NPI registry status
Active
2026 NPPES data Gynecology Physician NPI 1528023181 M.D.
Verify on CMS → Roslyn Chosak, M.D.
Gynecology Physician in New Haven, 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 3,906 in Gynecology 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
591
Medicare Part D claims · 172 beneficiaries · Gynecology Physician avg: 295
Industry payments
$220.69
8 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Roslyn Chosak, M.D. filed 591 Medicare Part D claims in 2023 as a Gynecology Physician in New Haven, Connecticut.
- 591
- Part D claims, 2023
- $220.69
- industry payments (Sunshine Act)
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.
Roslyn Chosak, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
591 Top 34% higher than 66% of 1,370,886 prescribers
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.
Source CMS Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
Roslyn Chosak, 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 Roslyn Chosak, M.D.?
Quality data not reportedPrimary specialty
Gynecology Physician
Medicare Part D claims
591 100% vs specialty avg
Specialty distribution in Connecticut
How Gynecology 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 Gynecology 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).
Roslyn Chosak, M.D. appears in the CMS NPPES registry as a Gynecology Physician provider holding M.D. credentials at 2 CHURCH ST S, New Haven, CT, 06519, with a listed phone of (203) 562-5439. NPI 1528023181 was issued on 04/18/2006.
Medicare Part D records for calendar year 2023 show 591 prescription claims written by this provider, covering 172 Medicare beneficiaries and totaling roughly $112K in drug spend.
Gynecology Physician is a narrow specialty nationwide, with 3,906 enrolled providers across 53 states and an average of 295 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1528023181 |
|---|---|
| Specialty | Gynecology Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 04/18/2006 |
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 Roslyn Chosak, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$221
Largest payer
Astellas Pharma US Inc
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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
591
Total Claims
$112K
Total Drug Cost
172
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,230
- Total Day Supply
- 34,063
- Generic Drug Cost
- $22K
- Antibiotic Claims
- 48
Patient Demographics
- Average Patient Age
- 72.7 years
- Avg HCC Risk Score
- 0.83
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Roslyn Chosak, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Estradiol
Estradiol
109 claims
- Estradiol (Twice W… 41
Estradiol (Twice Weekly)
41 claims
- Nitrofurantoin Mon… 29
Nitrofurantoin Mono-Macro
29 claims
- Alendronate Sodium 25
Alendronate Sodium
25 claims
- Myrbetriq 23
Myrbetriq
23 claims
- Nystatin-Triamcino… 22
Nystatin-Triamcinolone
22 claims
- Fluconazole 20
Fluconazole
20 claims
- Dotti 17
Dotti
17 claims
| Drug | Claims |
|---|---|
| Estradiol | 109 |
| Estradiol (Twice Weekly) Estradiol | 41 |
| Nitrofurantoin Mono-Macro Nitrofurantoin Monohyd/M-Cryst | 29 |
| Alendronate Sodium | 25 |
| Myrbetriq Mirabegron | 23 |
| Nystatin-Triamcinolone Nystatin/Triamcinolone Acet | 22 |
| Fluconazole | 20 |
| Dotti Estradiol | 17 |
| Estradiol (Once Weekly) Estradiol | 17 |
| Ciprofloxacin Hcl | 14 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Gynecology Physician Overview
How Roslyn Chosak, M.D. fits within the Gynecology Physician landscape nationally.
3,906
Gynecology Physician Providers in US
53
States with Gynecology Physician
295
Avg Claims per Provider
Roslyn Chosak, M.D.'s 591 claims are above the specialty average of 295.
Nearby Gynecology Physician Providers in Connecticut
Other clinicians with the same primary specialty enrolled in Connecticut, drawn from the same CMS NPPES roster as Chosak.
Dr. Ramzi Alkass
MD
Farmington, CT
Dr. Ronald Archibold
M.D.
Putnam, CT
Dr. Timothy Barczak
MD
New London, CT
Dr. Richard Bercik
MD
New Haven, CT
Dr. Kenneth Blau
M.D.
Danbury, CT
Compare Gynecology Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Connecticut medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Gynecology Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Roslyn Chosak, M.D.'s specialty? ▼
Roslyn Chosak, M.D. specializes in Gynecology Physician and practices in New Haven, Connecticut. Credentials: M.D..
How much does Roslyn Chosak, M.D. prescribe under Medicare Part D? ▼
In 2023, Roslyn Chosak, M.D. wrote 591 Medicare Part D claims totaling $112K in drug costs for 172 beneficiaries.
Where is Roslyn Chosak, M.D. located? ▼
Roslyn Chosak, M.D. is located at 2 CHURCH ST S, New Haven, CT, 06519. Phone: (203) 562-5439.
What is Roslyn Chosak, M.D.'s NPI number? ▼
Roslyn Chosak, M.D.'s National Provider Identifier (NPI) is 1528023181, issued on 04/18/2006.
How many Gynecology Physician providers are there in the US? ▼
There are 3,906 Gynecology Physician providers across 53 states in the US. The average Gynecology Physician provider writes 295 Medicare Part D claims per year.
What drugs does Roslyn Chosak, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Roslyn Chosak, M.D.'s most frequently prescribed drugs include Estradiol, Estradiol (Twice Weekly), Nitrofurantoin Mono-Macro. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Roslyn Chosak, M.D. accept Medicare? ▼
Roslyn Chosak, M.D. appears in CMS Medicare data with 591 Part D claims and 172 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Roslyn Chosak, M.D.'s credentials? ▼
Roslyn Chosak, M.D.'s NPI is 1528023181 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 (2023). 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 April 2026 (NPPES) / 2023 (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
Compiled from official public sources by the PlainDoctor editorial team.
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 May 2026.