ADAM NICOLAS SCHAAR MD
NPI 1902555113
Anesthesiology in San Diego, CA
About Adam Nicolas Schaar Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ADAM NICOLAS SCHAAR MD (NPI 1902555113) is an individual anesthesiology provider in San Diego, California, licensed in California (187363) and active in the NPI registry since March 2022. He is enrolled in Medicare PECOS, maintains 3 additional practice locations, and is a graduate of University Of California, San Diego School Of Medicine (2022).
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 3
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
Adam Nicolas Schaar 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 Reassignment
Medicare enrollment records show Adam Schaar 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
- 251 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.
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.
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 Adam Schaar's NPI number?
The NPI number for Adam Schaar is 1902555113. It was assigned to this individual provider in the NPPES registry on March 23, 2022.
Where is Adam Schaar located?
Adam Schaar practices at 200 W Arbor Dr, San Diego, CA 92103. The listed phone number is (800) 926-8273.
What is Adam Schaar's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Adam Schaar enrolled in Medicare?
Yes. Adam Schaar 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 Adam Schaar's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Adam Schaar 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 Adam Schaar'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 Adam Schaar was last updated on June 11, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Adam Nicolas Schaar, MD · NPI 1902555113
Anesthesiology physician in San Diego, California. Individual provider, active in the CMS NPPES registry since March 23, 2022.
## Identity
- **NPI:** 1902555113 (Entity type: Individual)
- **Enumerated:** March 23, 2022
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 187363 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 200 W ARBOR DR, San Diego, CA 92103-9000
- **Phone:** (800) 926-8273 · **Fax:** (888) 539-8781
## 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:** Regents Of The University Of California (NPI 1356444897, San Diego, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, San Diego School Of Medicine, class of 2022
## Record status
- **NPPES last updated:** June 11, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1902555113) · Data from the CMS NPPES public registry.