Eric James Castenson, D.D.S.
General Practice Dentistry · Amherst, MA
Eric James Castenson, D.D.S. is a general practice dentistry with a practice address in Amherst, Massachusetts, and NPI 1710290903, issued on Jul 16, 2010. Check the license (Massachusetts DN1855884, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Eric James Castenson
- Credential
- D.D.S.
- Primary taxonomy
- General Practice Dentistry 1223G0001X
- License numbers
- DN1855884 MA
0025734 TX
Self-reported in NPPES; status is on the state search - Practice location
- 148 Amity St, Amherst, MA 01002
- Phone
- (413) 549-8100
- Enumerated
- Jul 16, 2010
- Record last updated
- Jan 13, 2012 (not updated in 14 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest general practice dentistry records → All 3,489 in Massachusetts → Look up another NPI →
Also registered at 148 Amity St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- James Hunt, D.D.S.General Practice Dentistry1982638797
- Victor Ivancev, DMDDentist1417395229
- David Piech, D.M.D.General Practice Dentistry1134153026
Verify Eric James Castenson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license DN1855884Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
31% fewer Medicare Part D claims than the average general practice dentistry in 2024
57 Medicare Part D claims for 43 beneficiaries, against an average of 83 among the 70,290 providers of this specialty who prescribed in Part D.
Most prescribed
- Amoxicillin31 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.
Eric James Castenson among 3,489 general practice dentistry records in Massachusetts
Eric James Castenson, D.D.S. is one of 3,489 general practice dentistry records with a practice address in Massachusetts. 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 2010, is newer than 65% of them.
- NPI issued2010 · 65% of these records are older, 34% newer
- In a Medicare fileYes · 58% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2012 · 77% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223G0001X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
18 general practice dentistry records list a practice address in Amherst
They are 18 of the 769 NPPES records with a practice address in Amherst, and 3,489 general practice dentistry records in Massachusetts.
All 3,489 in Massachusetts → Every provider in Amherst → General Practice Dentistry nationwide →
The 8 general practice dentistry records with the nearest ZIP codes
- Arsen Bagdasarov, DMDAmherst, MA 010021629098967
- Nitika Bhatanagar, DMDAmherst, MA 010021275713547
- Gordon Freed, D.M.D.Amherst, MA 010021720162589
- Barbara Freed, D.M.D.Amherst, MA 010021275664922
- William Grass, DDSAmherst, MA 010021124196225
- Jeffrey Humphrey, D.D.S.Amherst, MA 010021124199757
- James Hunt, D.D.S.Amherst, MA 010021982638797
- Marjan Khodadoust, DMDAmherst, MA 010021073730354
Common questions
What is Eric James Castenson, D.D.S.'s NPI number?
Eric James Castenson, D.D.S.'s National Provider Identifier (NPI) is 1710290903, issued on Jul 16, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Eric James Castenson, D.D.S. located?
The NPPES record lists a practice address at 148 Amity St, Amherst, MA, 01002. Phone: (413) 549-8100. Providers update this record themselves, so call before visiting.
How can I verify Eric James Castenson, D.D.S.'s license?
NPPES lists Massachusetts license number DN1855884, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Eric James Castenson, D.D.S. prescribe under Medicare Part D?
In 2024, Eric James Castenson, D.D.S. had 57 Medicare Part D claims for 43 beneficiaries; the average among general practice dentistry prescribers was 83. 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.