NPI registry status
Active
2026 NPPES data Emergency Medicine Physician NPI 1295759207 MD
Verify on CMS → Mark Olszyk, MD
Emergency Medicine Physician in Westminster, Maryland.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 66,293 in Emergency Medicine 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
165
Medicare Part D claims · 112 beneficiaries · Emergency Medicine Physician avg: 355
Industry payments
$23.2
1 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Mark Olszyk, MD filed 165 Medicare Part D claims in 2024 as an Emergency Medicine Physician in Westminster, Maryland.
- 165
- Part D claims, 2024
- $23.2
- industry payments (Sunshine Act)
- ≥34th
- 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 Mark Olszyk, MD
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 1295759207), first enumerated 07/26/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 165 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
$23.2 in reported industry payments (1 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.
Compare Olszyk with other Emergency Medicine Physician providers
Same primary specialty, same federal CMS NPPES roster.
All 22 Emergency Medicine Physician providers in Westminster, MD →
Also enrolled in Maryland
- Kara Abarcar Baltimore, MD
- Dr. Steven Abert, MD Glen Burnie, MD
- Dr. John Abraham, M.D. Germantown, MD
- Dr. Michael Abraham, MD Baltimore, MD
- Dr. Elias Abras, MD Baltimore, MD
- Dr. Alexander Achenbach, MD Jb Andrews, MD
Other specialties in Westminster: Clinical Social Worker (113) · Speech-Language Pathologist (93) · Physical Therapist (88) · Professional Counselor (76)
CMS NPPES provider registry desk
NPI 1295759207 · Emergency Medicine Physician
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-LIGHT · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1295759207
- ENUM-LEGACY 2006
- TAX-MEGA 66K Emergency Medicine
- RX-LIGHT 165
- BOOK-LIGHT 1,156 in Maryland
- PHOTO-ENUM Michael Malik, MD · 2006
Mark Olszyk, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
165 ≥ 34th percentile 34% 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)
Mark Olszyk, MD 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 Mark Olszyk, MD?
Quality data not reportedPrimary specialty
Emergency Medicine Physician
Medicare Part D claims
165 54% vs specialty avg
Specialty distribution in Maryland
How Emergency Medicine Physician compares to other specialties among Maryland 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 Emergency Medicine 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 | 1295759207 |
|---|---|
| Specialty | Emergency Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 07/26/2006 |
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 Mark Olszyk, MD. Source: openpaymentsdata.cms.gov.
Total received
$23
Largest payer
Inari Medical, 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 2024.
165
Total Claims
$4K
Total Drug Cost
112
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 408.567
- Total Day Supply
- 11,759
- Brand Drug Cost
- $0
- Generic Drug Cost
- $4K
Patient Demographics
- Average Patient Age
- 75.9 years
- Avg HCC Risk Score
- 1.59
- Gender Split
- 53% female / 47% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Mark Olszyk, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Warfarin Sodium
Warfarin Sodium
117 claims
- Jantoven 27
Jantoven
27 claims
- Enoxaparin Sodium 21
Enoxaparin Sodium
21 claims
| Drug | Claims |
|---|---|
| Warfarin Sodium | 117 |
| Jantoven Warfarin Sodium | 27 |
| Enoxaparin Sodium | 21 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Emergency Medicine Physician Overview
How Mark Olszyk, MD fits within the Emergency Medicine Physician landscape nationally.
66,293
Emergency Medicine Physician Providers in US
56
States with Emergency Medicine Physician
355
Avg Claims per Provider
Mark Olszyk, MD's 165 claims are below the specialty average of 355.
Nationwide Emergency Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Olszyk, both outside Maryland 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 Emergency Medicine Physician Providers in Maryland
Other clinicians with the same primary specialty enrolled in Maryland, drawn from the same CMS NPPES roster as Olszyk.
One of 1,156 Emergency Medicine Physician providers enrolled in Maryland, 11 are shown on this page.
Dr. Ifeoluwa Adabonyan
M.D.
Cumberland, MD
Dr. Omoyemi Adebayo
M.D.
Glen Burnie, MD
Dr. Leon Adelman
M.D.
Bowie, MD
Dr. Titilayo Adetu
MD
Bel Air, MD
Dr. Subarna Adhikari
M.D.
Easton, MD
Compare Emergency Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Mark Olszyk, MD's specialty? ▼
Mark Olszyk, MD specializes in Emergency Medicine Physician and practices in Westminster, Maryland. Credentials: MD.
How much does Mark Olszyk, MD prescribe under Medicare Part D? ▼
In 2024, Mark Olszyk, MD wrote 165 Medicare Part D claims totaling $4K in drug costs for 112 beneficiaries.
Where is Mark Olszyk, MD located? ▼
Mark Olszyk, MD is located at 200 MEMORIAL AVE, Westminster, MD, 21157. Phone: (410) 871-6129.
What is Mark Olszyk, MD's NPI number? ▼
Mark Olszyk, MD's National Provider Identifier (NPI) is 1295759207, issued on 07/26/2006.
How many Emergency Medicine Physician providers are there in the US? ▼
There are 66,293 Emergency Medicine Physician providers across 56 states in the US. The average Emergency Medicine Physician provider writes 355 Medicare Part D claims per year.
What drugs does Mark Olszyk, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Mark Olszyk, MD's most frequently prescribed drugs include Warfarin Sodium, Jantoven, Enoxaparin Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mark Olszyk, MD accept Medicare? ▼
Mark Olszyk, MD appears in CMS Medicare data with 165 Part D claims and 112 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mark Olszyk, MD's credentials? ▼
Mark Olszyk, MD's NPI is 1295759207 with credentials MD. 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.