Physician Profile
Unclaimed ProfileAbout O'NEILL
Based in Enfield, CT, Darren S O'Neill, M.D. is listed in the NPI registry under internal medicine. Darren graduated from University of Connecticut School of Medicine in 1994.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What does Dr. O'Neill specialise in?
Dr. O'Neill is an internal medicine in Enfield, CT. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “INTERNAL MEDICINE”.
NPI registry
Where is Dr. O'Neill located?
Dr. O'Neill is listed at 701 ENFIELD ST, Enfield, CT 06082. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. O'Neill's phone number?
The number on file is (860) 741-6058. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. O'Neill?
Dr. O'Neill's National Provider Identifier is 1861434607. 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'Neill go to medical school?
Dr. O'Neill attended University of Connecticut School of Medicine, graduating in 1994. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. O'Neill have?
Dr. O'Neill has 32 years experience. Calculated from a graduation year of 1994, reported in the CMS National Downloadable File.
CMS public data
What does Dr. O'Neill do most often?
According to Medicare billing data, Dr. O'Neill performs procedures including aspiration and/or injection of fluid from large joint and removal of impacted ear wax; provides treatments such as anticoagulant management of patient taking warfarin and influenza vaccine split virus, preservative free, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. O'Neill's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. O'Neill. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (860) 741-6058
- Email not available
Practice Locations
701 ENFIELD ST
Enfield, CT 06082
Procedures Most Often Billed to Medicare
4,541 services · 2,891 patients · 24 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Aspiration and/or injection of fluid from large joint | Procedure | 20610 |
64 |
| Removal of impacted ear wax | Procedure | 69210 |
33 |
| Anticoagulant management of patient taking warfarin | Treatment | 93793 |
279 |
| Influenza vaccine split virus, preservative free | Treatment | 90662 |
183 |
| Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use | Treatment | 90677 |
150 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | Treatment | 93000 |
80 |
| Injection of drug or substance under skin or into muscle | Treatment | 96372 |
75 |
| Influenza vaccine, trivalent derived from recombinant dna | Treatment | 90673 |
14 |
| Injection, triamcinolone acetonide, not otherwise specified, 10 mg | Drug given | J3301 |
181 |
| Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg | Drug given | J3420 |
75 |
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 internal medicines at this location 6
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 7
Clinically related specialties at the same address — the people this provider most likely works alongside.
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.
More connections — 30 related providers in 4 groups
Other internal medicines in Enfield 7
Same specialty, same city.
Trained at University of Connecticut School of Medicine 7
Other providers in the same specialty who trained at the same institution.
Class of 1994 at University of Connecticut School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Aspiration and/or injection of fluid from large joint 8
Providers in CT 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.