DR. DAVID TIMMER MD
NPI 1952987661
Hospitalist in San Diego, CA
About Dr. David Timmer Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. DAVID TIMMER MD (NPI 1952987661) is an individual hospitalist provider in San Diego, California, licensed in California (A191660) and active in the NPI registry since March 2021. He is enrolled in Medicare PECOS and maintains a secondary practice location in La Jolla.
NPPES Registry Identity
Specialties & Licenses 2
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 (PECOS)
Dr. David Timmer Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show David Timmer reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
San Diego, CA 92103
- Reassigned Medicare billing, California enrollment
- 1,051 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92103 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 10
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN DIEGO, CA 92103
SAN DIEGO, CA 92103
SAN DIEGO, CA 92103
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 Timmer's NPI number?
The NPI number for David Timmer is 1952987661. It was assigned to this individual provider in the NPPES registry on March 23, 2021.
Where is David Timmer located?
David Timmer practices at 200 W. Arbor Dr., San Diego, CA 92103. The listed phone number is (619) 543-6268.
What is David Timmer's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is David Timmer enrolled in Medicare?
Yes. David Timmer is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for David Timmer's services?
According to the CMS Revalidation Reassignment List (October 2026 release), David Timmer reassigns Medicare benefits to Regents Of The University Of California (San Diego, 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 David Timmer'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 Timmer was last updated on February 12, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 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.
# Dr. David Timmer, MD · NPI 1952987661
Hospitalist physician in San Diego, California. Individual provider, active in the CMS NPPES registry since March 23, 2021.
## Identity
- **NPI:** 1952987661 (Entity type: Individual)
- **Enumerated:** March 23, 2021
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** A191660 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 200 W. ARBOR DR., San Diego, CA 92103-8425
- **Phone:** (619) 543-6268
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health
- **Bills Medicare through:** Regents Of The University Of California (NPI 1487772380, San Diego, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** February 12, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1952987661) · Data from the CMS NPPES public registry.