Susan Mary Karplus, N.P.
Family Nurse Practitioner · Castro Valley, CA
Susan Mary Karplus, N.P. is a family nurse practitioner with a practice address in Castro Valley, California, and NPI 1184878654, issued on Nov 11, 2008. Check the license (California NP 18840, 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
- Susan Mary Karplus
- Credential
- N.P.
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License numbers
- NP 18840 CA
385018 CA
Self-reported in NPPES; status is on the state search - Practice location
- 20400 Lake Chabot RD, Castro Valley, CA 94546
- Phone
- (510) 247-9227
- Enumerated
- Nov 11, 2008
- Record last updated
- Apr 4, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (510) 247-9241
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 16,966 in California → Look up another NPI →
Also registered at 20400 Lake Chabot RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Kenneth Lien, MDAllergy Physician1396823092
Verify Susan Mary Karplus in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license NP 18840Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Susan Mary Karplus among 16,966 family nurse practitioner records in California
Susan Mary Karplus, N.P. is one of 16,966 family nurse practitioner records with a practice address in California. 67% 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 2008, is newer than 13% of them.
- NPI issued2008 · 13% of these records are older, 85% newer
- In a Medicare fileNo · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 40% of these records are
- Record last updated2016 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
12 family nurse practitioner records list a practice address in Castro Valley
They are 12 of the 999 NPPES records with a practice address in Castro Valley, and 16,966 family nurse practitioner records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 16,966 in California → Every provider in Castro Valley → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Tamara Brar, FNPCastro Valley, CA 945461932608494
- Abigail Clinkscales, APRN, FNP-CCastro Valley, CA 945461528578846
- Fern Cudlip, FNP, MSNCastro Valley, CA 945461922240183
- Ristina IngramCastro Valley, CA 945461720544596
- Olivia Rusu, FNPCastro Valley, CA 945461043469695
- Parminder SidhuCastro Valley, CA 945461225786049
- Manwinder Sidhu, FNPCastro Valley, CA 945461821984725
- Christina Vega, FNPCastro Valley, CA 945461093148868
Common questions
What is Susan Mary Karplus, N.P.'s NPI number?
Susan Mary Karplus, N.P.'s National Provider Identifier (NPI) is 1184878654, issued on Nov 11, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Susan Mary Karplus, N.P. located?
The NPPES record lists a practice address at 20400 Lake Chabot RD, Castro Valley, CA, 94546. Phone: (510) 247-9227. Providers update this record themselves, so call before visiting.
How can I verify Susan Mary Karplus, N.P.'s license?
NPPES lists California license number NP 18840, 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.