IAN TILER MOSIER
NPI 1356045181
Psychologist - Clinical in Oakland, CA
About Ian Tiler Mosier NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
IAN TILER MOSIER (NPI 1356045181) is an individual clinical provider in Oakland, California, licensed in California (35202) and active in the NPI registry since March 2023. He is enrolled in Medicare PECOS, maintains a secondary practice location in Millbrae, and is a graduate of Southern Illinois University School Of Medicine (2020).
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 and accepts Medicare assignment
Ian Tiler Mosier 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 Ian Mosier reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Oakland, CA 94601
- Reassigned Medicare billing, California enrollment
- 71 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 94601 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.
OAKLAND, CA 94601
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 Ian Mosier's NPI number?
The NPI number for Ian Mosier is 1356045181. It was assigned to this individual provider in the NPPES registry on March 27, 2023.
Where is Ian Mosier located?
Ian Mosier practices at 3124 International Blvd, Oakland, CA 94601. The listed phone number is (510) 535-4400.
What is Ian Mosier's specialty?
The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.
Is Ian Mosier enrolled in Medicare?
Yes. Ian Mosier 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 Ian Mosier's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ian Mosier reassigns Medicare benefits to Native American Health Center, Inc (Oakland, 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 Ian Mosier'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 Ian Mosier was last updated on November 27, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Ian Tiler Mosier · NPI 1356045181
Clinical provider in Oakland, California. Individual provider, active in the CMS NPPES registry since March 27, 2023.
## Identity
- **NPI:** 1356045181 (Entity type: Individual)
- **Enumerated:** March 27, 2023
- **Primary specialty:** Psychologist - Clinical · taxonomy 103TC0700X
- **State license:** 35202 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 3124 INTERNATIONAL BLVD, Oakland, CA 94601-2902
- **Phone:** (510) 535-4400
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** Native American Health Center, Inc (NPI 1619147030, Oakland, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Southern Illinois University School Of Medicine, class of 2020
## Record status
- **NPPES last updated:** November 27, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1356045181) · Data from the CMS NPPES public registry.