NPI registry status
Active
2026 NPPES data Gynecologic Oncology Physician NPI 1568440451 MD
Verify on CMS → Mark Shahin, MD
Gynecologic Oncology Physician in Hershey, Pennsylvania.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,364 in Gynecologic Oncology 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
449
Medicare Part D claims · 104 beneficiaries · Gynecologic Oncology Physician avg: 188
Generic prescribing
63%
generic claims · 37% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$165.9K
186 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Mark Shahin, MD filed 449 Medicare Part D claims in 2023 as a Gynecologic Oncology Physician in Hershey, Pennsylvania, prescribing 63% generic.
- 449
- Part D claims, 2023
- 63%
- generic prescribing
- Likely
- board-certified (heuristic)
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.
Mark Shahin, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
449 Top 38% higher than 62% 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 certification likely (heuristic, not verified)
Mark Shahin, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Mark Shahin, MD?
Quality data not reportedPrimary specialty
Gynecologic Oncology Physician
Medicare Part D claims
449 139% vs specialty avg
Specialty distribution in Pennsylvania
How Gynecologic Oncology Physician compares to other specialties among Pennsylvania 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 Gynecologic Oncology 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).
Mark Shahin, MD appears in the CMS NPPES registry as a Gynecologic Oncology Physician provider holding MD credentials at 500 UNIVERSITY DR, Hershey, PA, 17033, with a listed phone of (717) 531-3503. NPI 1568440451 was issued on 01/03/2006.
Medicare Part D records for calendar year 2023 show 449 prescription claims written by this provider, covering 104 Medicare beneficiaries and totaling roughly $1.1 million in drug spend, split 37% brand-name and 63% generic by claim count, with an opioid prescribing rate of 4.2%.
Gynecologic Oncology Physician is a narrow specialty nationwide, with 1,364 enrolled providers across 49 states and an average of 188 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 | 1568440451 |
|---|---|
| Specialty | Gynecologic Oncology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 01/03/2006 |
Hospital and facility affiliations
Facilities where Mark Shahin, MD 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.
Alliance Cancer Specialists P.C.
Doylestown, PA
The Milton S Hershey Medical Center Physicians Group
Hershey, PA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
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 Shahin, MD. Source: openpaymentsdata.cms.gov.
Total received
$165.9K
Largest payer
GlaxoSmithKline, LLC.
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.
License & disciplinary context - Pennsylvania PA-BOM 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 ~45K Pennsylvania medical licensees in 2023 - they are NOT specific to Mark Shahin, MD. To verify Mark Shahin, MD's current license status, search the PA-BOM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
133
Total board actions, Pennsylvania 2023
Across 129 cases
2.96
Actions per 1,000 licensees
Pennsylvania statewide rate
probation
Most common action type
48 cases
PA-BOM 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 Pennsylvania disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Above average
Mark Shahin, MD - brand share 37.0%
Gynecologic Oncology Physician average
37% brand-name claims vs 63% generic, on 449 2023 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 2023.
449
Total Claims
$1.1M
Total Drug Cost
104
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 613
- Total Day Supply
- 15,068
- Brand vs Generic
- 37% brand / 63% generic
- Brand Drug Cost
- $1.1M
- Generic Drug Cost
- $7K
- Opioid Claims
- 19 (4.2% rate)
- Antibiotic Claims
- 25
Patient Demographics
- Average Patient Age
- 70.7 years
- Avg HCC Risk Score
- 2.11
- Gender Split
- 100% female / 0% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Mark Shahin, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Lynparza
Lynparza
56 claims
- Ondansetron Hcl
Ondansetron Hcl
36 claims
- Eliquis
Eliquis
32 claims
- Letrozole
Letrozole
30 claims
- Prochlorperazine M…
Prochlorperazine Maleate
28 claims
- Zejula
Zejula
28 claims
- Lorazepam 18
Lorazepam
18 claims
- Estradiol 14
Estradiol
14 claims
| Drug | Claims |
|---|---|
| Lynparza Olaparib | 56 |
| Ondansetron Hcl | 36 |
| Eliquis Apixaban | 32 |
| Letrozole | 30 |
| Prochlorperazine Maleate | 28 |
| Zejula Niraparib Tosylate | 28 |
| Lorazepam | 18 |
| Estradiol | 14 |
| Estradiol (Twice Weekly) Estradiol | 14 |
| Prednisolone Acetate | 13 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Gynecologic Oncology Physician Overview
How Mark Shahin, MD fits within the Gynecologic Oncology Physician landscape nationally.
1,364
Gynecologic Oncology Physician Providers in US
49
States with Gynecologic Oncology Physician
188
Avg Claims per Provider
Mark Shahin, MD's 449 claims are above the specialty average of 188.
Nearby Gynecologic Oncology Physician Providers in Pennsylvania
Other clinicians with the same primary specialty enrolled in Pennsylvania, drawn from the same CMS NPPES roster as Shahin.
Dr. Nawar Abdul Latif
M.D.
Philadelphia, PA
Dr. Gazi Abdulhay
MD
Upland, PA
Dr. Allison Ball
M.D.
Wilkes Barre, PA
Jessica Berger
Pittsburgh, PA
Michelle Boisen
Pittsburgh, PA
Compare Gynecologic Oncology 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 Pennsylvania medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Gynecologic Oncology 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 Mark Shahin, MD's specialty? ▼
Mark Shahin, MD specializes in Gynecologic Oncology Physician and practices in Hershey, Pennsylvania. Credentials: MD.
How much does Mark Shahin, MD prescribe under Medicare Part D? ▼
In 2023, Mark Shahin, MD wrote 449 Medicare Part D claims totaling $1.1M in drug costs for 104 beneficiaries.
Where is Mark Shahin, MD located? ▼
Mark Shahin, MD is located at 500 UNIVERSITY DR, Hershey, PA, 17033. Phone: (717) 531-3503.
What is Mark Shahin, MD's NPI number? ▼
Mark Shahin, MD's National Provider Identifier (NPI) is 1568440451, issued on 01/03/2006.
Does Mark Shahin, MD prescribe more brand-name or generic drugs? ▼
Mark Shahin, MD's prescribing is 37% brand-name and 63% generic drugs by claim count, with $1.1M in brand drug costs.
Does Mark Shahin, MD prescribe opioids? ▼
Yes, Mark Shahin, MD had 19 opioid claims in 2023 with an opioid prescribing rate of 4.2%.
How many Gynecologic Oncology Physician providers are there in the US? ▼
There are 1,364 Gynecologic Oncology Physician providers across 49 states in the US. The average Gynecologic Oncology Physician provider writes 188 Medicare Part D claims per year.
What drugs does Mark Shahin, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Mark Shahin, MD's most frequently prescribed drugs include Lynparza, Ondansetron Hcl, Eliquis. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mark Shahin, MD accept Medicare? ▼
Mark Shahin, MD appears in CMS Medicare data with 449 Part D claims and 104 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mark Shahin, MD's credentials? ▼
Mark Shahin, MD's NPI is 1568440451 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 (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.