NPI registry status
Active
2026 NPPES data Physician Assistant NPI 1003141995 PA-C
Verify on CMS → Marina Gershteyn, PA-C
Physician Assistant in Chicago, Illinois.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 156,084 in Physician Assistant, 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
743
Medicare Part D claims · 97 beneficiaries · Physician Assistant avg: 832
Generic prescribing
90%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Marina Gershteyn, PA-C filed 743 Medicare Part D claims in 2024 as a Physician Assistant in Chicago, Illinois, prescribing 90% generic.
- 743
- Part D claims, 2024
- 90%
- generic prescribing
- ≥70th
- 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 Marina Gershteyn, PA-C
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 1003141995), first enumerated 10/09/2009.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 743 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- State context
State board disciplinary context
Illinois statewide board action statistics are published annually — these figures describe aggregate state activity, not Marina Gershteyn, PA-C's individual license status. Verify directly with the state medical board.
Source: IDFPR annual report 2023
- 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.
Compare Gershteyn with other Physician Assistant providers
Same primary specialty, same federal CMS NPPES roster.
All 1,281 Physician Assistant providers in Chicago, IL →
Also enrolled in Illinois
- Brooke Aarhus, PA-C Park Ridge, IL
- Traci Aaron, PA-C Chicago, IL
- Sana Abbasi, PA Carol Stream, IL
- Susan Abbinanti, PA-C Elk Grove Village, IL
- Katheryn Abbott, PA Schaumburg, IL
- Noor Abdelrahman, PA-C Chicago, IL
Other specialties in Chicago: Student in an Organized Health Care Education/Training Program (5,297) · Clinical Social Worker (4,054) · Internal Medicine Physician (3,291) · Physical Therapist (2,616)
CMS NPPES provider registry desk
NPI 1003141995 · Physician Assistant
NPI-10 · ENUM-MID · TAX-MEGA · RX-LIGHT · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1003141995
- ENUM-MID 2009
- TAX-MEGA 156K Physician Assistant
- RX-LIGHT 743
- BOOK-LIGHT 4,550 in Illinois
- PHOTO-ENUM Kaye-Ann Christie, P… · 2009
Marina Gershteyn, PA-C's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
743 ≥ 70th percentile 70% 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
What does the federal data show about Marina Gershteyn, PA-C?
Quality data not reportedPrimary specialty
Physician Assistant
Medicare Part D claims
743 11% vs specialty avg
Specialty distribution in Illinois
How Physician Assistant compares to other specialties among Illinois 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 Physician Assistant. 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 | 1003141995 |
|---|---|
| Specialty | Physician Assistant |
| Credentials | PA-C |
| Gender | Female |
| NPI Issued | 10/09/2009 |
Hospital and facility affiliations
Facilities where Marina Gershteyn, PA-C bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Respiratory, Critical Care And Sleep Specialists, LLC
Des Plaines, IL
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
License & disciplinary context - Illinois IDFPR 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~42K Illinois medical licensees in 2023 - they are NOT specific to Marina Gershteyn, PA-C. To verify Marina Gershteyn, PA-C's current license status, search the IDFPR public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
106
Total board actions, Illinois 2023
Across 103 cases
2.52
Actions per 1,000 licensees
Illinois statewide rate
probation
Most common action type
38 cases
IDFPR publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Illinois disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Marina Gershteyn, PA-C - brand share 10.0%
Physician Assistant average
10% brand-name claims vs 90% generic, on 743 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.
