1. Home
  2. Directory
  3. California
  4. Martinez
  5. Preventive Medicine
  6. NPI Profile

JULIE M. NEFKENS MD
NPI 1417029240
Preventive Medicine - Occupational Medicine in Martinez, CA

Active since November 15, 2006PECOS Enrolled
200 MUIR RD, MARTINEZ, CA 94553(925) 372-1000 Get Directions Write a Review

NPPES record last updated: January 11, 2022. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Julie M. Nefkens Md NPPES

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

JULIE M. NEFKENS MD (NPI 1417029240) is an individual occupational medicine provider in Martinez, California, licensed in California (G71955) and active in the NPI registry since November 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1417029240
Entity TypeIndividualFemale
Primary Taxonomy2083X0100X
Provider Legal NameJULIE M. NEFKENSCredential: MD
Location Address200 MUIR RDMartinez, CA 94553-4614
Mailing Address1800 Harrison St Fl 7Oakland, CA 94612-3466 · (510) 625-6262
Phone(925) 372-1000
Sole ProprietorNo
Enumeration DateNovember 15, 2006
Last NPPES UpdateJanuary 11, 2022
✔ NPI 1417029240 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPreventive Medicine · Occupational MedicineAllopathic & Osteopathic Physicians
Taxonomy Code2083X0100X
License✔ Licensed in CA · G71955
Definition
Occupational medicine focuses on the health of workers, including the ability to perform work; the physical, chemical, biological, and social environments of the workplace; and the health outcomes of environmental exposures. Practitioners in this field address the promotion of health in the work place, and the prevention and management of occupational and environmental injury, illness, and disability.
200 MUIR RD, Martinez, CA 94553
Open in Google Maps ↗

Other Names 1

Other Name (5)Julie Marie Kirchberg

Other Identifiers 1

Medicaid00G719550CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Julie M. Nefkens Md 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 94553 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
$153.83 typical visit price
range $69.00 – $202.35
Typical copayment $38.45 (range $17.25 – $50.58)
Most-billed visit code 99204
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.

TIFFANY HO PHARMD
Pharmacist
200 MUIR RD
MARTINEZ, CA 94553
Contra Costa County (408) 598-0507
JOANNE AMALA SUPERSAD MD
Pediatrics (Adolescent Medicine)
200 MUIR RD
MARTINEZ, CA 94553
Contra Costa County (925) 372-1000
CLARISSE ANNE R. WONG MD
Family Medicine
200 MUIR RD
MARTINEZ, CA 94553
Contra Costa County (925) 372-1999
MISS UYEN DO
Pharmacist
200 MUIR RD
MARTINEZ, CA 94553
Contra Costa County (925) 313-4544
JULIA ANN GEARHART MS, CCC-SLP
Speech-Language Pathologist
200 MUIR RD, HOME HEALTH OFFICES
MARTINEZ, CA 94553
Contra Costa County (925) 595-3684
YOLANDA TRUE RPH
Pharmacist
200 MUIR RD
MARTINEZ, CA 94553
Contra Costa County (925) 313-4051
ANNE RUSSELL PT
Physical Therapist
200 MUIR RD, KAISER HOME HEALTH AGENCY
MARTINEZ, CA 94553
Contra Costa County (925) 313-4668
DIANE MILWARD R.D., C.D.E
Dietitian, Registered
200 MUIR RD
MARTINEZ, CA 94553
Contra Costa County (925) 313-4743

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 Julie Nefkens's NPI number?

The NPI number for Julie Nefkens is 1417029240. It was assigned to this individual provider in the NPPES registry on November 15, 2006. The provider is also known as Julie Marie Kirchberg.

Where is Julie Nefkens located?

Julie Nefkens practices at 200 Muir Rd, Martinez, CA 94553. The listed phone number is (925) 372-1000.

What is Julie Nefkens's specialty?

The primary specialty registered for this NPI is Preventive Medicine, specializing in Occupational Medicine, with taxonomy code 2083X0100X.

Is Julie Nefkens enrolled in Medicare?

Yes. Julie Nefkens is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Julie Nefkens was last updated on January 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.