Physician Profile
Unclaimed ProfileAbout O'BRIEN
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Education & Training
Areas of Expertise
Common questions
What does Dr. O'Brien specialise in?
Dr. O'Brien is an anesthesiology in Fitchburg, MA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “ANESTHESIOLOGY”.
NPI registry
Where is Dr. O'Brien located?
Dr. O'Brien is listed at 326 NICHOLS RD SUITE 16, Fitchburg, MA 01420. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. O'Brien's phone number?
The number on file is (978) 665-5800. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. O'Brien's NPI number?
Dr. O'Brien's National Provider Identifier is 1033144852. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. O'Brien go to medical school?
Dr. O'Brien attended Other, graduating in 1975. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. O'Brien been practising?
Dr. O'Brien has 51 years experience. Calculated from a graduation year of 1975, reported in the CMS National Downloadable File.
CMS public data
What does Dr. O'Brien do most often?
According to Medicare billing data, Dr. O'Brien provides treatments such as anesthesia for lens surgery and anesthesia for exam of colon using an endoscope. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. O'Brien confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. O'Brien. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (978) 665-5800
- Email not available
Practice Locations
326 NICHOLS RD SUITE 16
Fitchburg, MA 01420
Procedures Most Often Billed to Medicare
202 services · 198 patients · 5 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Anesthesia for lens surgery | Anaesthesia | 00142 |
103 |
| Anesthesia for exam of colon using an endoscope | Anaesthesia | 00812 |
36 |
| Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope | Anaesthesia | 00731 |
27 |
| Anesthesia for other procedure on large bowel using an endoscope | Anaesthesia | 00811 |
22 |
| Anesthesia for procedure on small and large bowel using an endoscope | Anaesthesia | 00813 |
14 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other anesthesiology specialists at this location 3
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other anesthesiology specialists in Fitchburg 2
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 1975 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Anesthesia for lens surgery 8
Providers in MA who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.