Stephanie Mignon Sisneros, PA-C
Physician Assistant · Mission Viejo, CA
Stephanie Mignon Sisneros, PA-C is a physician assistant with a practice address in Mission Viejo, California, and NPI 1356397970, issued on May 25, 2006. Check the license (California PA17178, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Stephanie Mignon Sisneros
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA17178 CA
Self-reported in NPPES; status is on the state search - Practice location
- 26302 LA Paz RD, Mission Viejo, CA 92691
- Phone
- (949) 768-3643
- Enumerated
- May 25, 2006
- Record last updated
- Jul 13, 2026
- Medicare enrollment
- Enrolled (PECOS I20230227001070); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 26302 LA Paz RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Andrew Choi, DDSGeneral Practice Dentistry1083650493
Verify Stephanie Mignon Sisneros in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA17178Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% fewer Medicare Part D claims than the average physician assistant in 2024
149 Medicare Part D claims for 14 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Trazodone Hcl15 claims
- Fluoxetine Hcl13 claims
- Gabapentin13 claims
- Sertraline Hcl13 claims
- Aripiprazole11 claims
- Lorazepam11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Telemedicine Group PCRoseville, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stephanie Mignon Sisneros among 14,451 physician assistant records in California
Stephanie Mignon Sisneros, PA-C is one of 14,451 physician assistant records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 1% of them.
- NPI issued2006 · 1% of these records are older, 87% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2003 · median 2018 among the 7,214 with a school on file
- Record last updated2026 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
50 physician assistant records list a practice address in Mission Viejo
They are 50 of the 2,156 NPPES records with a practice address in Mission Viejo, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Mission Viejo → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Kira Babb, PA-CMission Viejo, CA 926911730318767
- Stephanie Blodgett, PA-CMission Viejo, CA 926911720287170
- Tria Brummond, PA-CMission Viejo, CA 926911952461659
- Cassandra Karn, P.A.Mission Viejo, CA 926911245247774
- Linda Kiehlmeir, P.A-CMission Viejo, CA 926911902834575
- Lara Manchik, P.A.C.Mission Viejo, CA 926911639108327
- John Mellott, P.A.Mission Viejo, CA 926911023041902
- Lorelei Opene, PA-CMission Viejo, CA 926911659350445
Common questions
What is Stephanie Mignon Sisneros, PA-C's NPI number?
Stephanie Mignon Sisneros, PA-C's National Provider Identifier (NPI) is 1356397970, issued on May 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Stephanie Mignon Sisneros, PA-C located?
The NPPES record lists a practice address at 26302 LA Paz RD, Mission Viejo, CA, 92691. Phone: (949) 768-3643. Providers update this record themselves, so call before visiting.
How can I verify Stephanie Mignon Sisneros, PA-C's license?
NPPES lists California license number PA17178, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Stephanie Mignon Sisneros, PA-C prescribe under Medicare Part D?
In 2024, Stephanie Mignon Sisneros, PA-C had 149 Medicare Part D claims for 14 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions 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. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
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.