WILLIAM O PASSARELLI III MD
NPI 1285653113
Internal Medicine - Cardiovascular Disease in Pascagoula, MS

Active since July 19, 2006PECOS EnrolledAccepts Medicare Assignment
90.13/100
CMS Quality Rating
4300 HOSPITAL ST STE 102, PASCAGOULA, MS 39581(228) 762-1002 Get Directions Write a Review

NPPES record last updated: June 28, 2021. Verified against the NPPES registry weekly; last sync: July 19, 2026.

About William O Passarelli Iii Md NPPES

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

WILLIAM O PASSARELLI III MD (NPI 1285653113) is an individual cardiovascular disease provider in Pascagoula, Mississippi, licensed in Mississippi (MS17347) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Merit Health Biloxi, and is a graduate of New York Medical College (1991).

NPPES Registry Identity

NPI1285653113
Entity TypeIndividualMale
Primary Taxonomy207RC0000X
Provider Legal NameWILLIAM O PASSARELLI IIICredential: MD
Location Address4300 HOSPITAL ST STE 102Pascagoula, MS 39581-5329
Mailing Address4300 Hospital St Ste 102Pascagoula, MS 39581-5329 · (228) 762-1002
Sole ProprietorYes
Medical School CMSNew York Medical CollegeGraduated 1991
Enumeration DateJuly 19, 2006
Last NPPES UpdateJune 28, 2021
NPPES CertifiedJune 28, 2021
NPI 1285653113 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RC0000X
License Licensed in MS · MS17347
Definition

An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.

4300 HOSPITAL ST STE 102, Pascagoula, MS 39581

Other Identifiers 1

Medicaid0815455669MS

Accepted 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

William O Passarelli Iii Md 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 ID749345106
PECOS Enrollment IDI20090218000371
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.

Areas of Expertise CMS Part B claims 49

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month 99490
Chronic care management services involve a healthcare professional directing clinical staff in managing your chronic conditions. This includes the first 20 minutes per month of services like medication management, care coordination, and health monitoring to help improve your health and quality of life.
1,225 services187 patients
Remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days 99454
This service involves using devices to remotely track body functions like heart rate or blood pressure. These devices, provided initially, record data daily or send alerts if readings are abnormal. The service is renewed every 30 days.
1,071 services268 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
940 services644 patients
Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month 99439
Chronic Care Management services involve regular check-ins with healthcare professionals to manage two or more chronic conditions. It includes an additional 20 minutes of clinical staff time per month, directed by a healthcare professional, to ensure optimal health management.
638 services152 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000
An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.
573 services490 patients
Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306
This is a heart ultrasound, also known as an echocardiogram. It uses sound waves to create pictures of your heart, showing how blood flows through it. The color depicts the blood flow's speed and direction. It also checks the heart's valves to ensure they're working properly.
483 services475 patients

Hospital Affiliations CMS Care Compare 4

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Merit Health Biloxi

Acute Care Hospitals · Biloxi, MS
2/5 CMS rating
OwnershipProprietary
CMS Certification Number250007
Location150 Reynoir StreetBiloxi, MS 39530 · Harrison County
Emergency services Birthing friendly

Memorial Hospital At Gulfport

Acute Care Hospitals · Gulfport, MS
2/5 CMS rating
OwnershipGovernment - Local
CMS Certification Number250019
Location4500 13th StreetGulfport, MS 39502 · Harrison County
Emergency services Birthing friendly

Singing River Health System

Acute Care Hospitals · Pascagoula, MS
2/5 CMS rating
OwnershipGovernment - Local
CMS Certification Number250040
Location2809 Denny AvenuePascagoula, MS 39581 · Jackson County
Emergency services Birthing friendly

Singing River Gulfport

Acute Care Hospitals · Gulfport, MS
1/5 CMS rating
OwnershipProprietary
CMS Certification Number250123
Location15200 Community RoadGulfport, MS 39503 · Harrison County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 39581 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
$120.41 typical visit price
range $51.65 – $159.18
Typical copayment $30.10 (range $12.91 – $39.79)
Most-billed visit code 99204
Established Patient
$64.96 typical visit price
range $16.15 – $129.61
Typical copayment $16.24 (range $4.03 – $32.40)
Most-billed visit code 99213
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.

