Maryellen O'Connor, D.C.
Chiropractor · Waltham, MA
Maryellen O'Connor, D.C. is a chiropractor with a practice address in Waltham, Massachusetts, and NPI 1093804791, issued on Oct 12, 2006. Check the license (Massachusetts 3132, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Maryellen O'Connor
- Credential
- D.C.
- Primary taxonomy
- Chiropractor 111N00000X
- License number
- 3132 MA
Self-reported in NPPES; status is on the state search - Practice location
- 564 Main St, Waltham, MA 02452
- Phone
- (781) 894-8880
- Enumerated
- Oct 12, 2006
- Record last updated
- Jul 8, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (781) 894-1121
- Medicare enrollment
- Enrolled (PECOS I20070621000502); accepts Medicare assignment
- Medical or professional school
- New York Chiropractic College, 2007
- Entity
- Type 1 · individual
Also registered at 564 Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ilana AmbrogiFamily Medicine Physician1720346737
- Dominique Auger, DPTPhysical Therapist1063067916
- Jessica Bonchi, DPTPhysical Therapist1639695653
- Lori Caddoo, MSPTPhysical Therapist1275608259
- Mark Drews, MDInternal Medicine Physician1184693616
- Margaret Duddy, APRNFamily Nurse Practitioner1528342193
Verify Maryellen O'Connor in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license 3132Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Patient First Chiropractic And Physical Therapy PCWaltham, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Chiropractor providers in Massachusetts
There are 1,577 chiropractor records in Massachusetts.
Other chiropractor records in Massachusetts
- Ibrahim Abdulmassih, D.C.Worcester, MA1740329317
- Susan Aberle, D.C.Falmouth, MA1548453475
- Michael Abgrab, D.C.Fall River, MA1184773814
- Marty Abrams, MA, DCSharon, MA1356343305
- Joan Accuosti, D.C.Pittsfield, MA1144292509
- Erin Acevedo, D.C.Beverly, MA1780741769
- Elisa Adams, D.C.Lexington, MA1194887794
- James Adams, D.C.Plymouth, MA1598978777
- Jeffrey Adams, D.C.Marshfield, MA1386764041
- Lauren Adelizi, DCWellesley, MA1255510384
Common questions
What is Maryellen O'Connor, D.C.'s NPI number?
Maryellen O'Connor, D.C.'s National Provider Identifier (NPI) is 1093804791, issued on Oct 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Maryellen O'Connor, D.C. located?
The NPPES record lists a practice address at 564 Main St, Waltham, MA, 02452. Phone: (781) 894-8880. Providers update this record themselves, so call before visiting.
How can I verify Maryellen O'Connor, D.C.'s license?
NPPES lists Massachusetts license number 3132, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity 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.