Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

WILLIAM DUFFICY MD (EXPECTED 5/2018)
NPI 1033615984
Pediatrics in Santa Cruz, CA

Q: What is William Dufficy's NPI number?

The NPI number for William Dufficy is 1033615984. It was assigned to this individual provider in the NPPES registry on March 31, 2018.

Q: What is William Dufficy's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Q: When was this NPI record last updated?

The NPPES record for William Dufficy was last updated on August 3, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 days 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 March 31, 2018PECOS Enrolled

1510 CAPITOLA RD, SANTA CRUZ, CA 95062(831) 427-3500(831) 457-2486 Get Directions Write a Review

NPPES record last updated: August 3, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Aug 3, 2026, May 9, 2024, Nov 1, 2023 and 1 more (4 updates tracked since 2018).

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About William Dufficy Md (expected 5/2018) NPPES

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

WILLIAM DUFFICY MD (EXPECTED 5/2018) (NPI 1033615984) is an individual pediatrics provider in Santa Cruz, California, licensed in California (A180816) and active in the NPI registry since March 2018. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1033615984

Entity TypeIndividualMale

Primary Taxonomy208000000X

Provider Legal NameWILLIAM DUFFICYCredential: MD (EXPECTED 5/2018)

Location Address1510 CAPITOLA RDSanta Cruz, CA 95062-2912

Mailing AddressPo Box 542Santa Cruz, CA 95061-0542 · (831) 427-3500 · Fax (831) 427-7785

Phone(831) 427-3500

Fax(831) 457-2486

Sole ProprietorNo

Enumeration DateMarch 31, 2018

Last NPPES UpdateAugust 3, 20264 updates tracked since enumeration

NPPES CertifiedAugust 3, 2026

✔ NPI 1033615984 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians

Taxonomy Code208000000X

License✔ Licensed in CA · A180816

Definition

A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.

1510 CAPITOLA RD, Santa Cruz, CA 95062

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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

William Dufficy Md (expected 5/2018) is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 95062 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

$96.03 typical visit price

range $62.97 – $186.69

Typical copayment $24.00 (range $15.74 – $46.67)

Most-billed visit code 99203

Established Patient

$109.72 typical visit price

range $21.02 – $153.16

Typical copayment $27.43 (range $5.25 – $38.29)

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.

Other Providers at the Same Location NPPES 20

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

KATHLEEN C HILTON N.P.

Nurse Practitioner (Family)