743
Total Claims
$61K
Total Drug Cost
97
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 743.7
- Total Day Supply
- 10,043
- Brand vs Generic
- 10% brand / 90% generic
- Brand Drug Cost
- $14K
- Generic Drug Cost
- $47K
- Antibiotic Claims
- 94
Patient Demographics
- Average Patient Age
- 71.3 years
- Avg HCC Risk Score
- 6.42
- Gender Split
- 55% female / 45% male
- Age Distribution
- <65: 27, 65-74: 28, 75-84: 23, 85+: 19
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Marina Gershteyn, PA-C prescribes most
Top Medicare Part D drugs by claim count, 2024
- Albuterol Sulfate
Albuterol Sulfate
146 claims
- Chlorhexidine Gluc…
Chlorhexidine Gluconate
111 claims
- Acetylcysteine
Acetylcysteine
93 claims
- Budesonide
Budesonide
61 claims
- Prednisone 54
Prednisone
54 claims
- Ipratropium-Albute… 50
Ipratropium-Albuterol
50 claims
- Glycopyrrolate 44
Glycopyrrolate
44 claims
- Amikacin Sulfate 20
Amikacin Sulfate
20 claims
| Drug | Claims |
|---|---|
| Albuterol Sulfate | 146 |
| Chlorhexidine Gluconate | 111 |
| Acetylcysteine | 93 |
| Budesonide | 61 |
| Prednisone | 54 |
| Ipratropium-Albuterol Ipratropium/Albuterol Sulfate | 50 |
| Glycopyrrolate | 44 |
| Amikacin Sulfate | 20 |
| Scopolamine | 13 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Physician Assistant Overview
How Marina Gershteyn, PA-C fits within the Physician Assistant landscape nationally.
156,084
Physician Assistant Providers in US
56
States with Physician Assistant
832
Avg Claims per Provider
Marina Gershteyn, PA-C's 743 claims are below the specialty average of 832.
Nationwide Physician Assistant peers with similar MIPS or enrollment year
Two federal-record peer sets for Gershteyn, both outside Illinois so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2009)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Physician Assistant Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Gershteyn.
One of 4,550 Physician Assistant providers enrolled in Illinois, 11 are shown on this page.
Kazuko Abe
P.A.
Chicago, IL
Derrik Abell
Anna, IL
Jeanine Aberbook
PA-C
Chicago, IL
Megan Abo
Chicago, IL
Jessica Abraham
PA-C
Orland Park, IL
Compare Physician Assistant nationally: see state-by-state distribution →
Frequently Asked Questions
What is Marina Gershteyn, PA-C's specialty? ▼
Marina Gershteyn, PA-C specializes in Physician Assistant and practices in Chicago, Illinois. Credentials: PA-C.
How much does Marina Gershteyn, PA-C prescribe under Medicare Part D? ▼
In 2024, Marina Gershteyn, PA-C wrote 743 Medicare Part D claims totaling $61K in drug costs for 97 beneficiaries.
Where is Marina Gershteyn, PA-C located? ▼
Marina Gershteyn, PA-C is located at 5600 W ADDISON ST STE 306, Chicago, IL, 60634. Phone: (773) 283-8664.
What is Marina Gershteyn, PA-C's NPI number? ▼
Marina Gershteyn, PA-C's National Provider Identifier (NPI) is 1003141995, issued on 10/09/2009.
Does Marina Gershteyn, PA-C prescribe more brand-name or generic drugs? ▼
Marina Gershteyn, PA-C's prescribing is 10% brand-name and 90% generic drugs by claim count, with $14K in brand drug costs.
How many Physician Assistant providers are there in the US? ▼
There are 156,084 Physician Assistant providers across 56 states in the US. The average Physician Assistant provider writes 832 Medicare Part D claims per year.
What drugs does Marina Gershteyn, PA-C prescribe most often? ▼
Based on 2024 Medicare Part D data, Marina Gershteyn, PA-C's most frequently prescribed drugs include Albuterol Sulfate, Chlorhexidine Gluconate, Acetylcysteine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Marina Gershteyn, PA-C accept Medicare? ▼
Marina Gershteyn, PA-C appears in CMS Medicare data with 743 Part D claims and 97 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Marina Gershteyn, PA-C's credentials? ▼
Marina Gershteyn, PA-C's NPI is 1003141995 with credentials PA-C. 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.