DR. MICHAEL WILLIAM TRIMMING MD
NPI 1992945513
Anesthesiology in Phoenix, AZ
About Dr. Michael William Trimming Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MICHAEL WILLIAM TRIMMING MD (NPI 1992945513) is an individual anesthesiology provider in Phoenix, Arizona, licensed in Arizona (43382) and active in the NPI registry since February 2009. He is enrolled in Medicare PECOS and is a graduate of New York Medical College (2005).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 5
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 William Trimming 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 Reassignments
2Medicare enrollment records show Michael Trimming reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Bernardino, CA 92404
- Reassigned Medicare billing, California enrollment
- 1,216 clinicians in this Medicare group
Santa Monica, CA 90404
- Reassigned Medicare billing, California enrollment
- 83 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 6
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.
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.
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 Trimming's NPI number?
The NPI number for Michael Trimming is 1992945513. It was assigned to this individual provider in the NPPES registry on February 22, 2009.
Where is Michael Trimming located?
Michael Trimming practices at 1850 N. Central Ave. Suite 1600, Phoenix, AZ 85004. The listed phone number is (602) 744-4760.
What is Michael Trimming's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Michael Trimming enrolled in Medicare?
Yes. Michael Trimming 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 Michael Trimming's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Michael Trimming reassigns Medicare benefits to 2 organizations: Inpatient Specialists Of California, PC (San Bernardino, CA) and Bayside Anesthesia Medical Group (Santa Monica, 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 Michael Trimming'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 Trimming was last updated on November 8, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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 William Trimming, MD · NPI 1992945513
Anesthesiology physician in Phoenix, Arizona. Individual provider, active in the CMS NPPES registry since February 22, 2009.
## Identity
- **NPI:** 1992945513 (Entity type: Individual)
- **Enumerated:** February 22, 2009
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 43382 (Arizona)
- **Sole proprietor:** No
## Practice location
- **Address:** 1850 N. CENTRAL AVE., SUITE 1600, Phoenix, AZ 85004-4633
- **Phone:** (602) 744-4760 · **Fax:** (602) 744-4799
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Inpatient Specialists Of California, PC (NPI 1952792475, San Bernardino, CA); Bayside Anesthesia Medical Group (NPI 1184668469, Santa Monica, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** New York Medical College, class of 2005
## Record status
- **NPPES last updated:** November 8, 2010
- **Other identifiers:** Medicare OSCAR/certification WA98458 (CA); Medicaid 554075 (AZ); Medicare UPIN WA98458 (CA); and 2 more
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Source: [NPI Profile](https://npiprofile.com/npi/1992945513) · Data from the CMS NPPES public registry.