What is Carolyn O'Connor's NPI number?

Carolyn O'Connor's National Provider Identifier (NPI) is 1851328413, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Carolyn O'Connor's specialty?

Carolyn O'Connor is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).

Where is Carolyn O'Connor located?

Carolyn O'Connor's practice location on file with NPPES is 385 Main St S, Southbury, CT 06488-4240.

What is Carolyn O'Connor's phone number?

The practice phone number listed in the NPPES registry for Carolyn O'Connor is (203) 262-4600.

Does Carolyn O'Connor accept Medicare?

Carolyn O'Connor is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Carolyn O'Connor's NPI active?

Yes — Carolyn O'Connor's NPI (1851328413) is active in the NPPES registry as of the last update on 2021-10-28.

IndividualActiveAccepts Medicare

Carolyn O'Connor, MD

NPI 1851328413 · Internal Medicine Physician · Southbury, CT

Carolyn O'Connor, MD is a Internal Medicine Physician provider in Southbury, CT (NPI 1851328413).

Provider details

NPI number: 1851328413
Entity type: Individual
Primary specialty: Internal Medicine PhysicianAllopathic & Osteopathic Physicians
Credential: MD
Sex: Female
Sole proprietor: No
License: 041131 (CT)

Practice location

385 Main St S

Suite 106

Southbury, CT 06488-4240

Phone: (203) 262-4600

Street-level locationGet directions

More CT providers

Mailing address

385 Main St S

Southbury, CT 06488-4240

Specialties & taxonomies

Internal Medicine PhysicianPrimary207R00000XLicense 041131 (CT)
Allopathic & Osteopathic Physicians

Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Profile Score

Detailed profile(77/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure25% of score
20 yrs in NPPES registry
Profile completeness25% of score
100% of core fields populated
Practice footprint15% of score
1 documented practice location
Medicare service volume (vs. specialty peers)25% of score
849 Medicare services, 2024 (ranked within specialty)
Open Payments transparency10% of score
Has Open Payments disclosures (2024)

Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

What this provider does (Medicare)

Based on Medicare fee-for-service claims, 2024; not all care is captured.

Service (HCPCS)	Medicare services	Typical Medicare-allowed (2024)
Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214	338	$134
Advance Care Planning, First 30 Minutes99497	135	$84
Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439	128	$135
Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213	113	$95
Injection of Drug Or Substance Under Skin Or Into Muscle96372	68	$15
Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000

What this provider prescribes (Medicare Part D)

Top drugs by Medicare Part D claim volume, 2024 · 61 distinct drugs on file.

Drug	Part D claims (2024)	Beneficiaries
Atorvastatin Calcium	329	102
Amlodipine Besylate	294	90
Levothyroxine Sodium	256	70
Lisinopril	242	72
Rosuvastatin Calcium	183	54
Hydrochlorothiazide	168	49
Escitalopram Oxalate

Transparency — industry payments

Based on CMS Open Payments, 2024; not all care is captured.

$47 across 2 records (Open Payments 2024)

Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.

Enumerated: 2006-06-27
Last updated: 2021-10-28
Certified: 2021-10-28

Frequently asked questions

What is Carolyn O'Connor's NPI number?: Carolyn O'Connor's National Provider Identifier (NPI) is 1851328413, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Carolyn O'Connor's specialty?: Carolyn O'Connor is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
Where is Carolyn O'Connor located?: Carolyn O'Connor's practice location on file with NPPES is 385 Main St S, Southbury, CT 06488-4240.
What is Carolyn O'Connor's phone number?: The practice phone number listed in the NPPES registry for Carolyn O'Connor is (203) 262-4600.
Does Carolyn O'Connor accept Medicare?: Carolyn O'Connor is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
Is Carolyn O'Connor's NPI active?: Yes — Carolyn O'Connor's NPI (1851328413) is active in the NPPES registry as of the last update on 2021-10-28.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.

What this provider does (Medicare)

Based on Medicare fee-for-service claims, 2024; not all care is captured.

Service (HCPCS)	Medicare services	Typical Medicare-allowed (2024)
Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214	338	$134
Advance Care Planning, First 30 Minutes99497	135	$84
Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439	128	$135
Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213	113	$95
Injection of Drug Or Substance Under Skin Or Into Muscle96372	68	$15
Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000