STEVEN P YAMAGUCHI MD
NPI 1912958349
Emergency Medicine in Fairfield, OH
About Steven P Yamaguchi Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
STEVEN P YAMAGUCHI MD (NPI 1912958349) is an individual emergency medicine provider in Fairfield, Ohio, licensed in Ohio (35071257Y) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
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 (PECOS)
Steven P Yamaguchi Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Steven Yamaguchi reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Seaman, OH 45679
- Reassigned Medicare billing, Ohio enrollment
- 894 clinicians in this Medicare group
Toledo, OH 43608
- Reassigned Medicare billing, Ohio enrollment
- 277 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 3
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 45014 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.
FAIRFIELD, OH 45014
FAIRFIELD, OH 45014
FARFIELD, OH 45014
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 Steven Yamaguchi's NPI number?
The NPI number for Steven Yamaguchi is 1912958349. It was assigned to this individual provider in the NPPES registry on May 12, 2006.
Where is Steven Yamaguchi located?
Steven Yamaguchi practices at 3000 Mack Rd, Fairfield, OH 45014. The listed phone number is (513) 870-7001.
What is Steven Yamaguchi's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Steven Yamaguchi enrolled in Medicare?
Yes. Steven Yamaguchi is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Steven Yamaguchi's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Steven Yamaguchi reassigns Medicare benefits to 2 organizations: Emergency Professional Services, Inc. (Seaman, OH) and Mercy Emergency Care Services, Inc. (Toledo, OH). 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 Steven Yamaguchi'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 Steven Yamaguchi was last updated on May 15, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# Steven P Yamaguchi, MD · NPI 1912958349
Emergency Medicine physician in Fairfield, Ohio. Individual provider, active in the CMS NPPES registry since May 12, 2006.
## Identity
- **NPI:** 1912958349 (Entity type: Individual)
- **Enumerated:** May 12, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 35071257Y (Ohio)
- **Sole proprietor:** No
## Practice location
- **Address:** 3000 MACK RD, Fairfield, OH 45014-5335
- **Phone:** (513) 870-7001 · **Fax:** (513) 603-8174
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **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): Emergency Professional Services, Inc. (NPI 1093762353, Seaman, OH); Mercy Emergency Care Services, Inc. (NPI 1477957819, Toledo, OH) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** May 15, 2008
- **Other identifiers:** Other 000000316084 (OH); Medicaid 2026953 (OH); Medicare ID-Type Unspecified YA0845966; and 2 more
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Source: [NPI Profile](https://npiprofile.com/npi/1912958349) · Data from the CMS NPPES public registry.