William A. Horn, MD
Dermatology Physician · Hatboro, PA
William A. Horn, MD is a dermatology physician with a practice address in Hatboro, Pennsylvania, and NPI 1720016538, issued on Jun 29, 2006. Check the license (Pennsylvania MD029516E, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- William A. Horn
- Credential
- MD
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- MD029516E PA
Self-reported in NPPES; status is on the state search - Practice location
- 331 N York RD, Hatboro, PA 19040
- Phone
- (215) 672-5260
- Enumerated
- Jun 29, 2006
- Record last updated
- May 21, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (215) 672-5287
- Medicare enrollment
- Enrolled (PECOS I20100914001238); accepts Medicare assignment
- Medical or professional school
- Perelman School Of Med At The University Of Pennsylvania, 1982
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 681 in Pennsylvania → Look up another NPI →
Also registered at 331 N York RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ercem Atillasoy, MDDermatology Physician1093751992
- Jacqueline Burkhardt, ODOptometrist1902842933
- Francis Clark, MDOphthalmology Physician1043202930
- Maria Martinez Lehmann, M.D.Ophthalmology Physician1851749469
- Bhavika Patel, O.D.Optometrist1689903718
Verify William A. Horn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD029516ECheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5% more Medicare Part D claims than the average dermatology physician in 2024
838 Medicare Part D claims for 312 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims.
Most prescribed
- Ketoconazole175 claims
- Triamcinolone Acetonide96 claims
- Clobetasol Propionate70 claims
- Doxycycline Hyclate68 claims
- Valacyclovir42 claims
- Hydrocortisone38 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $498.12
4 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Biotech, Inc. The 10,250 providers of this specialty with any payment received $8,544.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
William A. Horn among 681 dermatology physician records in Pennsylvania
William A. Horn, MD is one of 681 dermatology physician records with a practice address in Pennsylvania. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 14% of them.
- NPI issued2006 · 14% of these records are older, 57% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1982 · median 2007 among the 485 with a school on file
- Record last updated2009 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207N00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
3 dermatology physician records list a practice address in Hatboro
They are 3 of the 245 NPPES records with a practice address in Hatboro, and 681 dermatology physician records in Pennsylvania.
All 681 in Pennsylvania → Every provider in Hatboro → Dermatology Physician nationwide →
The 8 dermatology physician records with the nearest ZIP codes
- Ercem Atillasoy, MDHatboro, PA 190401093751992
- John Werber, M.D.Hatboro, PA 190401033301023
- Nina Abraham, MDHaverford, PA 190411255593422
- Franziska Ringpfeil, MDHaverford, PA 190411760471619
- Diana Brown, MDWyndmoor, PA 190381326020660
- Casey Barry, MDFt Washington, PA 190341548766124
- Marie Carlin, MDFt Washington, PA 190341992788202
- Robert Fox, M.D.Jenkintown, PA 190461679517726
Common questions
What is William A. Horn, MD's NPI number?
William A. Horn, MD's National Provider Identifier (NPI) is 1720016538, issued on Jun 29, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William A. Horn, MD located?
The NPPES record lists a practice address at 331 N York RD, Hatboro, PA, 19040. Phone: (215) 672-5260. Providers update this record themselves, so call before visiting.
How can I verify William A. Horn, MD's license?
NPPES lists Pennsylvania license number MD029516E, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William A. Horn, MD prescribe under Medicare Part D?
In 2024, William A. Horn, MD had 838 Medicare Part D claims for 312 beneficiaries; the average among dermatology physician prescribers was 797. Part D covers Medicare prescriptions only.
What is William A. Horn, MD's MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.