Karen Maciejko, NP
Family Nurse Practitioner · San Rafael, CA
Karen Maciejko, NP is a family nurse practitioner with a practice address in San Rafael, California, and NPI 1407565427, issued on Nov 17, 2022. Check the license (California 95027143, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Karen Maciejko
- Credential
- NP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License numbers
- 95027143 CA
APN.0998178-NP CO
Self-reported in NPPES; status is on the state search - Practice location
- 411 3RD St, San Rafael, CA 94901
- Phone
- (415) 924-4525
- Enumerated
- Nov 17, 2022
- Record last updated
- Nov 12, 2024
- Medicare enrollment
- Enrolled (PECOS I20250102000832); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 16,966 in California → Look up another NPI →
Also registered at 411 3RD St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Francis Cubillo, LACAcupuncturist1730946450
Verify Karen Maciejko in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 95027143Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average family nurse practitioner in 2024
114 Medicare Part D claims for 57 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 25 claims were for opioids.
Most prescribed
- Ibuprofen32 claims
- Hydrocodone-Acetaminophen22 claims
- Promethazine Hcl14 claims
- Diclofenac Sodium12 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 2 group practices
- Brett V Curtis MD A Professional Corporation IncSan Rafael, CA
- Brett V Curtis MD And Associates A Professional CorporationNovato, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karen Maciejko among 16,966 family nurse practitioner records in California
Karen Maciejko, NP 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. Its NPI, issued in 2022, is newer than 68% of them.
- NPI issued2022 · 68% of these records are older, 25% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 40% of these records are
- Graduated2022 · median 2019 among the 6,793 with a school on file
- Record last updated2024 · 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).
32 family nurse practitioner records list a practice address in San Rafael
They are 32 of the 3,159 NPPES records with a practice address in San Rafael, and 16,966 family nurse practitioner records in California.
All 16,966 in California → Every provider in San Rafael → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Cynthia Adam, NPSan Rafael, CA 949011245606102
- Claudia Awamleh, FNPSan Rafael, CA 949011881168714
- Alec BradburySan Rafael, CA 949011902557226
- Marcia Byrnes, RN, FNPSan Rafael, CA 949011801035043
- Joanne Fisher, F.N.P.San Rafael, CA 949011467567453
- Joanna Gobea, FNPSan Rafael, CA 949011083389019
- Cara Gutterman, NPSan Rafael, CA 949011982853487
- Grace Hochstoeger, FNPSan Rafael, CA 949011396834354
Common questions
What is Karen Maciejko, NP's NPI number?
Karen Maciejko, NP's National Provider Identifier (NPI) is 1407565427, issued on Nov 17, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Karen Maciejko, NP located?
The NPPES record lists a practice address at 411 3RD St, San Rafael, CA, 94901. Phone: (415) 924-4525. Providers update this record themselves, so call before visiting.
How can I verify Karen Maciejko, NP's license?
NPPES lists California license number 95027143, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Karen Maciejko, NP prescribe under Medicare Part D?
In 2024, Karen Maciejko, NP had 114 Medicare Part D claims for 57 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.