Doctor profile · Federal record
Dr. John O'Brien, A.P.R.N.
Certified Registered Nurse Anesthetist (CMS: Certified Registered Nurse Anesthetist (CRNA)) · Danbury, CT
- NPI 1043336258
- Accepts Medicare
- 20 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
24 Hospital Ave
Danbury, CT 068106099
(203) 797-7118
Credentials & registration
- NPI registered
- March 2007 — 19 yrs on file
- Profile last updated
- July 8, 2007
- Year of graduation
- 2006 — 20 yrs since
- Specialty taxonomy
- 367500000X — NUCC code
- State license (1)
- Connecticut #003588
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1043336258. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
94
Distinct HCPCS
4
Medicare allowed
$7,273
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
01810 |
Anesthesia for procedure on nerves, muscles, tendons, and tissue of forearm, wrist, and hand | 49 | 49 | $56 | |
01830 |
Anesthesia for other procedure on forearm, wrist, or hand bones | 18 | 18 | $82 | |
01400 |
Anesthesia for other procedure or exam of knee joint using an endoscope | 16 | 16 | $73 | |
01402 |
Anesthesia for procedure for total knee joint replacement | 11 | 11 | $171 |
In context: peer comparison
Among 12 peers in this city , average services per provider: 22. This provider delivers 4.3× the peer median.Frequently asked questions
What is Dr. John O'Brien's medical specialty?
Dr. John O'Brien practices Certified Registered Nurse Anesthetist in Danbury, CT.
Where does Dr. John O'Brien practice?
Dr. John O'Brien practices at 24 Hospital Ave, Danbury, CT 068106099. Office phone: 2037977118.
What is Dr. John O'Brien's NPI?
Dr. John O'Brien's National Provider Identifier (NPI) is 1043336258, issued by NPPES.
Does Dr. John O'Brien accept Medicare assignment?
Yes. Dr. John O'Brien accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. John O'Brien commonly perform?
Top Medicare-reported procedures in 2023: Anesthesia for procedure on nerves, muscles, tendons, and tissue of forearm, wrist, and hand (HCPCS 01810); Anesthesia for other procedure on forearm, wrist, or hand bones (HCPCS 01830); Anesthesia for other procedure or exam of knee joint using an endoscope (HCPCS 01400). Source: CMS Medicare Physician & Other Practitioners file.