William Chasanov, D.O.
NPI 1104028919 · Infectious Disease Physician · Lewes, DE
Enrolled with Medicare as Practitioner - Infectious Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Chasanov, D.O. is a Infectious Disease Physician provider in Lewes, DE (NPI 1104028919).
Provider details
- NPI number
- 1104028919
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- C7-0003733 (DE)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
4 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 2 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Raltegravir Potassiumbrand: Isentress | 12 |
| Abacavir/Dolutegravir/Lamivudibrand: Triumeq | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$53 across 3 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (3)
- 424 Savannah RdLewes, DE 19958-1462Phone: (302) 645-3232Fax: (888) 987-4578
- 3 Cooper Plz Rm 513Camden, NJ 08103-1499Phone: (856) 963-3715
- 1 Cooper PlzCamden, NJ 08103Phone: (856) 963-3518
Registry dates
- Enumerated
- 2007-06-04
- Last updated
- 2026-02-09
- Certified
- 2026-02-09
Frequently asked questions
- What is William Chasanov's NPI number?
- William Chasanov's National Provider Identifier (NPI) is 1104028919, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Chasanov's specialty?
- William Chasanov is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is William Chasanov located?
- William Chasanov's practice location on file with NPPES is 1535 Savannah Rd, Lewes, DE 19958-1611.
- What is William Chasanov's phone number?
- The practice phone number listed in the NPPES registry for William Chasanov is (302) 645-3232.
- Does William Chasanov accept Medicare?
- William Chasanov is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Chasanov's NPI active?
- Yes — William Chasanov's NPI (1104028919) is active in the NPPES registry as of the last update on 2026-02-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.