JULIO E WILLIAMS MD
NPI 1588761001
Thoracic Surgery (Cardiothoracic Vascular Surgery) in San Bernardino, CA
About Julio E Williams Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JULIO E WILLIAMS MD (NPI 1588761001) is an individual thoracic surgery (cardiothoracic vascular surgery) provider in San Bernardino, California, licensed in Kansas (0453717) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, is affiliated with Spartanburg Medical Center, and maintains a secondary practice location in Hays.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Accepted Insurance
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
Julio E Williams 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.
Medicare Billing Reassignments
7Medicare enrollment records show Julio Williams reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Bernardino, CA 92404
- Reassigned Medicare billing, California enrollment
- 1,191 clinicians in this Medicare group
Redding, CA 96001
- Reassigned Medicare billing, California enrollment
- 63 clinicians in this Medicare group
Big Spring, TX 79720
- Reassigned Medicare billing, Texas enrollment
- 318 clinicians in this Medicare group
Abilene, TX 79601
- Reassigned Medicare billing, Texas enrollment
- 420 clinicians in this Medicare group
Travelers Rest, SC 29690
- Reassigned Medicare billing, South Carolina enrollment
- 754 clinicians in this Medicare group
Johnson City, NY 13790
- Reassigned Medicare billing, New York enrollment
- 854 clinicians in this Medicare group
Binghamton, NY 13905
- Reassigned Medicare billing, New York enrollment
- 528 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 5
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.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Spartanburg Medical Center
Acute Care Hospitals · Spartanburg, SCSentara Rmh Medical Center
Acute Care Hospitals · Harrisonburg, VAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92404 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 11
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN BERNARDINO, CA 92404
SAN BERNARDINO, CA 92404
SAN BERNARDINO, CA 92404
SAN BERNARDINO, CA 92404
SAN BERNARDINO, CA 92404
SAN BERNARDINO, CA 92404
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 Julio Williams's NPI number?
The NPI number for Julio Williams is 1588761001. It was assigned to this individual provider in the NPPES registry on September 19, 2006.
Where is Julio Williams located?
Julio Williams practices at 401 E Highland Ave Ste 251, San Bernardino, CA 92404. The listed phone number is (909) 882-4605.
What is Julio Williams's specialty?
The primary specialty registered for this NPI is Thoracic Surgery (Cardiothoracic Vascular Surgery) with taxonomy code 208G00000X.
Is Julio Williams enrolled in Medicare?
Yes. Julio Williams 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 Julio Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Julio Williams reassigns Medicare benefits to 7 organizations: Dignity Health Medical Foundation (San Bernardino, CA), Shasta Regional Medical Group Inc (Redding, CA), Regional Employee Assistance Program Inc (Big Spring, TX), Hendrick Provider Network (Abilene, TX), Spartanburg Medical Center (Travelers Rest, SC) and 2 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 Julio Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Julio Williams accept?
Health plans from Blue Cross Blue Shield of North Dakota, BlueCross BlueShield of South Carolina, InStil Health and UnitedHealthcare list Julio Williams as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Julio Williams affiliated with any hospitals?
According to CMS data, Julio Williams is affiliated with Spartanburg Medical Center and Sentara Rmh Medical Center.
When was this NPI record last updated?
The NPPES record for Julio Williams was last updated on September 8, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 45 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.
# Julio E Williams, MD · NPI 1588761001
Thoracic Surgery (Cardiothoracic Vascular Surgery) physician in San Bernardino, California. Individual provider, active in the CMS NPPES registry since September 19, 2006.
## Identity
- **NPI:** 1588761001 (Entity type: Individual)
- **Enumerated:** September 19, 2006
- **Primary specialty:** Thoracic Surgery (Cardiothoracic Vascular Surgery) · taxonomy 208G00000X
- **State license:** 0453717 (Kansas)
- **Sole proprietor:** No
## Practice location
- **Address:** 401 E HIGHLAND AVE STE 251, San Bernardino, CA 92404-3800
- **Phone:** (909) 882-4605 · **Fax:** (909) 475-2680
## 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:** 7 organizations under Medicare reassignment (form CMS-855R): Dignity Health Medical Foundation (NPI 1053653873, San Bernardino, CA); Shasta Regional Medical Group Inc (NPI 1396990545, Redding, CA); Regional Employee Assistance Program Inc (NPI 1669801585, Big Spring, TX); Hendrick Provider Network (NPI 1396961322, Abilene, TX); Spartanburg Medical Center (NPI 1477938777, Travelers Rest, SC); and 2 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1995
## Record status
- **NPPES last updated:** September 8, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1588761001) · Data from the CMS NPPES public registry.