NPI registry status
Active
2026 NPPES data Family Nurse Practitioner NPI 1265433759 NP
Verify on CMS → Mary Whistler, NP
Family Nurse Practitioner in Cheektowaga, New York.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 210,832 in Family Nurse Practitioner, 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
3K
Medicare Part D claims · 413 beneficiaries · Family Nurse Practitioner avg: 1K
Generic prescribing
92%
generic claims · 7% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$80.69
4 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Mary Whistler, NP filed 3,078 Medicare Part D claims in 2023 as a Family Nurse Practitioner in Cheektowaga, New York, prescribing 92% generic.
- 3K
- Part D claims, 2023
- 92%
- generic prescribing
- $80.69
- industry payments (Sunshine Act)
- ≥89th
- 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.
CMS NPPES provider registry desk
NPI 1265433759 · Family Nurse Practitioner
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-MID · BOOK-MID · PHOTO-ENUM
- NPI-10 1265433759
- ENUM-LEGACY 2005
- TAX-MEGA 211K Family Nurse
- RX-MID 3,078
- BOOK-MID 12,508 in New York
- PHOTO-ENUM Elaine Woo · 2005
Mary Whistler, NP's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
3,078 ≥ 89th percentile 89% of 1,370,886 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 · 2023
What does the federal data show about Mary Whistler, NP?
Quality data not reportedPrimary specialty
Family Nurse Practitioner
Medicare Part D claims
3,078 152% vs specialty avg
Specialty distribution in New York
How Family Nurse Practitioner compares to other specialties among New York 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 Family Nurse Practitioner. 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 | 1265433759 |
|---|---|
| Specialty | Family Nurse Practitioner |
| Credentials | NP |
| Gender | Female |
| NPI Issued | 08/09/2005 |
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 Mary Whistler, NP. Source: openpaymentsdata.cms.gov.
Total received
$81
Largest payer
E.R. Squibb & Sons, L.L.C.
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 - New York NYSBPMC 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 ~100K New York medical licensees in 2023 - they are NOT specific to Mary Whistler, NP. To verify Mary Whistler, NP's current license status, search the NYSBPMC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
312
Total board actions, New York 2023
Across 302 cases
3.12
Actions per 1,000 licensees
New York statewide rate
probation
Most common action type
89 cases
NYSBPMC 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 New York disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Generic-heavy
Mary Whistler, NP - brand share 7.0%
Family Nurse Practitioner average
7% brand-name claims vs 92% generic, on 3,078 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.
3,078
Total Claims
$218K
Total Drug Cost
413
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 7,872
- Total Day Supply
- 232,780
- Brand vs Generic
- 7% brand / 92% generic
- Brand Drug Cost
- $158K
- Generic Drug Cost
- $59K
- Opioid Claims
- 28 (0.9% rate)
- Antibiotic Claims
- 59
Patient Demographics
- Average Patient Age
- 72.3 years
- Avg HCC Risk Score
- 1.16
- Gender Split
- 63% female / 37% male
- Age Distribution
- <65: 39, 65-74: 220, 75-84: 126, 85+: 28
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Mary Whistler, NP prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
294 claims
- Amlodipine Besylate
Amlodipine Besylate
258 claims
- Levothyroxine Sodium
Levothyroxine Sodium
211 claims
- Lisinopril
Lisinopril
195 claims
- Metformin Hcl
Metformin Hcl
154 claims
- Hydrochlorothiazide 117
Hydrochlorothiazide
117 claims
- Rosuvastatin Calcium 91
Rosuvastatin Calcium
91 claims
- Metoprolol Succinate 82
Metoprolol Succinate
82 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 294 |
| Amlodipine Besylate | 258 |
| Levothyroxine Sodium | 211 |
| Lisinopril | 195 |
| Metformin Hcl | 154 |
| Hydrochlorothiazide | 117 |
| Rosuvastatin Calcium | 91 |
| Metoprolol Succinate | 82 |
| Lovastatin | 67 |
| Omeprazole | 66 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Nurse Practitioner Overview
How Mary Whistler, NP fits within the Family Nurse Practitioner landscape nationally.
210,832
Family Nurse Practitioner Providers in US
56
States with Family Nurse Practitioner
1,222
Avg Claims per Provider
Mary Whistler, NP's 3,078 claims are above the specialty average of 1,222.
Nationwide Family Nurse Practitioner peers with similar MIPS or enrollment year
Two federal-record peer sets for Whistler, both outside New York so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2005)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Family Nurse Practitioner Providers in New York
Other clinicians with the same primary specialty enrolled in New York, drawn from the same CMS NPPES roster as Whistler.
One of 12,508 Family Nurse Practitioner providers enrolled in New York, 5 are shown here.
Dr. Carolyn A'Hearn
NP
Syracuse, NY
Dr. Lindsey Aanonsen
FNP
Staten Island, NY
Dr. Abigail Aaron
FNP
New York, NY
Dr. Memoudou Abalola
NP
Bronx, NY
Dr. Jennifer Abate
FNP-BC
New York, NY
Compare Family Nurse Practitioner nationally: see state-by-state distribution →
Frequently Asked Questions
What is Mary Whistler, NP's specialty? ▼
Mary Whistler, NP specializes in Family Nurse Practitioner and practices in Cheektowaga, New York. Credentials: NP.
How much does Mary Whistler, NP prescribe under Medicare Part D? ▼
In 2023, Mary Whistler, NP wrote 3,078 Medicare Part D claims totaling $218K in drug costs for 413 beneficiaries.
Where is Mary Whistler, NP located? ▼
Mary Whistler, NP is located at 539 CLEVELAND DR, Cheektowaga, NY, 14225. Phone: (716) 834-9486.
What is Mary Whistler, NP's NPI number? ▼
Mary Whistler, NP's National Provider Identifier (NPI) is 1265433759, issued on 08/09/2005.
Does Mary Whistler, NP prescribe more brand-name or generic drugs? ▼
Mary Whistler, NP's prescribing is 7% brand-name and 92% generic drugs by claim count, with $158K in brand drug costs.
Does Mary Whistler, NP prescribe opioids? ▼
Yes, Mary Whistler, NP had 28 opioid claims in 2023 with an opioid prescribing rate of 0.9%.
How many Family Nurse Practitioner providers are there in the US? ▼
There are 210,832 Family Nurse Practitioner providers across 56 states in the US. The average Family Nurse Practitioner provider writes 1,222 Medicare Part D claims per year.
What drugs does Mary Whistler, NP prescribe most often? ▼
Based on 2023 Medicare Part D data, Mary Whistler, NP's most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mary Whistler, NP accept Medicare? ▼
Mary Whistler, NP appears in CMS Medicare data with 3,078 Part D claims and 413 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mary Whistler, NP's credentials? ▼
Mary Whistler, NP's NPI is 1265433759 with credentials NP. 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
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.