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 .
- 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
- 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
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
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 Lewiston Surgery Physician, average services per provider: 33. This provider delivers 12× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
14
Patients
0
Total drug cost
$191
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Nystatin | Generic | 14 | 0 | $191 |
Frequently asked questions
What is Dr. Catherine Oconnor's medical specialty?
Dr. Catherine Oconnor practices Surgery Physician in Lewiston, ME.
Where does Dr. Catherine Oconnor practice?
Dr. Catherine Oconnor practices at 99 Campus Ave., Suite 401, Lewiston, ME 042406045. Office phone: 2077778650.
What is Dr. Catherine Oconnor's NPI?
Dr. Catherine Oconnor's National Provider Identifier (NPI) is 1134189434, issued by NPPES.
Does Dr. Catherine Oconnor accept Medicare assignment?
Yes. Dr. Catherine Oconnor accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Catherine Oconnor commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99213); New patient office or other outpatient visit (HCPCS 99205). Source: CMS Medicare Physician & Other Practitioners file.