Katherine Helen Mader, PA-C
Physician Assistant · Walnut Creek, CA
Katherine Helen Mader, PA-C is a physician assistant with a practice address in Walnut Creek, California, and NPI 1730416066, issued on Nov 6, 2009. Check the license (California 58992, 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
- Katherine Helen Mader
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License numbers
- 58992 CA
7494142-1206 UT
Self-reported in NPPES; status is on the state search - Practice location
- 100 Pringle Ave Ste 425, Walnut Creek, CA 94596
- Phone
- (925) 932-3800
- Enumerated
- Nov 6, 2009
- Record last updated
- Jul 20, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (925) 933-3339
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 100 Pringle Ave Ste 425
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Stefanie Altmann, DOInternal Medicine Physician1912494188
Verify Katherine Helen Mader in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 58992Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Katherine Helen Mader among 14,451 physician assistant records in California
Katherine Helen Mader, 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 not. Its NPI, issued in 2009, is newer than 25% of them.
- NPI issued2009 · 25% of these records are older, 73% newer
- In a Medicare fileNo · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2021 · 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).
89 physician assistant records list a practice address in Walnut Creek
They are 89 of the 6,170 NPPES records with a practice address in Walnut Creek, and 14,451 physician assistant records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 14,451 in California → Every provider in Walnut Creek → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Viktor Buzin, MPA, PA-CWalnut Creek, CA 945961790023620
- Linda Cortez, PA-CWalnut Creek, CA 945961487927414
- James Derum, PA-CWalnut Creek, CA 945961447355474
- Zacharia Greenlee, PA-CWalnut Creek, CA 945961427469097
- Karen Hauser, PAWalnut Creek, CA 945961609085760
- Richard King, PA-CWalnut Creek, CA 945961093870016
- Kevin King, PA-CWalnut Creek, CA 945961841509171
- Cyril Kulka, PA-CWalnut Creek, CA 945961225166556
Common questions
What is Katherine Helen Mader, PA-C's NPI number?
Katherine Helen Mader, PA-C's National Provider Identifier (NPI) is 1730416066, issued on Nov 6, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Helen Mader, PA-C located?
The NPPES record lists a practice address at 100 Pringle Ave Ste 425, Walnut Creek, CA, 94596. Phone: (925) 932-3800. Providers update this record themselves, so call before visiting.
How can I verify Katherine Helen Mader, PA-C's license?
NPPES lists California license number 58992, 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.