NPI registry status
Active
2026 NPPES data Dermatology Physician NPI 1053490805 MD
Verify on CMS → William Clack, MD
Dermatology Physician in Elmira, 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
300
Medicare Part D claims · 93 beneficiaries · Dermatology Physician avg: 799
MIPS score
81.3/100
▼ 2 pts below national avg 83.5 · Above neutral
What the federal data shows
William Clack, MD reported a CMS MIPS final score of 81.3/100 - below the 83.5 national average - and filed 300 Medicare Part D claims in 2024.
- 81.3/100
- MIPS score · -2 vs avg
- 300
- Part D claims, 2024
- Likely
- board-certified (heuristic)
- ≥32nd
- pct among measured MIPS (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 William Clack, MD
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 1053490805), first enumerated 11/03/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 300 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 81.3/100 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.
- 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 William Clack, MD'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 1053490805 · Dermatology Physician
NPI-10 · ENUM-LEGACY · TAX-MID · MIPS-INLINE · RX-LIGHT · BOOK-LIGHT · PHOTO-FINISH
- NPI-10 1053490805
- ENUM-LEGACY 2006
- TAX-MID 15K Dermatology Physician
- MIPS-INLINE 81.3/100
- RX-LIGHT 300
- BOOK-LIGHT 1,189 in New York
- PHOTO-FINISH Alyx Aigen · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Clack · this pro…
Clack · this provider
81.3 MIPS pts
- Danyelle Dawes ·…
Danyelle Dawes
81.3 MIPS pts
- Alyx Aigen · near
Alyx Aigen
81.3 MIPS pts
- Fernanda Bellodi…
Fernanda Bellodi Schmidt
81.3 MIPS pts
- Ivan Camacho · n…
Ivan Camacho
81.3 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
William Clack, MD'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.
81 ≥ 32nd percentile 32% of 454,083 measured providers are in lower value bands
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 William Clack, MD 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, William Clack, MD writes more Part D claims than 20% of them and scores higher on MIPS quality than 32% - placing this provider in the lower-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one dermatology physician peer from a representative sample of 60; the gold marker is William Clack, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
William Clack, MD 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 William Clack, MD?
Near national averagePrimary specialty
Dermatology Physician
Medicare Part D claims
300 62% vs specialty avg
MIPS final score
81.3/100 2.2 pts vs avg
Specialty distribution in New York
How Dermatology Physician compares to other specialties among New York providers
Medicare quality performance, MIPS
William Clack, MD's 2023 MIPS final score plotted against the Dermatology Physician national average
- MIPS Final Score
- 81.3/100
- vs 83.5 national avg · 2023 performance year
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 | 1053490805 |
|---|---|
| Specialty | Dermatology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 11/03/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
81.3099
Final Score
Measured-score avg: 83.5
61.8029
Quality
65.2131
Cost
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where William Clack, 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.
Arnot Ogden Medical Center
★★☆☆☆ 2/5
Elmira, NY
Acute Care Hospitals
CMS CCN: 330090
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 William Clack, MD. To verify William Clack, MD'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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
300
Total Claims
$61K
Total Drug Cost
93
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 386
- Total Day Supply
- 10,961
- Generic Drug Cost
- $7K
- Antibiotic Claims
- 18
Patient Demographics
- Average Patient Age
- 71.0 years
- Avg HCC Risk Score
- 1.39
- Gender Split
- 53% female / 47% male
- Age Distribution
- <65: 20, 65-74: 36, 75-84: 25, 85+: 12
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What William Clack, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Triamcinolone Acet…
Triamcinolone Acetonide
67 claims
- Ketoconazole
Ketoconazole
40 claims
- Finasteride
Finasteride
31 claims
- Hydrocortisone 17
Hydrocortisone
17 claims
- Methotrexate 17
Methotrexate
17 claims
- Fluorouracil 16
Fluorouracil
16 claims
- Metronidazole 15
Metronidazole
15 claims
- Hydroxyzine Pamoate 12
Hydroxyzine Pamoate
12 claims
| Drug | Claims |
|---|---|
| Triamcinolone Acetonide | 67 |
| Ketoconazole | 40 |
| Finasteride | 31 |
| Hydrocortisone | 17 |
| Methotrexate Methotrexate Sodium | 17 |
| Fluorouracil | 16 |
| Metronidazole | 15 |
| Hydroxyzine Pamoate | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Dermatology Physician Overview
How William Clack, MD fits within the Dermatology Physician landscape nationally.
15,011
Dermatology Physician Providers in US
53
States with Dermatology Physician
799
Avg Claims per Provider
William Clack, MD's 300 claims are below the specialty average of 799.
Nationwide Dermatology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Clack, both outside New York so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (81.3 here).
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
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 Clack.
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 William Clack, MD's specialty? ▼
William Clack, MD specializes in Dermatology Physician and practices in Elmira, New York. Credentials: MD.
How much does William Clack, MD prescribe under Medicare Part D? ▼
In 2024, William Clack, MD wrote 300 Medicare Part D claims totaling $61K in drug costs for 93 beneficiaries.
What is William Clack, MD's Medicare quality score? ▼
William Clack, MD has a CMS MIPS Final Score of 81.3/100 (Quality: 61.8, Cost: 65.2). 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 William Clack, MD located? ▼
William Clack, MD is located at 200 MADISON AVE STE 2B, Elmira, NY, 14901. Phone: (607) 732-1310.
What is William Clack, MD's NPI number? ▼
William Clack, MD's National Provider Identifier (NPI) is 1053490805, issued on 11/03/2006.
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.
What drugs does William Clack, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, William Clack, MD's most frequently prescribed drugs include Triamcinolone Acetonide, Ketoconazole, Finasteride. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does William Clack, MD accept Medicare? ▼
William Clack, MD appears in CMS Medicare data with 300 Part D claims and 93 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify William Clack, MD's credentials? ▼
William Clack, MD's NPI is 1053490805 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.
- 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
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.