DR. WILLIAM H SLATTERY III MD
NPI 1184728750
Otolaryngology in Los Angeles, CA
About Dr. William H Slattery Iii Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. WILLIAM H SLATTERY III MD (NPI 1184728750) is an individual otolaryngology provider in Los Angeles, California, licensed in California (G075566) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS and is a graduate of University Of Missouri, Columbia School Of Medicine (1988).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 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
Dr. William H Slattery Iii 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
3Medicare enrollment records show William Slattery reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Los Angeles, CA 90057
- Reassigned Medicare billing, California enrollment
- 840 clinicians in this Medicare group
Los Angeles, CA 90017
- Reassigned Medicare billing, California enrollment
- 12 clinicians in this Medicare group
Honolulu, HI 96819
- Reassigned Medicare billing, Hawaii enrollment
- 1,187 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 9
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 90057 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LOS ANGELES, CA 90057
LOS ANGELES, CA 90057
LOS ANGELES, CA 90057
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 William Slattery's NPI number?
The NPI number for William Slattery is 1184728750. It was assigned to this individual provider in the NPPES registry on September 12, 2006.
Where is William Slattery located?
William Slattery practices at 2100 W 3rd St Suite 111, Los Angeles, CA 90057. The listed phone number is (213) 483-9930.
What is William Slattery's specialty?
The primary specialty registered for this NPI is Otolaryngology with taxonomy code 207Y00000X.
Is William Slattery enrolled in Medicare?
Yes. William Slattery 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 William Slattery's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Slattery reassigns Medicare benefits to 3 organizations: Pih Health Physicians (Los Angeles, CA), House Ear Clinic Inc (Los Angeles, CA) and Hawaii Permanente Medical Group Inc (Honolulu, HI). 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 William Slattery'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 William Slattery was last updated on January 6, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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. William H Slattery III, MD · NPI 1184728750
Otolaryngology physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since September 12, 2006.
## Identity
- **NPI:** 1184728750 (Entity type: Individual)
- **Enumerated:** September 12, 2006
- **Primary specialty:** Otolaryngology · taxonomy 207Y00000X
- **State license:** G075566 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 2100 W 3RD ST, SUITE 111, Los Angeles, CA 90057-1944
- **Phone:** (213) 483-9930 · **Fax:** (213) 483-0905
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Pih Health Physicians (NPI 1881342087, Los Angeles, CA); House Ear Clinic Inc (NPI 1881624799, Los Angeles, CA); Hawaii Permanente Medical Group Inc (NPI 1710945969, Honolulu, HI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Missouri, Columbia School Of Medicine, class of 1988
## Record status
- **NPPES last updated:** January 6, 2017
- **Other identifiers:** Medicare PIN G75566 (CA); Medicare PIN WG75566A (CA); Medicare UPIN F75241
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Source: [NPI Profile](https://npiprofile.com/npi/1184728750) · Data from the CMS NPPES public registry.