Doctor profile · Federal record

Dr. Maryellen O'Connor, D.C.

Chiropractor (CMS: Chiropractic) · Waltham, MA

  • NPI 1093804791
  • Accepts Medicare
  • 19 yrs in practice
  • Female
  • Solo practice
  • No sanctions

Practice & contact

NPPES Updated May 11, 2026
Primary practice
564 Main St
Waltham, MA 024525516
(781) 894-8880
fax (781) 894-1121

Credentials & registration

NPPES · NUCC
NPI registered
October 2006 — 20 yrs on file
Profile last updated
July 8, 2019
Year of graduation
2007 — 19 yrs since
Specialty taxonomy
111N00000X — NUCC code
State license (1)
Massachusetts #3132

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1093804791. Last verified May 11, 2026.

Medicare procedures · 2023

Top services delivered

CMS Provider Utilization
Total services
426
Distinct HCPCS
2
Medicare allowed
$14,785
HCPCS Description Services Patients Avg allowed
98940 Chiropractic manipulative treatment, 1-2 spinal regions 286 50 $30
98941 Chiropractic manipulative treatment, 3-4 spinal regions 140 23 $44

In context: peer comparison

Among 3 peers in Waltham Chiropractor, average services per provider: 266. This provider delivers 1.6× the peer median.

Frequently asked questions

Auto-generated from federal data
What is Dr. Maryellen O'Connor's medical specialty?
Dr. Maryellen O'Connor practices Chiropractor in Waltham, MA.
Where does Dr. Maryellen O'Connor practice?
Dr. Maryellen O'Connor practices at 564 Main St, Waltham, MA 024525516. Office phone: 7818948880.
What is Dr. Maryellen O'Connor's NPI?
Dr. Maryellen O'Connor's National Provider Identifier (NPI) is 1093804791, issued by NPPES.
Does Dr. Maryellen O'Connor accept Medicare assignment?
Yes. Dr. Maryellen O'Connor accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Maryellen O'Connor commonly perform?
Top Medicare-reported procedures in 2023: Chiropractic manipulative treatment, 1-2 spinal regions (HCPCS 98940); Chiropractic manipulative treatment, 3-4 spinal regions (HCPCS 98941). Source: CMS Medicare Physician & Other Practitioners file.