Alfonso E. Sierra, MD
Pediatrics Physician · Dracut, MA
Alfonso E. Sierra, MD is a pediatrics physician with a practice address in Dracut, Massachusetts, and NPI 1700978293, issued on Sep 29, 2006. Check the license (Massachusetts 40721, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Alfonso E. Sierra
- Credential
- MD
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- 40721 MA
Self-reported in NPPES; status is on the state search - Practice location
- 505 Nashua RD, Dracut, MA 01826
- Phone
- (978) 957-4300
- Enumerated
- Sep 29, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (978) 957-3891
- Entity
- Type 1 · individual
Also registered at 505 Nashua RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alena Ashenberg, M.D.Pediatrics Physician1629146782
- Carlos Del Rio, M.D.Internal Medicine Physician1285608398
- Nasim Ghaffar, M.D.Family Medicine Physician1770554032
- Valerie King, ARNPNurse Practitioner1295705044
- Terry Schrubb, DMDGeneral Practice Dentistry1083628465
- Azadeh ShahabDentist1255765756
Verify Alfonso E. Sierra in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 40721Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3 pediatrics physician records list a practice address in Dracut
They are 3 of the 267 NPPES records with a practice address in Dracut, and 2,628 pediatrics physician records in Massachusetts. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 3 in Dracut → All 2,628 in Massachusetts → Every provider in Dracut →
Other pediatrics physician records in Massachusetts
- Marissa AaronBoston, MA1538687827
- Ralph Aarons, MDBrighton, MA1407841570
- Ebla Abd AlrahmanWorcester, MA1255966743
- James Abel, M.D.Pelham, MA1255521381
- Aileen Abesamis, MDBrockton, MA1619056546
- Claire Abraham, MDBoston, MA1942731161
- Shari Abramowitz, M.D.Boston, MA1558346593
- Nadeen AbujaberBoston, MA1053635938
- Stephanie Abuso, DOBoston, MA1437788148
- Mark Acker, M.D.Taunton, MA1629011382
Common questions
What is Alfonso E. Sierra, MD's NPI number?
Alfonso E. Sierra, MD's National Provider Identifier (NPI) is 1700978293, issued on Sep 29, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Alfonso E. Sierra, MD located?
The NPPES record lists a practice address at 505 Nashua RD, Dracut, MA, 01826. Phone: (978) 957-4300. Providers update this record themselves, so call before visiting.
How can I verify Alfonso E. Sierra, MD's license?
NPPES lists Massachusetts license number 40721, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.