Doctor profile · Federal record

Dr. CATHERINE OCONNOR, MD

Surgery Physician (CMS: GENERAL SURGERY) · Surgery Physician · Surgery Physician · Surgery Physician · LEWISTON, ME

  • NPI 1134189434
  • Accepts Medicare
  • MIPS 72.5 / 100 · 2023
  • 38 yrs in practice
  • Licensed in 4 states
  • Female
  • Group practice
  • No sanctions

Practice & contact

Operates at 2 locations .

NPPES Updated May 11, 2026
Primary practice
99 CAMPUS AVE., SUITE 401, ST MARY'S SURGICAL ASSOCIATES
LEWISTON, ME 042406045
(207) 777-8650
fax (207) 777-8641
Additional location
1237 E Main St Ste C1
Carbondale, IL 629013148
(618) 457-2281
fax (618) 351-5625
Mailing address
PO BOX 7291
LEWISTON, ME 042437291

Credentials & registration

NPPES · NUCC
NPI registered
March 2006 — 20 yrs on file
Profile last updated
September 29, 2025
Year of graduation
1988 — 38 yrs since
Specialty taxonomy
208600000X — NUCC code
State licenses (4)
Maine #MD17051 · New York #60277802 · Massachusetts #76180 · Illinois #036158770

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1134189434. Last verified May 11, 2026.

Medicare procedures · 2023

Top services delivered

CMS Provider Utilization
Total services
409
Distinct HCPCS
8
Medicare allowed
$70,348
HCPCS Description Services Patients Avg allowed
99214 Established patient office or other outpatient visit, 30-39 minutes 179 119 $122
99213 Established patient office or other outpatient visit, 20-29 minutes 75 57 $87
99205 New patient office or other outpatient visit, 60-74 minutes 41 41 $213
99215 Established patient office or other outpatient visit, 40-54 minutes 29 29 $172
19301 Partial removal of breast 28 26 $656
99204 New patient office or other outpatient visit, 45-59 minutes 20 20 $161
38900 Imaging of lymph nodes during surgery 19 19 $138
38525 Biopsy or removal of deep lymph nodes of underarm 18 18 $226

In context: peer comparison

Among 6 peers in this city , average services per provider: 33. This provider delivers 12× the peer median.

Medicare Part D · 2023

Top prescriptions

CMS Part D Prescriber
Total claims
14
Patients
0
Total drug cost
$191
Drug Type Claims Patients Total cost
Nystatin Generic 14 0 $191

Methodology · sources used on this page

All figures on this page come from publicly available federal datasets. We do not edit, score, or summarise the underlying data. Profile generated May 21, 2026.

NPPES Provider identifiers and practice info May 11, 2026
Open Payments Industry payments to providers (Sunshine Act) May 11, 2026
Medicare Procedure Utilization Services and allowed amounts by HCPCS May 11, 2026
Medicare Part D Prescription drug claims May 11, 2026
CMS MIPS Quality performance scores May 11, 2026
OIG LEIE Federal exclusion / sanctions list May 11, 2026

Information based on publicly available federal data. Not medical advice. Report incorrect data ›