DR. JOHN WARREN DE ROY D.C.
NPI 1881865418
Chiropractor in San Francisco, CA
About Dr. John Warren De Roy D.c. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN WARREN DE ROY D.C. (NPI 1881865418) is an individual chiropractor in San Francisco, California, licensed in California (15780) and active in the NPI registry since March 2008. He is a graduate of Los Angeles College Of Chiropractic (1983).
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. John Warren De Roy D.c. 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 Reassignment
Medicare enrollment records show John De Roy reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
San Francisco, CA 94102
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: John W Deroy Chiropractic Corporation
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
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.
Other Providers at the Same Location NPPES
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 John De Roy's NPI number?
The NPI number for John De Roy is 1881865418. It was assigned to this individual provider in the NPPES registry on March 24, 2008.
Where is John De Roy located?
John De Roy practices at 120 Hickory St Ste. B., San Francisco, CA 94102. The listed phone number is (415) 864-7860.
What is John De Roy's specialty?
The primary specialty registered for this NPI is Chiropractor with taxonomy code 111N00000X.
Is John De Roy enrolled in Medicare?
Yes. John De Roy 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 organization bills Medicare for John De Roy's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John De Roy reassigns Medicare benefits to John W. De Roy Chiropractic Corporation (San Francisco, CA). The 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 John De Roy'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 John De Roy was last updated on August 27, 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. John Warren De Roy, D.C. · NPI 1881865418
Chiropractor provider in San Francisco, California. Individual provider, active in the CMS NPPES registry since March 24, 2008.
## Identity
- **NPI:** 1881865418 (Entity type: Individual)
- **Enumerated:** March 24, 2008
- **Primary specialty:** Chiropractor · taxonomy 111N00000X
- **State license:** 15780 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 120 HICKORY ST, STE. B., San Francisco, CA 94102-5908
- **Phone:** (415) 864-7860 · **Fax:** (415) 864-6228
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** John W. De Roy Chiropractic Corporation (NPI 1053521898, San Francisco, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Los Angeles College Of Chiropractic, class of 1983
## Record status
- **NPPES last updated:** August 27, 2024
---
Source: [NPI Profile](https://npiprofile.com/npi/1881865418) · Data from the CMS NPPES public registry.