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2026 NPPES data Dermatology Physician NPI 1821036740 M.D.
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Genadij Sienkiewicz, M.D.

Dermatology Physician in Vestal, 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 15,011 in Dermatology 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
52
Medicare Part D claims · 26 beneficiaries · Dermatology Physician avg: 799
Generic prescribing
77%
generic claims · 23% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
84.6/100
▲ 1 pts above national avg 83.5 · Above neutral
Verify NPI on CMS Methodology
Compiled from official public sources by the editorial process.

What the federal data shows

Genadij Sienkiewicz, M.D. reported a CMS MIPS final score of 84.6/100 - above the 83.5 national average - and filed 52 Medicare Part D claims in 2024.

84.6/100
MIPS score · +1 vs avg
52
Part D claims, 2024
77%
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.

Federal trust snapshot

What official records show about Genadij Sienkiewicz, M.D.

Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.

  • Verified

    NPI registry status

    Active listing in the CMS National Provider Identifier Registry (NPI 1821036740), first enumerated 06/03/2006.

    Source: CMS NPPES

  • Reported

    Medicare Part D participation

    Filed 52 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.

    Source: CMS Part D Prescriber PUF

  • Reported

    CMS quality reporting (MIPS)

    Reported a CMS MIPS final score of 84.6/100 in the Quality Payment Program — a federal quality measure, not a patient review.

    Source: CMS Quality Payment Program

  • Reported

    Board certification signal

    Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.

    Source: NUCC taxonomy + CMS participation heuristic

  • 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

    New York statewide board action statistics are published annually — these figures describe aggregate state activity, not Genadij Sienkiewicz, M.D.'s individual license status. Verify directly with the state medical board.

    Source: NYSBPMC 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.

CMS NPPES provider registry desk

NPI 1821036740 · Dermatology Physician

NPI-10 · ENUM-LEGACY · TAX-MID · MIPS-INLINE · RX-TRACE · BOOK-LIGHT · PHOTO-FINISH

  • NPI-10 1821036740
  • ENUM-LEGACY 2006
  • TAX-MID 15K Dermatology Physician
  • MIPS-INLINE 84.6/100
  • RX-TRACE 52
  • BOOK-LIGHT 1,189 in New York
  • PHOTO-FINISH Manisha Manmohan, M.D. · ±0.0

MIPS final-score neighbourhood

Same-specialty nationwide peers by CMS final score, not geographic proximity

MIPS pts

What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).

Source CMS Quality Payment Program (MIPS) As of 2023

Genadij Sienkiewicz, M.D.'s MIPS score vs every measured U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.

85 ≥ 42nd percentile 42% of 454,083 measured providers are in lower value bands

0–10: 8,684 measured providers (2%). Below this entry. 10–20: 3,008 measured providers (1%). Below this entry. 20–30: 3,069 measured providers (1%). Below this entry. 30–40: 2,746 measured providers (1%). Below this entry. 40–50: 2,928 measured providers (1%). Below this entry. 50–60: 5,882 measured providers (1%). Below this entry. 60–70: 13,906 measured providers (3%). Below this entry. 70–80: 94,570 measured providers (21%). Below this entry. 80–90: 129,887 measured providers (29%). This entry sits in this band. 90+: 189,403 measured providers (42%). Above this entry. This provider 0 100 every measured MIPS clinician, bucketed by value

Each bar is a band; taller bars hold more measured providers. 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 whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.

Source CMS Merit-based Incentive Payment System (MIPS) · 2023

Where Genadij Sienkiewicz, M.D. sits

This provider among dermatology physician peers

Across the 5,700 dermatology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Genadij Sienkiewicz, M.D. writes more Part D claims than 3% of them and scores higher on MIPS quality than 42% - placing this provider in the lower-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.

Lower volume · High qualityHigh volume · High qualityLower volume · Lower qualityHigh volume · Lower quality0255075100023.647.370.994.5Part D claim volume, percentile in specialtyMIPS quality, percentilePoint, Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 50Point, Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 12Point, Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 10Point, Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 5Point, Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 87Point, Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 78Point, Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 20Point, Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 52Point, Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 23Point, Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 45Point, Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 70Point, Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 58Point, Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 73Point, Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 13Point, Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 17Point, Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 47Point, Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 60Point, Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 33Point, Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 77Point, Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 43Point, Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 65Point, Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 25Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 82Point, Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 38Point, Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 53Point, Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 8Point, Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 35Point, Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 57Point, Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 7Point, Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 63Point, Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 87Point, Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 40Point, Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 83Point, Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 75Point, Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 83Point, Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 80Point, Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 72Point, Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 35Point, Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 17Point, Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 48Genadij Sienkiewicz, M.D., Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 42
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one dermatology physician peer from a representative sample of 60; the gold marker is Genadij Sienkiewicz, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

✓
Board certification likely (heuristic, not verified)

Genadij Sienkiewicz, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation - 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 Genadij Sienkiewicz, M.D.?

