William Clack, MD
NPI 1053490805 · Dermatology Physician · Elmira, NY
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Clack, MD is a Dermatology Physician provider in Elmira, NY (NPI 1053490805).
Provider details
- NPI number
- 1053490805
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 1181211 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
272 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 119 | $62 |
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 79 | $2 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 48 | $47 |
| Destruction of Skin Growth, 1-14 Growths17110 | 26 | $65 |
Typical Medicare-allowed amounts for these services range $2–$65 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Triamcinolone Acetonide | 67 | 39 |
| Ketoconazole | 40 | 14 |
| Finasteride | 31 | — |
| Hydrocortisone | 17 | — |
| Methotrexate Sodiumbrand: Methotrexate | 17 | — |
| Fluorouracil | 16 | 14 |
| Metronidazole | 15 | — |
| Hydroxyzine Pamoate | 12 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-03
- Last updated
- 2020-11-24
- Certified
- 2020-11-24
Frequently asked questions
- What is William Clack's NPI number?
- William Clack's National Provider Identifier (NPI) is 1053490805, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Clack's specialty?
- William Clack is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is William Clack located?
- William Clack's practice location on file with NPPES is 200 Madison Ave Ste 2b, Elmira, NY 14901-3219.
- What is William Clack's phone number?
- The practice phone number listed in the NPPES registry for William Clack is (607) 732-1310.
- Does William Clack accept Medicare?
- William Clack is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Clack's NPI active?
- Yes — William Clack's NPI (1053490805) is active in the NPPES registry as of the last update on 2020-11-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.