DR. WILLIAM M CHASANOV II D.O.
NPI 1104028919
Internal Medicine - Infectious Disease in Lewes, DE

Q: What is William Chasanov's NPI number?

The NPI number for William Chasanov is 1104028919. It was assigned to this individual provider in the NPPES registry on June 4, 2007.

Q: What is William Chasanov's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Q: When was this NPI record last updated?

The NPPES record for William Chasanov was last updated on February 9, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since June 04, 2007PECOS EnrolledAccepts Medicare Assignment

1535 SAVANNAH RD, LEWES, DE 19958(302) 645-3232(302) 645-3198 Get Directions Write a Review

NPPES record last updated: February 9, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Dec 2, 2024, Jul 18, 2018 (2 updates tracked since 2018).

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About Dr. William M Chasanov Ii D.o. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. WILLIAM M CHASANOV II D.O. (NPI 1104028919) is an individual infectious disease provider in Lewes, Delaware, licensed in Delaware (C7-0003733) and active in the NPI registry since June 2007. He is enrolled in Medicare PECOS, maintains 3 additional practice locations, and is a graduate of Philadelphia College Of Osteopathic Medicine (2007).

NPPES Registry Identity

NPI1104028919

Entity TypeIndividualMale

Primary Taxonomy207RI0200X

Provider Legal NameDR. WILLIAM M CHASANOV IICredential: D.O.

Location Address1535 SAVANNAH RDLewes, DE 19958-1611

Mailing Address1515 Savannah RdLewes, DE 19958-1675 · (302) 645-3499 · Fax (302) 644-4830

Phone(302) 645-3232

Fax(302) 645-3198

Sole ProprietorNo

Medical School CMSPhiladelphia College Of Osteopathic MedicineGraduated 2007

Enumeration DateJune 4, 2007

Last NPPES UpdateFebruary 9, 20262 updates tracked since enumeration

NPPES CertifiedFebruary 9, 2026

✔ NPI 1104028919 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RI0200X

Licenses✔ Licensed in DE · C7-0003733✔ Licensed in NJ · 25MB09331000

Definition

An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.

Also ListedInternal MedicineTaxonomy 207R00000X · License C7-0003773 (DE)

1535 SAVANNAH RD, Lewes, DE 19958

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Secondary Practice Locations 3

Location 13 Cooper Plz Rm 513Camden, NJ 08103-1499 · Phone (856) 963-3715

Location 2424 Savannah RdLewes, DE 19958-1462 · Phone (302) 645-3232 · Fax (888) 987-4578

Location 31 Cooper PlzCamden, NJ 08103 · Phone (856) 963-3518

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include AmeriHealth Caritas Next, Highmark Blue Cross Blue Shield Delaware.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. William M Chasanov Ii D.o. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID547443988

PECOS Enrollment IDI20110323000408

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 19958 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$131.15 typical visit price

range $57.12 – $173.08

Typical copayment $32.78 (range $14.28 – $43.27)

Most-billed visit code 99204

Established Patient

$100.68 typical visit price

range $18.36 – $141.05

Typical copayment $25.17 (range $4.59 – $35.26)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

Reported Quality Measures

Colorectal Cancer Screening

Percentage of adults 50-75 years of age who had appropriate screening for colorectal cancer

36%124 patients2/55-star benchmark: 85%

Diabetes: Eye Exam

Percentage of patients 18-75 years of age with diabetes who had a retinal or dilated eye exam by an eye care professional during the measurement period or a negative retinal exam (no evidence of retinopathy) in the 12 months prior to the measurement period

17%24 patients1/55-star benchmark: 100%

e-Prescribing

At least one permissible prescription written by the MIPS eligible clinician is queried for a drug formulary and transmitted electronically using certified EHR technology.

91%289 patients3/55-star benchmark: 99%

Medication Reconciliation

The MIPS eligible clinician performs medication reconciliation for at least one transition of care in which the patient is transitioned into the care of the MIPS eligible clinician.

99%139 patients4/55-star benchmark: 100%

Patient-Specific Education

The MIPS eligible clinician must use clinically relevant information from CEHRT to identify patient-specific educational resources and provide access to those materials to at least one unique patient seen by the MIPS eligible clinician.

53%187 patients3/55-star benchmark: 97%

Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan

Percentage of patients aged 18 years and older with a BMI documented during the current encounter or during the previous twelve months AND with a BMI outside of normal parameters, a follow-up plan is documented during the encounter or during the previous…

34%190 patients2/55-star benchmark: 97%

Provide Patient Access

At least one patient seen by the MIPS eligible clinician during the performance period is provided timely access to view online, download, and transmit to a third party their health information subject to the MIPS eligible clinician's discretion to withhold…

97%187 patients4/55-star benchmark: 100%

Secure Messaging

For at least one unique patient seen by the MIPS eligible clinician during the performance period, a secure message was sent using the electronic messaging function of CEHRT to the patient (or the patient-authorized representative), or in response to a secure…

19%187 patients1/55-star benchmark: 89%

View, Download, or Transmit (VDT)

At least one patient seen by the MIPS eligible clinician during the performance period (or patient-authorized representative) views, downloads or transmits their health information to a third party during the performance period.

33%187 patients

Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Other Providers at the Same Location NPPES 17

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

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