NPI registry status
Active
2026 NPPES data Cardiovascular Disease Physician NPI 1659349942 M.D.
Verify on CMS → Carolyn Kosack, M.D.
Cardiovascular Disease Physician in Bloomfield, Connecticut.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 25,298 in Cardiovascular Disease Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
4K
Medicare Part D claims · 634 beneficiaries · Cardiovascular Disease Physician avg: 3K
Generic prescribing
92%
generic claims · 8% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$273.45
9 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Carolyn Kosack, M.D. filed 3,924 Medicare Part D claims in 2024 as a Cardiovascular Disease Physician in Bloomfield, Connecticut, prescribing 92% generic.
- 4K
- Part D claims, 2024
- 92%
- generic prescribing
- $273.45
- industry payments (Sunshine Act)
- ≥91st
- pct by Part D claim volume (lower-bound band)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Federal trust snapshot
What official records show about Carolyn Kosack, M.D.
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1659349942), first enumerated 03/10/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 3,924 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- Reported
Industry payment transparency
$273.45 in reported industry payments (9 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1659349942 · Cardiovascular Disease Physician
NPI-10 · ENUM-LEGACY · TAX-MID · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1659349942
- ENUM-LEGACY 2006
- TAX-MID 25K Cardiovascular Disease
- RX-MID 3,924
- BOOK-THIN 444 in Connecticut
- PHOTO-ENUM Rodrigo Chan · 2006
Carolyn Kosack, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
3,924 ≥ 91st percentile 91% of 1,416,883 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
◑
Board-eligible specialty (heuristic, not verified)
Carolyn Kosack, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Carolyn Kosack, M.D.?
Quality data not reportedPrimary specialty
Cardiovascular Disease Physician
Medicare Part D claims
3,924 25% vs specialty avg
Specialty distribution in Connecticut
How Cardiovascular Disease Physician compares to other specialties among Connecticut providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Cardiovascular Disease Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Practice Address
Provider Details
| NPI | 1659349942 |
|---|---|
| Specialty | Cardiovascular Disease Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 03/10/2006 |
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Carolyn Kosack, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$273
Largest payer
Novartis Pharmaceuticals Corporation
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Brand vs generic prescribing mix · Generic-heavy
Carolyn Kosack, M.D. - brand share 8.0%
Cardiovascular Disease Physician average
8% brand-name claims vs 92% generic, on 3,924 2024 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
3,924
Total Claims
$482K
Total Drug Cost
634
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 11,052.833
- Total Day Supply
- 330,541
- Brand vs Generic
- 8% brand / 92% generic
- Brand Drug Cost
- $418K
- Generic Drug Cost
- $64K
Patient Demographics
- Average Patient Age
- 77.6 years
- Avg HCC Risk Score
- 1.47
- Gender Split
- 69% female / 31% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Carolyn Kosack, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Atorvastatin Calcium
Atorvastatin Calcium
530 claims
- Metoprolol Succinate
Metoprolol Succinate
477 claims
- Amlodipine Besylate
Amlodipine Besylate
398 claims
- Ezetimibe 192
Ezetimibe
192 claims
- Rosuvastatin Calcium 188
Rosuvastatin Calcium
188 claims
- Valsartan 176
Valsartan
176 claims
- Losartan Potassium 169
Losartan Potassium
169 claims
- Lisinopril 151
Lisinopril
151 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 530 |
| Metoprolol Succinate | 477 |
| Amlodipine Besylate | 398 |
| Ezetimibe | 192 |
| Rosuvastatin Calcium | 188 |
| Valsartan | 176 |
| Losartan Potassium | 169 |
| Lisinopril | 151 |
| Furosemide | 126 |
| Carvedilol | 115 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Cardiovascular Disease Physician Overview
How Carolyn Kosack, M.D. fits within the Cardiovascular Disease Physician landscape nationally.
25,298
Cardiovascular Disease Physician Providers in US
54
States with Cardiovascular Disease Physician
3,149
Avg Claims per Provider
Carolyn Kosack, M.D.'s 3,924 claims are above the specialty average of 3,149.
Nationwide Cardiovascular Disease Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Kosack, both outside Connecticut so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Cardiovascular Disease Physician Providers in Connecticut
Other clinicians with the same primary specialty enrolled in Connecticut, drawn from the same CMS NPPES roster as Kosack.
One of 444 Cardiovascular Disease Physician providers enrolled in Connecticut, 5 are shown here.
Khaled Abaza
Middletown, CT
Dr. Binny Abraham
M.D.
New Haven, CT
Dr. Joseph Abreu
MD
Torrington, CT
Dr. Sneha Agarwalla
MD
Bloomfield, CT
Dr. Elliot Agin
M.D.
Milford, CT
Compare Cardiovascular Disease Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Carolyn Kosack, M.D.'s specialty? ▼
Carolyn Kosack, M.D. specializes in Cardiovascular Disease Physician and practices in Bloomfield, Connecticut. Credentials: M.D..
How much does Carolyn Kosack, M.D. prescribe under Medicare Part D? ▼
In 2024, Carolyn Kosack, M.D. wrote 3,924 Medicare Part D claims totaling $482K in drug costs for 634 beneficiaries.
Where is Carolyn Kosack, M.D. located? ▼
Carolyn Kosack, M.D. is located at 711 COTTAGE GROVE RD, Bloomfield, CT, 06002. Phone: (860) 242-8756.
What is Carolyn Kosack, M.D.'s NPI number? ▼
Carolyn Kosack, M.D.'s National Provider Identifier (NPI) is 1659349942, issued on 03/10/2006.
Does Carolyn Kosack, M.D. prescribe more brand-name or generic drugs? ▼
Carolyn Kosack, M.D.'s prescribing is 8% brand-name and 92% generic drugs by claim count, with $418K in brand drug costs.
How many Cardiovascular Disease Physician providers are there in the US? ▼
There are 25,298 Cardiovascular Disease Physician providers across 54 states in the US. The average Cardiovascular Disease Physician provider writes 3,149 Medicare Part D claims per year.
What drugs does Carolyn Kosack, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Carolyn Kosack, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Metoprolol Succinate, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Carolyn Kosack, M.D. accept Medicare? ▼
Carolyn Kosack, M.D. appears in CMS Medicare data with 3,924 Part D claims and 634 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Carolyn Kosack, M.D.'s credentials? ▼
Carolyn Kosack, M.D.'s NPI is 1659349942 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of August 2026 (NPPES) / 2024 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.