90.13/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality80.26
Improvement Activities40

Reported Quality Measures

ACCPin3 Heart Failure: Patient Self Care Education
Patients, age 18 and older, with a principle diagnosis of heart failure (LVEF <40) who received educational counseling on weight monitoring, sodium restriction, physical activity and medication instruction.
89%158 patients4/55-star benchmark: 99%
Atrial Fibrillation and Atrial Flutter: Chronic Anticoagulation Therapy
Percentage of patients aged 18 years and older with nonvalvular atrial fibrillation (AF) or atrial flutter who were prescribed warfarin OR another FDA- approved anticoagulant drug for the prevention of thromboembolism during the measurement period
91%397 patients4/55-star benchmark: 100%
Cardiac Rehabilitation Patient Referral from an Outpatient Setting
Percentage of patients evaluated in an outpatient setting who within the previous 12 months have experienced an acute myocardial infarction (MI), coronary artery bypass graft (CABG) surgery, a percutaneous coronary intervention (PCI), cardiac valve surgery…
58%302 patients3/55-star benchmark: 91%
Care Plan
Percentage of patients aged 65 years and older who have an advance care plan or surrogate decision maker documented in the medical record that an advance care plan was discussed but the patient did not wish or was not able to name a surrogate decision maker…
100%1,209 patients5/55-star benchmark: 100%
Coronary Artery Disease (CAD): Antiplatelet Therapy
Percentage of patients aged 18 years and older with a diagnosis of coronary artery disease (CAD) seen within a 12 month period who were prescribed aspirin or clopidogrel
97%1,007 patients4/55-star benchmark: 100%
Diabetes: Medical Attention for Nephropathy
The percentage of patients 18-75 years of age with diabetes who had a nephropathy screening test or evidence of nephropathy during the measurement period
93%349 patients4/55-star benchmark: 100%
Documentation of Current Medications in the Medical Record
Percentage of visits for patients aged 18 years and older for which the eligible professional or eligible clinician attests to documenting a list of current medications using all immediate resources available on the date of the encounter.
100%3,906 patients5/55-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.
98%7,991 patients4/55-star benchmark: 100%
Ischemic Vascular Disease (IVD): Use of Aspirin or Another Antiplatelet
Percentage of patients 18 years of age and older who were diagnosed with acute myocardial infarction (AMI), coronary artery bypass graft (CABG) or percutaneous coronary interventions (PCI) in the 12 months prior to the measurement period, or who had an active…
94%993 patients4/55-star benchmark: 100%
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%3,622 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.
79%2,020 patients4/55-star benchmark: 100%
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…
100%2,089 patients5/55-star benchmark: 100%
Preventive Care and Screening: Tobacco Use: Screening and Cessation Intervention
Percentage of patients aged 18 years and older who were screened for tobacco use one or more times within 24 months AND who received tobacco cessation intervention if identified as a tobacco user
96%192 patients4/55-star benchmark: 100%
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…
94%2,020 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…
2%2,020 patients1/55-star benchmark: 79%
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.

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431
DME-Oxygen and Supplies · category DC000N
2 suppliers11 claims11 services$16.02 avg. paid by Medicare
Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
3 suppliers22 claims22 services$83.10 avg. paid by Medicare
Portable oxygen concentrator, rental E1392
DME-Oxygen and Supplies · category DC002N
2 suppliers11 claims11 services$30.92 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 5

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

Internal Medicine (Cardiovascular Disease)
4300 HOSPITAL ST STE 102
PASCAGOULA, MS 39581
Internal Medicine (Cardiovascular Disease)
4300 HOSPITAL ST STE 102
PASCAGOULA, MS 39581
Internal Medicine (Cardiovascular Disease)
4300 HOSPITAL ST STE 102
PASCAGOULA, MS 39581
Nurse Practitioner (Family)
4300 HOSPITAL ST STE 102
PASCAGOULA, MS 39581
Nurse Practitioner (Acute Care)
4300 HOSPITAL ST STE 102
PASCAGOULA, MS 39581

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Passarelli's NPI number?

The NPI number for William Passarelli is 1285653113. It was assigned to this individual provider in the NPPES registry on July 19, 2006.

Where is William Passarelli located?

William Passarelli practices at 4300 Hospital St Ste 102, Pascagoula, MS 39581. The listed phone number is (228) 762-1002.

What is William Passarelli's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is William Passarelli enrolled in Medicare?

Yes. William Passarelli is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does William Passarelli accept?

Health plans from Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Magnolia Health, Ambetter of Alabama and Ambetter of Tennessee and 4 other insurers list William Passarelli as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is William Passarelli affiliated with any hospitals?

According to CMS data, William Passarelli is affiliated with Merit Health Biloxi, Memorial Hospital At Gulfport, Singing River Health System and Singing River Gulfport.

When was this NPI record last updated?

The NPPES record for William Passarelli was last updated on June 28, 2021. NPI Profile syncs with the weekly NPPES data releases published by CMS.