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DR. JAMES MATTHEW DIFFLEY M.D.
NPI 1780974626
Pediatrics in Oakland, CA

Active since April 12, 2011PECOS Enrolled
747 52ND ST, OAKLAND, CA 94609(510) 842-3938 Get Directions Write a Review

NPPES record last updated: February 11, 2022. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. James Matthew Diffley M.d. NPPES

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

DR. JAMES MATTHEW DIFFLEY M.D. (NPI 1780974626) is an individual pediatrics provider in Oakland, California, licensed in California (A114288) and active in the NPI registry since April 2011. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1780974626
Entity TypeIndividualMale
Primary Taxonomy208000000X
Provider Legal NameDR. JAMES MATTHEW DIFFLEYCredential: M.D.
Location Address747 52ND STOakland, CA 94609-1809
Mailing Address747 52nd StOakland, CA 94609-1809 · (510) 842-3938
Phone(510) 842-3938
Sole ProprietorYes
Enumeration DateApril 12, 2011
Last NPPES UpdateFebruary 11, 2022
✔ NPI 1780974626 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in CA · A114288
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.
747 52ND ST, Oakland, CA 94609
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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)

Dr. James Matthew Diffley M.d. 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 94609 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
$104.51 typical visit price
range $69.00 – $202.35
Typical copayment $26.12 (range $17.25 – $50.58)
Most-billed visit code 99203
Established Patient
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
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.

MRS. SHERYL LEE GARCIA RN
Registered Nurse (Pediatrics)
747 52ND ST
OAKLAND, CA 94609
Alameda County (510) 428-3885
ERICA TRINGALE N.P,
Nurse Practitioner (Pediatrics)
747 52ND ST
OAKLAND, CA 94609
Alameda County (510) 428-3373
MRS. NATALIE PLOTKIN MS, ACPNP
Pediatrics (Pediatric Hematology-Oncology)
747 52ND ST
OAKLAND, CA 94609
Alameda County (510) 428-3484
REBECCA ROMANOV MD
Pediatrics
747 52ND ST
OAKLAND, CA 94609
Alameda County (510) 428-3331
SHELLEY ANNE BULL CPNP-PC
Nurse Practitioner (Pediatrics)
747 52ND ST
OAKLAND, CA 94609
Alameda County (510) 428-3885
KARIDA ADETORO
Student in an Organized Health Care Education/Training Program
747 52ND ST
OAKLAND, CA 94609
Alameda County (510) 428-3885
ANNIE ROQUE
Nurse Practitioner (Pediatrics)
747 52ND ST
OAKLAND, CA 94609
Alameda County (510) 428-4418
CHILDREN'S HOSPITAL & RESEARCH CENTER AT OAKLAND
General Acute Care Hospital
747 52ND ST
OAKLAND, CA 94609
Alameda County (510) 428-3885

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 James Diffley's NPI number?

The NPI number for James Diffley is 1780974626. It was assigned to this individual provider in the NPPES registry on April 12, 2011.

Where is James Diffley located?

James Diffley practices at 747 52nd St, Oakland, CA 94609. The listed phone number is (510) 842-3938.

What is James Diffley's specialty?

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

Is James Diffley enrolled in Medicare?

Yes. James Diffley is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for James Diffley was last updated on February 11, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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.