DR. MICHAEL J DORSI MD
NPI 1942355854
Neurological Surgery in Thousand Oaks, CA
About Dr. Michael J Dorsi Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MICHAEL J DORSI MD (NPI 1942355854) is an individual neurological surgery provider in Thousand Oaks, California, licensed in California (A116011) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS, maintains 3 additional practice locations, and is a graduate of Johns Hopkins University School Of Medicine (2004).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 3
Other Identifiers 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
Dr. Michael J Dorsi 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 Michael Dorsi reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Los Angeles, CA 90095
- Reassigned Medicare billing, California enrollment
- 41 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 5
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 91360 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 15
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
THOUSAND OAKS, CA 91360
THOUSAND OAKS, CA 91360
THOUSAND OAKS, CA 91360
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 Michael Dorsi's NPI number?
The NPI number for Michael Dorsi is 1942355854. It was assigned to this individual provider in the NPPES registry on January 24, 2007.
Where is Michael Dorsi located?
Michael Dorsi practices at 100 Moody Ct Ste 200, Thousand Oaks, CA 91360. The listed phone number is (310) 319-3475.
What is Michael Dorsi's specialty?
The primary specialty registered for this NPI is Neurological Surgery with taxonomy code 207T00000X.
Is Michael Dorsi enrolled in Medicare?
Yes. Michael Dorsi 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 Michael Dorsi's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Michael Dorsi reassigns Medicare benefits to The Regents Of The University Of California (Los Angeles, 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 Michael Dorsi'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 Michael Dorsi was last updated on September 24, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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. Michael J Dorsi, MD · NPI 1942355854
Neurological Surgery physician in Thousand Oaks, California. Individual provider, active in the CMS NPPES registry since January 24, 2007.
## Identity
- **NPI:** 1942355854 (Entity type: Individual)
- **Enumerated:** January 24, 2007
- **Primary specialty:** Neurological Surgery · taxonomy 207T00000X
- **State license:** A116011 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 100 MOODY CT STE 200, Thousand Oaks, CA 91360-6082
- **Phone:** (310) 319-3475
## 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:** The Regents Of The University Of California (NPI 1538125844, Los Angeles, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Johns Hopkins University School Of Medicine, class of 2004
## Record status
- **NPPES last updated:** September 24, 2020
- **Other identifiers:** Medicaid FB434Z (CA)
---
Source: [NPI Profile](https://npiprofile.com/npi/1942355854) · Data from the CMS NPPES public registry.