William Lenox Pfaff, M.D.
Orthopaedic Surgery of the Spine Physician · Rehoboth Beach, DE
William Lenox Pfaff, M.D. is an orthopaedic surgery of the spine physician with a practice address in Rehoboth Beach, Delaware, and NPI 1346415411, issued on Apr 29, 2008. Check the license (Delaware C10008913, as entered in NPPES) on the Delaware Board of Medical Licensure and Discipline; the Medicare figures below come from public CMS files.
- Name
- William Lenox Pfaff
- Credential
- M.D.
- Primary taxonomy
- Orthopaedic Surgery of the Spine Physician 207XS0117X
- License numbers
- C10008913 DE
MD429103 PA
Self-reported in NPPES; status is on the state search - Practice location
- 18947 John J Williams Hwy, Rehoboth Beach, DE 19971
- Phone
- (302) 231-4333
- Enumerated
- Apr 29, 2008
- Record last updated
- Jun 14, 2023
- Fax
- (302) 231-4414
- Medicaid ID
- 1346415411 DE
- Medicare enrollment
- Enrolled (PECOS I20090720000401); accepts Medicare assignment
- Medical or professional school
- Jefferson Medical College Of Thomas Jefferson University, 2003
- Entity
- Type 1 · individual
Also registered at 18947 John J Williams Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Noor Al-RashidPhysician Assistant1891269858
- Nouman Asif, M.D.Hematology & Oncology Physician1790947174
- Amanda Bendett, MPH, BSN, RNCase Management Registered Nurse1346008406
- Martin Blood, BS RPHOncology Pharmacist1477950384
- Jeffrey Boxer, MDPediatrics Physician1659353217
- Jeffrey Cooper, D.M.D.General Practice Dentistry1801005475
Verify William Lenox Pfaff in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersDelaware Board of Medical Licensure and Discipline
Search for license C10008913Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.1 times the Medicare Part D claims of the average orthopaedic surgery of the spine physician in 2024
815 Medicare Part D claims for 139 beneficiaries, against an average of 381 among the 1,714 providers of this specialty who prescribed in Part D. Brand-name drugs were 2% of claims. 330 claims were for opioids.
Most prescribed
- Diazepam192 claims
- Hydrocodone-Acetaminophen140 claims
- Gabapentin74 claims
- Oxycodone-Acetaminophen74 claims
- Oxycodone Hcl46 claims
- Tramadol Hcl46 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.
Industry payments in 2024: $176.08
3 payments; by number, the most common kind was food and beverage; the largest payer was Abbott Laboratories. The 1,726 providers of this specialty with any payment received $34,071.55 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.
Orthopaedic Surgery of the Spine Physician providers in Delaware
There are 7 orthopaedic surgery of the spine physician records in Delaware.
Other orthopaedic surgery of the spine physician records in Delaware
- Mark Eskander, M.D.Wilmington, DE1285694935
- Kalin Fisher, MDNewark, DE1275881195
- Stephen Malone, M.D.Dover, DE1356377204
- Nicholas Minissale, DOLewes, DE1558922153
- Bruce Rudin, MDNewark, DE1871564856
- James Zaslavsky, DONewark, DE1700092616
Common questions
What is William Lenox Pfaff, M.D.'s NPI number?
William Lenox Pfaff, M.D.'s National Provider Identifier (NPI) is 1346415411, issued on Apr 29, 2008. An NPI identifies a provider in billing; it is not a license.
Where is William Lenox Pfaff, M.D. located?
The NPPES record lists a practice address at 18947 John J Williams Hwy, Rehoboth Beach, DE, 19971. Phone: (302) 231-4333. Providers update this record themselves, so call before visiting.
How can I verify William Lenox Pfaff, M.D.'s license?
NPPES lists Delaware license number C10008913, as entered by the provider. Search the Delaware Board of Medical Licensure and Discipline at https://delpros.delaware.gov/OH_VerifyLicense. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Lenox Pfaff, M.D. prescribe under Medicare Part D?
In 2024, William Lenox Pfaff, M.D. had 815 Medicare Part D claims for 139 beneficiaries; the average among orthopaedic surgery of the spine physician prescribers was 381. Part D covers Medicare prescriptions only.
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.