Barbara Witowska, MS PAC
Medical Physician Assistant · Rancho Santa Margarita, CA
Barbara Witowska, MS PAC is a medical physician assistant with a practice address in Rancho Santa Margarita, California, and NPI 1013034230, issued on Mar 23, 2007. Check the license (California PA17153, 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.
- Name
- Barbara Witowska
- Credential
- MS PAC
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- License number
- PA17153 CA
Self-reported in NPPES; status is on the state search - Practice location
- 22032 EL Paseo Ste 130, Rancho Santa Margarita, CA 92688
- Phone
- (949) 589-9112
- Enumerated
- Mar 23, 2007
- Record last updated
- Sep 10, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (949) 589-9338
- Entity
- Type 1 · individual
8 nearest medical physician assistant records → All 3,376 in California → Look up another NPI →
Also registered at 22032 EL Paseo Ste 130
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Can Tamkoc, M.D.Emergency Medicine Physician1457565889
Verify Barbara Witowska in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA17153Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Barbara Witowska among 3,376 medical physician assistant records in California
Barbara Witowska, MS PAC is one of 3,376 medical physician assistant records with a practice address in California. 69% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2007, is newer than 20% of them.
- NPI issued2007 · 20% of these records are older, 68% newer
- In a Medicare fileNo · 69% of these records are
- In the CMS Doctors and Clinicians fileNo · 40% of these records are
- Record last updated2014 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AM0700X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Physician Assistant providers in California
There are 3,376 medical physician assistant records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 3,376 in California → Every provider in Rancho Santa Margarita → Medical Physician Assistant nationwide →
The 8 medical physician assistant records with the nearest ZIP codes
- Ryan Ah San, PA-CRancho Santa Margarita, CA 926881013181346
- Tri Tran, PA-CRancho Santa Margarita, CA 926881427447713
- Levi Williamson, PA-CRancho Santa Margarita, CA 926881932672615
- Jaehyun Cho, PAMission Viejo, CA 926911053952002
- Jessica Cummings, PA-CMission Viejo, CA 926911033480942
- Nafise Dolan, PA-CMission Viejo, CA 926911588260616
- Nicole Franklin, P.A.-CMission Viejo, CA 926911215023718
- Natasha Maylor, PA-CMission Viejo, CA 926911275497745
Common questions
What is Barbara Witowska, MS PAC's NPI number?
Barbara Witowska, MS PAC's National Provider Identifier (NPI) is 1013034230, issued on Mar 23, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Barbara Witowska, MS PAC located?
The NPPES record lists a practice address at 22032 EL Paseo Ste 130, Rancho Santa Margarita, CA, 92688. Phone: (949) 589-9112. Providers update this record themselves, so call before visiting.
How can I verify Barbara Witowska, MS PAC's license?
NPPES lists California license number PA17153, 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.
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.