DR. DAVID JAMES GUIST DILLON MD, PHD
NPI 1043741028
Emergency Medicine in Sacramento, CA
About Dr. David James Guist Dillon Md, Phd NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. DAVID JAMES GUIST DILLON MD, PHD (NPI 1043741028) is an individual emergency medicine provider in Sacramento, California, licensed in California (A159976) and active in the NPI registry since March 2017. He is enrolled in Medicare PECOS and is a graduate of Other (2017).
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. David James Guist Dillon Md, Phd 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
5Medicare enrollment records show David Dillon reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Sacramento, CA 95817
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Regents Of The Univ Of Ca
- 2,570 clinicians in this Medicare group
San Francisco, CA 94109
- Reassigned Medicare billing, California enrollment
- 155 clinicians in this Medicare group
San Francisco, CA 94110
- Reassigned Medicare billing, California enrollment
- 842 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 5,645 clinicians in this Medicare group
San Francisco, CA 94122
- Reassigned Medicare billing, California enrollment
- 5,544 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 4
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 95817 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SACRAMENTO, CA 95817
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 David Dillon's NPI number?
The NPI number for David Dillon is 1043741028. It was assigned to this individual provider in the NPPES registry on March 22, 2017.
Where is David Dillon located?
David Dillon practices at 2315 Stockton Blvd, Sacramento, CA 95817. The listed phone number is (916) 734-8568.
What is David Dillon's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is David Dillon enrolled in Medicare?
Yes. David Dillon 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 David Dillon's services?
According to the CMS Revalidation Reassignment List (October 2026 release), David Dillon reassigns Medicare benefits to 5 organizations: Regents Of The University Of Ca (Sacramento, CA), San Francisco Emergency Medical Associates (San Francisco, CA), University Of California Sfgh Medical Group (San Francisco, CA), University Of California San Francisco (San Francisco, CA) and Ucsf Medical Group Business Services (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 David Dillon'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 David Dillon was last updated on December 1, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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. David James Guist Dillon, MD, PHD · NPI 1043741028
Emergency Medicine physician in Sacramento, California. Individual provider, active in the CMS NPPES registry since March 22, 2017.
## Identity
- **NPI:** 1043741028 (Entity type: Individual)
- **Enumerated:** March 22, 2017
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** A159976 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 2315 STOCKTON BLVD, Sacramento, CA 95817-2201
- **Phone:** (916) 734-8568
## 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:** 5 organizations under Medicare reassignment (form CMS-855R): Regents Of The University Of Ca (NPI 1063405074, Sacramento, CA); San Francisco Emergency Medical Associates (NPI 1134110661, San Francisco, CA); University Of California Sfgh Medical Group (NPI 1174598296, San Francisco, CA); University Of California San Francisco (NPI 1346329380, San Francisco, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2017
## Record status
- **NPPES last updated:** December 1, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1043741028) · Data from the CMS NPPES public registry.