006649
- Paul Marino, DDSOral and Maxillofacial Surgery (Dentist)1861504920
Verify Maryanne Knasas Irwin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license 21391Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
39% fewer Medicare Part D claims than the average endodontics in 2024
74 Medicare Part D claims for 42 beneficiaries, against an average of 121 among the 4,119 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Amoxicillin39 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: $5.34
1 payment: food and beverage; the largest payer was Sonendo Inc. The 2,057 providers of this specialty with any payment received $49,739.86 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.
Maryanne Knasas Irwin among 276 endodontics records in Massachusetts
Maryanne Knasas Irwin, DMD is one of 276 endodontics records with a practice address in Massachusetts. 61% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 40% of them.
- NPI issued2007 · 40% of these records are older, 39% newer
- In a Medicare fileYes · 61% of these records are
- In the CMS Doctors and Clinicians fileNo · 0% of these records are
- Record last updated2007 · 78% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223E0200X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endodontics providers in Massachusetts
There are 276 endodontics records in Massachusetts.
All 276 in Massachusetts → Every provider in Boston → Endodontics nationwide →
The 8 endodontics records with the nearest ZIP codes
- Ayman Aboushala, D.M.D.Boston, MA 021111730244401
- Elinor Alon, DMDBoston, MA 021111073022711
- Samah BukhariBoston, MA 021111871962522
- Cindy CastilloBoston, MA 021111922663400
- Schuyler Deluca, DDSBoston, MA 021111265923460
- Zameera Fida, DMDBoston, MA 021111558523498
- Maria Rachel Figueiredo Penalva Monteiro, DDSBoston, MA 021111285271494
- Marielena Gamboa-Ruiz, DDSBoston, MA 021111194151118
Common questions
What is Maryanne Knasas Irwin, DMD's NPI number?
Maryanne Knasas Irwin, DMD's National Provider Identifier (NPI) is 1538376165, issued on May 16, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Maryanne Knasas Irwin, DMD located?
The NPPES record lists a practice address at One Kneeland St, Boston, MA, 02111. Phone: (617) 636-6796. Providers update this record themselves, so call before visiting.
How can I verify Maryanne Knasas Irwin, DMD's license?
NPPES lists Massachusetts license number 21391, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Maryanne Knasas Irwin, DMD prescribe under Medicare Part D?
In 2024, Maryanne Knasas Irwin, DMD had 74 Medicare Part D claims for 42 beneficiaries; the average among endodontics prescribers was 121. 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.