Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

William O Passarelli III, MD

Individual provider Cardiovascular Disease Physician · NPI 1285653113

William O Passarelli III, MD is a Cardiovascular Disease (Cardiology) in Pascagoula, Mississippi. Graduated from New York Medical College in 1991, 35 years ago. Practices with Singing River Health System, a 290-clinician group and accepts Medicare assignment. Licensed in Mississippi.

Years since qualifying
35
Trained at
New York Medical College
Licensed in
MS
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

4300 Hospital St Ste 102
Pascagoula, MS 39581-5329
Phone: (228) 762-1002
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence MS17347 (MS)

Record details

NPI number1285653113
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJuly 19, 2006
Last updated in NPPESJune 28, 2021
Certification dateJune 28, 2021
Mailing address4300 Hospital St Ste 102, Pascagoula, MS 39581-5329

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Also practisesINTERNAL MEDICINE
Medical schoolNEW YORK MEDICAL COLLEGE
Graduated 1991 (35 years in practice)
Group practice Singing River Health System — 290 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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