Doctor profile · Federal record
Dr. Carolyn O'Brien, N.P
Adult Health Nurse Practitioner (CMS: Nurse Practitioner) · Nurse Practitioner · Franklin, MA
- NPI 1104815539
- Accepts Medicare
- 30 yrs in practice
- Female
- Solo practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
31 Daniels St
Franklin, MA 020381103
(508) 530-3140
fax (508) 538-3142 - Additional location
-
100 Commerce Dr
Northbridge, MA 015341415
(508) 234-6311 - Mailing address
-
Po Box 383
Franklin, MA 020380383
Credentials & registration
- NPI registered
- October 2005 — 21 yrs on file
- Profile last updated
- August 28, 2025
- Year of graduation
- 1996 — 30 yrs since
- Specialty taxonomy
- 363LA2200X — NUCC code
- State licenses (2)
- Massachusetts #190716 · Massachusetts #RN190716
- Medicaid
- MA #0384950
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1104815539. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
116
Distinct HCPCS
2
Medicare allowed
$12,678
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 78 | 67 | $83 | |
99350 |
Residence visit for established patient with high level of medical decision making, per day, if using time, at least 60 minutes | 38 | 20 | $164 |
In context: peer comparison
Among 2 peers in this city , average services per provider: 66. This provider delivers 1.8× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
186
Patients
11
Total drug cost
$9,187
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 30 | 0 | $897 |
| Furosemide | Generic | 26 | 11 | $141 |
| Omeprazole | Generic | 21 | 0 | $445 |
| Lisinopril | Generic | 20 | 0 | $134 |
| Nystatin | Generic | 16 | 0 | $499 |
| Perphenazine | Generic | 14 | 0 | $360 |
| Clonidine | Generic | 13 | 0 | $606 |
| Levothyroxine Sodium | Generic | 12 | 0 | $123 |
| Warfarin Sodium | Generic | 12 | 0 | $82 |
| Januvia (Sitagliptin Phosphate) | Brand | 11 | 0 | $5,836 |
Frequently asked questions
What is Dr. Carolyn O'Brien's medical specialty?
Dr. Carolyn O'Brien practices Adult Health Nurse Practitioner in Franklin, MA.
Where does Dr. Carolyn O'Brien practice?
Dr. Carolyn O'Brien practices at 31 Daniels St, Franklin, MA 020381103. Office phone: 5085303140.
What is Dr. Carolyn O'Brien's NPI?
Dr. Carolyn O'Brien's National Provider Identifier (NPI) is 1104815539, issued by NPPES.
Does Dr. Carolyn O'Brien accept Medicare assignment?
Yes. Dr. Carolyn O'Brien accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Carolyn O'Brien commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Residence visit for established patient with high level of medical decision making (HCPCS 99350). Source: CMS Medicare Physician & Other Practitioners file.