DR. JAMES DOUGLAS MITCHELL MD
NPI 1700057569
Radiology - Radiation Oncology in Walnut Creek, CA

Active since March 19, 2008PECOS EnrolledAccepts Medicare Assignment
575 LENNON LN, WALNUT CREEK, CA 94598(925) 433-8786(925) 433-8788 Get Directions Write a Review

NPPES record last updated: March 3, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. James Douglas Mitchell Md NPPES

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

DR. JAMES DOUGLAS MITCHELL MD (NPI 1700057569) is an individual radiation oncology provider in Walnut Creek, California, licensed in California (A122777) and active in the NPI registry since March 2008. He is enrolled in Medicare PECOS and is a graduate of Tulane University School Of Medicine (2003).

NPPES Registry Identity

NPI1700057569
Entity TypeIndividualMale
Primary Taxonomy2085R0001X
Provider Legal NameDR. JAMES DOUGLAS MITCHELLCredential: MD
Location Address575 LENNON LNWalnut Creek, CA 94598-2443
Mailing Address575 Lennon LnWalnut Creek, CA 94598-2443 · (925) 433-8786 · Fax (925) 433-8788
Fax(925) 433-8788
Sole ProprietorNo
Medical School CMSTulane University School Of MedicineGraduated 2003
Enumeration DateMarch 19, 2008
Last NPPES UpdateMarch 3, 2025
NPPES CertifiedMarch 3, 2025
✔ NPI 1700057569 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Radiation OncologyAllopathic & Osteopathic Physicians
Taxonomy Code2085R0001X
License✔ Licensed in CA · A122777
Definition
A radiologist who deals with the therapeutic applications of radiant energy and its modifiers and the study and management of disease, especially malignant tumors.
575 LENNON LN, Walnut Creek, CA 94598

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. James Douglas Mitchell Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4284803131
PECOS Enrollment IDI20170619002182
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.

Medicare Billing Reassignments

5

Medicare enrollment records show James Mitchell reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Magnetic Resonance Imaging (MRI)
2637 SHADELANDS DR
Walnut Creek, CA 94598
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: Bass Medical Group
  • 347 clinicians in this Medicare group
Trauma Surgery
1601 YGNACIO VALLEY RD
Walnut Creek, CA 94598
  • Reassigned Medicare billing, California enrollment
  • 810 clinicians in this Medicare group
Multi-Specialty
12 CAMINO ENCINAS
Orinda, CA 94563
  • Reassigned Medicare billing, California enrollment
  • 4,479 clinicians in this Medicare group
General Acute Care Hospital
1200 B GALE WILSON BLVD
Fairfield, CA 94533
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: Northbay Physicians Surgery Center, LLC
  • 516 clinicians in this Medicare group
Radiation Oncology
2333 BUCHANAN ST
San Francisco, CA 94115
  • Reassigned Medicare billing, California enrollment
  • 9 clinicians in this Medicare group

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 8

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Intra-fraction localization and tracking of target or patient motion during delivery of radiation therapy (eg,3d positional tracking, gating, 3d surface tracking), each fraction of treatment G6017
In radiation therapy, intra-fraction localization and tracking monitor patient or target movement during treatment. This ensures that radiation is accurately delivered to the correct area. Techniques like 3D positional tracking, gating, and 3D surface tracking are used to enhance precision.
185 services37 patients
Ct guidance for insertion of radiation therapy fields 77014
CT guidance for insertion of radiation therapy fields involves using a CT scan to accurately map the area of your body where radiation will be applied. This ensures the radiation targets only the necessary area, minimizing impact to healthy tissues.
173 services33 patients
Intensity modulated treatment delivery, single or multiple fields/arcs,via narrow spatially and temporally modulated beams, binary, dynamic mlc, per treatment session G6015
Intensity-modulated radiation therapy (IMRT) is a type of cancer treatment. It uses advanced technology to manipulate photon beams of radiation to conform to the shape of a tumor. IMRT allows for the radiation dose to conform more precisely to the three-dimensional shape of the tumor by modulating—or controlling—the intensity of the radiation beam. This can result in better tumor control and less harm to healthy tissue.
168 services28 patients
Ct guidance for insertion of radiation therapy fields 77014
CT guidance for insertion of radiation therapy fields involves using a CT scan to accurately map the area of your body where radiation will be applied. This ensures the radiation targets only the necessary area, minimizing impact to healthy tissues.
50 services24 patients
Continuing radiation therapy consultation per week 77336
Continuing radiation therapy consultation per week involves regular meetings with your healthcare team. These sessions help monitor your progress, manage side effects, and adjust your treatment plan if necessary. It's a key part of ensuring the effectiveness of your radiation therapy.
44 services15 patients
Radiation treatment management, 5 treatment sessions 77427
Radiation treatment management involves a series of 5 sessions where targeted radiation is used to destroy or shrink cancer cells in your body. Each session is carefully planned to maximize effectiveness while minimizing harm to healthy tissues. You may experience side effects which will be closely monitored and managed for your comfort.
42 services13 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94598 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
$202.35 typical visit price
range $69.00 – $202.35
Typical copayment $50.58 (range $17.25 – $50.58)
Most-billed visit code 99205
Established Patient
$84.91 typical visit price
range $23.44 – $166.46
Typical copayment $21.22 (range $5.86 – $41.61)
Most-billed visit code 99213
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 8

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

Radiology (Radiation Oncology)
575 LENNON LN
WALNUT CREEK, CA 94598
Nurse Practitioner
575 LENNON LN
WALNUT CREEK, CA 94598
Internal Medicine (Medical Oncology)
575 LENNON LN
WALNUT CREEK, CA 94598
Internal Medicine (Hematology & Oncology)
575 LENNON LN
WALNUT CREEK, CA 94598
Surgery
575 LENNON LN
WALNUT CREEK, CA 94598
Nurse Practitioner (Family)
575 LENNON LN
WALNUT CREEK, CA 94598
Physician Assistant
575 LENNON LN
WALNUT CREEK, CA 94598
Radiology (Radiation Oncology)
575 LENNON LN
WALNUT CREEK, CA 94598

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 Mitchell's NPI number?

The NPI number for James Mitchell is 1700057569. It was assigned to this individual provider in the NPPES registry on March 19, 2008.

Where is James Mitchell located?

James Mitchell practices at 575 Lennon Ln, Walnut Creek, CA 94598. The listed phone number is (925) 433-8786.

What is James Mitchell's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.

Is James Mitchell enrolled in Medicare?

Yes. James Mitchell is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for James Mitchell's services?

According to the CMS Revalidation Reassignment List (October 2026 release), James Mitchell reassigns Medicare benefits to 5 organizations: Bay Area Surgical Specialists Inc A Medical Corporation (Walnut Creek, CA), John Muir Trauma Physicians Billing Service (Walnut Creek, CA), Sutter Bay Medical Foundation (Orinda, CA), Northbay Healthcare Group (Fairfield, CA) and Northern California Radiation Therapists & Oncologists Medical Group I (San Francisco, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for James Mitchell's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for James Mitchell was last updated on March 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 months 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.