Near national average

NPI registry status

Active

Issued 06/03/2006

NPI 1821036740

Primary specialty

Dermatology Physician

Mid-sized

15,011 US NPIs in this specialty

Medicare Part D claims

52 93% vs specialty avg

2024 prescription claims

Specialty avg: 799

MIPS final score

84.6/100 1.1 pts vs avg

Above neutral band

vs 83.5 national avg

Specialty distribution in New York

How Dermatology Physician compares to other specialties among New York providers

New York providers
Student in an Organized Heal…8%Registered Nurse5.2%Clinical Social Worker4.9%Social Worker4.5%Speech-Language Pathologist4.5%Licensed Practical Nurse4.3%Dermatology Physician0.2%
Largest specialties in New York (% of in-state providers)

Medicare quality performance, MIPS

Genadij Sienkiewicz, M.D.'s 2023 MIPS final score plotted against the Dermatology Physician national average

Near national average
MIPS Final Score
84.6/100
vs 83.5 national avg · 2023 performance year
0%100%National avg84%84.6%
MIPS final score (Dermatology Physician) - 84.6/100 vs national avg 83.5
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

200 FRONT ST
Vestal, NY 13850
(607) 658-1003

Provider Details

NPI 1821036740
Specialty Dermatology Physician
Credentials M.D.
Gender Male
NPI Issued 06/03/2006

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

84.6352
Final Score
Measured-score avg: 83.5
87.9613
Quality
54.4227
Cost
100
Promoting Interoperability

Reporting: Group practice

Hospital and facility affiliations

Facilities where Genadij Sienkiewicz, M.D. 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.

United Health Services Hospitals, Inc.
Candor, NY

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 - 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 Genadij Sienkiewicz, M.D.. To verify Genadij Sienkiewicz, M.D.'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 · Typical

Genadij Sienkiewicz, M.D. - brand share 23.0%
Dermatology Physician average

23% brand-name claims vs 77% generic, on 52 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.

52
Total Claims
$10K
Total Drug Cost
26
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
68
Total Day Supply
1,767
Brand vs Generic
23% brand / 77% generic
Brand Drug Cost
$9K
Generic Drug Cost
$2K

Patient Demographics

Average Patient Age
71.8 years
Avg HCC Risk Score
2.33
More Dermatology Physician in NY → All providers in New York → Compare specialties →

Dermatology Physician Overview

How Genadij Sienkiewicz, M.D. fits within the Dermatology Physician landscape nationally.

15,011
Dermatology Physician Providers in US
53
States with Dermatology Physician
799
Avg Claims per Provider

Genadij Sienkiewicz, M.D.'s 52 claims are below the specialty average of 799.

Nationwide Dermatology Physician peers with similar MIPS or enrollment year

Two federal-record peer sets for Sienkiewicz, both outside New York so the neighborhoods are not geographic containment.

Similar MIPS final score

Nearest same-specialty clinicians by CMS MIPS final score (84.6 here).

Manisha Manmohan 84.6 CA Alexander Chiaramonti 84.7 NC Catherine Hren 84.7 NC Heidi Mangelsdorf 84.7 NC

Same NPPES enumeration year (2006)

Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.

Suwapang Pattummadith Pomona, CA James O'Connell Rancho Mirage, CA Paul Timmermann Roanoke, VA Mary Jung Orange, CA

Nearby Dermatology Physician Providers in New York

Other clinicians with the same primary specialty enrolled in New York, drawn from the same CMS NPPES roster as Sienkiewicz.

One of 1,189 Dermatology Physician providers enrolled in New York, 5 are shown here.

Dr. Jules Abadi
MD
East Patchogue, NY
Dr. Dale Abadir
MD
Rye Brook, NY
Dr. Roxanne Abitbol
M.D.
Oceanside, NY
Dr. Ariel Abraham
M.D.
Southampton, NY
Dr. Peter Accetta
M.D.
Orchard Park, NY

Compare Dermatology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is Genadij Sienkiewicz, M.D.'s specialty? ▼
Genadij Sienkiewicz, M.D. specializes in Dermatology Physician and practices in Vestal, New York. Credentials: M.D..
How much does Genadij Sienkiewicz, M.D. prescribe under Medicare Part D? ▼
In 2024, Genadij Sienkiewicz, M.D. wrote 52 Medicare Part D claims totaling $10K in drug costs for 26 beneficiaries.
What is Genadij Sienkiewicz, M.D.'s Medicare quality score? ▼
Genadij Sienkiewicz, M.D. has a CMS MIPS Final Score of 84.6/100 (Quality: 88, Cost: 54.4). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Genadij Sienkiewicz, M.D. located? ▼
Genadij Sienkiewicz, M.D. is located at 200 FRONT ST, Vestal, NY, 13850. Phone: (607) 658-1003.
What is Genadij Sienkiewicz, M.D.'s NPI number? ▼
Genadij Sienkiewicz, M.D.'s National Provider Identifier (NPI) is 1821036740, issued on 06/03/2006.
Does Genadij Sienkiewicz, M.D. prescribe more brand-name or generic drugs? ▼
Genadij Sienkiewicz, M.D.'s prescribing is 23% brand-name and 77% generic drugs by claim count, with $9K in brand drug costs.
How many Dermatology Physician providers are there in the US? ▼
There are 15,011 Dermatology Physician providers across 53 states in the US. The average Dermatology Physician provider writes 799 Medicare Part D claims per year.
Does Genadij Sienkiewicz, M.D. accept Medicare? ▼
Genadij Sienkiewicz, M.D. appears in CMS Medicare data with 52 Part D claims and 26 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Genadij Sienkiewicz, M.D.'s credentials? ▼
Genadij Sienkiewicz, M.D.'s NPI is 1821036740 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 (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
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

Compiled from official public sources by the editorial process.

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.