DR. CLIFFORD CARL DOUGLAS MD, PH.D.
NPI 1932166485
Neurological Surgery in Riverside, CA
About Dr. Clifford Carl Douglas Md, Ph.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. CLIFFORD CARL DOUGLAS MD, PH.D. (NPI 1932166485) is an individual neurological surgery provider in Riverside, California, licensed in California (G70288) and active in the NPI registry since April 2006. He is enrolled in Medicare PECOS and is a graduate of Loma Linda University School Of Medicine (1989).
NPPES Registry Identity
Specialties & Licenses
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. Clifford Carl Douglas Md, Ph.d. 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
2Medicare enrollment records show Clifford Douglas reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Riverside, CA 92501
- Reassigned Medicare billing, California enrollment
- 2,584 clinicians in this Medicare group
Moorpark, CA 93021
- Reassigned Medicare billing, California enrollment
- 44 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 12
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 92501 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 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
RIVERSIDE, CA 92501
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 Clifford Douglas's NPI number?
The NPI number for Clifford Douglas is 1932166485. It was assigned to this individual provider in the NPPES registry on April 27, 2006.
Where is Clifford Douglas located?
Clifford Douglas practices at 4510 Brockton Ave Ste 175, Riverside, CA 92501. The listed phone number is (951) 786-5550.
What is Clifford Douglas's specialty?
The primary specialty registered for this NPI is Neurological Surgery with taxonomy code 207T00000X.
Is Clifford Douglas enrolled in Medicare?
Yes. Clifford Douglas 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 Clifford Douglas's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Clifford Douglas reassigns Medicare benefits to 2 organizations: Faculty Physicians And Surgeons Of Llusm (Riverside, CA) and Golden State Providers, A Medical Corporation (Moorpark, 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 Clifford Douglas'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 Clifford Douglas was last updated on April 4, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Dr. Clifford Carl Douglas, MD, PH.D. · NPI 1932166485
Neurological Surgery physician in Riverside, California. Individual provider, active in the CMS NPPES registry since April 27, 2006.
## Identity
- **NPI:** 1932166485 (Entity type: Individual)
- **Enumerated:** April 27, 2006
- **Primary specialty:** Neurological Surgery · taxonomy 207T00000X
- **State license:** G70288 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 4510 BROCKTON AVE STE 175, Riverside, CA 92501-4020
- **Phone:** (951) 786-5550
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Faculty Physicians And Surgeons Of Llusm (NPI 1518401546, Riverside, CA); Golden State Providers, A Medical Corporation (NPI 1366859449, Moorpark, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Loma Linda University School Of Medicine, class of 1989
## Record status
- **NPPES last updated:** April 4, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1932166485) · Data from the CMS NPPES public registry.