NPPES file of Aug 9, 2026

Stephen Schirmacher, RN

Registered Nurse First Assistant · Irvine, CA

Stephen Schirmacher, RN is a registered nurse first assistant with a practice address in Irvine, California, and NPI 1578312898, issued on May 17, 2024. Check the license (California 739164, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1578312898
Name
Stephen Schirmacher
Credential
RN
Primary taxonomy
Registered Nurse First Assistant 163WR0006X
License number
739164 CA
Self-reported in NPPES; status is on the state search
Practice location
16200 Sand Canyon Ave, Irvine, CA 92618
Phone
(949) 727-5016
Enumerated
May 17, 2024
Record last updated
May 17, 2024
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 16200 Sand Canyon Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Christine AyalaNurse Practitioner1831879154
  2. Nicholas Bove, MDEmergency Medicine Physician1255837837
  3. David Calica, M.D.Anesthesiology Physician1780787606
  4. Danielle CarlsonRegistered Nurse1710850409
  5. John Chien, M.D.Hospitalist Physician1790043651
  6. Michael Cho, M.D.Hospitalist Physician1184915001

Verify Stephen Schirmacher in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license 739164    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Registered Nurse First Assistant providers in California

There are 303 registered nurse first assistant records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 303 in California → Every provider in Irvine →

Other registered nurse first assistant records in California

  1. Darin Abacherli, RNFAMammoth Lakes, CA1114721008
  2. Antoinette Aguayo, RNFAElverta, CA1396449450
  3. Ignacio Aguilar, RNFAPasadena, CA1497583603
  4. Bahjat Akari, RNFAMurrieta, CA1588853683
  5. Betsy Albrecht, R.N. CNOR RNFARiverside, CA1043643208
  6. Woodryan Alexander, CRNFAValencia, CA1750501375
  7. Rachel Ann Alikes, RNModesto, CA1073441374
  8. Glenn Almazan, RNFACerritos, CA1598640443
  9. Rebecca Althoff, RNFASanta Rosa, CA1427119668
  10. Jessica Alva, R.N.F.A.Laguna Hills, CA1265848733

Common questions

What is Stephen Schirmacher, RN's NPI number?

Stephen Schirmacher, RN's National Provider Identifier (NPI) is 1578312898, issued on May 17, 2024. An NPI identifies a provider in billing; it is not a license.

Where is Stephen Schirmacher, RN located?

The NPPES record lists a practice address at 16200 Sand Canyon Ave, Irvine, CA, 92618. Phone: (949) 727-5016. Providers update this record themselves, so call before visiting.

How can I verify Stephen Schirmacher, RN's license?

NPPES lists California license number 739164, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.