William Holder, (M.D.,
William Holder is an Internal Medicine specialist based in Parsippany, NJ with over 45 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
William Holder, (M.D., runs an independent internist practice in Parsippany, NJ. He has been practicing since 2007 — over 45 years. A physician who provides long-term, comprehensive care in the office and the hospital.
Older · 380dNPPES updated 2025-05-08 · verify NPI on CMS · Verify license at New Jersey State Board of Medical Examiners
Contact & Location
Practice Location
285 N Beverwyck Rd, Parsippany, NJ 07054-2252
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Board certified · May 7, 2025
Self-reported via NPPES
45 years in practice
Senior practitioner
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Taxonomy: 207R00000X
Virtual Internal Medicine Care With William Holder
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with William Holder for follow-ups, medication reviews, and ongoing care — no travel to Parsippany required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.
Frequently Asked Questions
Common questions about William Holder
NPI records show Dr. Holder as active with telehealth listed in Parsippany, NJ. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (973) 331-9774.
Sourced from CMS NPPES · OIG LEIE. See Data Methodology.
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Contact William Holder
Practice Location
285 N Beverwyck Rd, Parsippany, NJ 07054-2252
Mailing Address
285 N Beverwyck Rd, Parsippany, NJ 07054-2252
This is a provider directory. Contact the office directly to schedule appointments.
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