JAMES WILLIS SIMMONS II NP
NPI 1366744492
Nurse Practitioner - Family in Redwood City, CA
About James Willis Simmons Ii Np NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JAMES WILLIS SIMMONS II NP (NPI 1366744492) is an individual family provider in Redwood City, California, licensed in California (NP19879) and active in the NPI registry since November 2010. He is enrolled in Medicare PECOS, maintains a secondary practice location in Modesto, and is a graduate of Other (2010).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
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
James Willis Simmons Ii Np 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.
Medicare Billing Reassignments
10Medicare enrollment records show James Simmons reassigns Medicare billing to 10 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Redwood City, CA 94062
- Reassigned Medicare billing, California enrollment
- 182 clinicians in this Medicare group
Fremont, CA 94538
- Reassigned Medicare billing, California enrollment
- 41 clinicians in this Medicare group
Oakland, CA 94609
- Reassigned Medicare billing, California enrollment
- 118 clinicians in this Medicare group
Tracy, CA 95376
- Reassigned Medicare billing, California enrollment
- 57 clinicians in this Medicare group
Fairfield, CA 94533
- Reassigned Medicare billing, California enrollment
- 212 clinicians in this Medicare group
Modesto, CA 95355
- Reassigned Medicare billing, California enrollment
- 34 clinicians in this Medicare group
Merced, CA 95340
- Reassigned Medicare billing, California enrollment
- 21 clinicians in this Medicare group
Redding, CA 96001
- Reassigned Medicare billing, California enrollment
- 63 clinicians in this Medicare group
San Bernardino, CA 92404
- Reassigned Medicare billing, California enrollment
- 1,216 clinicians in this Medicare group
Knoxville, TN 37922
- Reassigned Medicare billing, California enrollment
- 23 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 3
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94063 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Simmons's NPI number?
The NPI number for James Simmons is 1366744492. It was assigned to this individual provider in the NPPES registry on November 22, 2010.
Where is James Simmons located?
James Simmons practices at 830 Jefferson Ave, Redwood City, CA 94063. The listed phone number is (650) 380-0616.
What is James Simmons's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is James Simmons enrolled in Medicare?
Yes. James Simmons 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 Simmons's services?
According to the CMS Revalidation Reassignment List (October 2026 release), James Simmons reassigns Medicare benefits to 10 organizations: Vituity Hospitalists PC (Redwood City, CA), Baz Allergy, Asthma & Sinus Center (Fremont, CA), Ucsf Health Medical Foundation (Oakland, CA), Altamont Emergency Physicians Medical Group Inc (Tracy, CA), Solano Gateway Medical Group Inc (Fairfield, CA) and 5 more organizations, listed in the Medicare section above. 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 Simmons'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 Simmons was last updated on January 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# James Willis Simmons II, NP · NPI 1366744492
Family physician in Redwood City, California. Individual provider, active in the CMS NPPES registry since November 22, 2010.
## Identity
- **NPI:** 1366744492 (Entity type: Individual)
- **Enumerated:** November 22, 2010
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** NP19879 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 830 JEFFERSON AVE, Redwood City, CA 94063-1804
- **Phone:** (650) 380-0616
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 10 organizations under Medicare reassignment (form CMS-855R): Vituity Hospitalists PC (NPI 1174000533, Redwood City, CA); Baz Allergy, Asthma & Sinus Center (NPI 1205208675, Fremont, CA); Ucsf Health Medical Foundation (NPI 1922124866, Oakland, CA); Altamont Emergency Physicians Medical Group Inc (NPI 1952392375, Tracy, CA); Solano Gateway Medical Group Inc (NPI 1952344293, Fairfield, CA); and 5 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2010
## Record status
- **NPPES last updated:** January 16, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1366744492) · Data from the CMS NPPES public registry.