Provider Profile
Karen Maciejko, NP
Unclaimed ProfileAbout Karen Maciejko
Karen Maciejko, NP is a nurse practitioner practicing in San Rafael, CA. Karen is also listed as specializing in nurse practitioner — family. According to Medicare claims data, the services billed most often include new patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more. This provider record is associated with NPI 1407565427.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (415) 924-4525
- Email not available
Practice Locations
411 3RD ST
San Rafael, CA 94901
100 Hospital Dr Ste 303
Vallejo, CA 94589
Procedures Most Often Billed to Medicare
18 services · 18 patients · 1 distinct code
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
18 | As often as other peers in Nurse Practitioner |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Related specialists at this location 2
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 2
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other nurse practitioners in San Rafael 8
Same specialty, same city.
More connections — 16 related providers in 2 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2022 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What kind of doctor is Karen Maciejko?
Karen Maciejko is a nurse practitioner in San Rafael, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
What is Karen Maciejko's address?
Karen Maciejko is listed at 411 3Rd St, San Rafael, CA 94901. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Karen Maciejko?
The number on file is (415) 924-4525. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Karen Maciejko?
Karen Maciejko's National Provider Identifier is 1407565427. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Karen Maciejko train?
Karen Maciejko attended Other, graduating in 2022. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Karen Maciejko have?
Karen Maciejko has 4 years experience. Calculated from a graduation year of 2022, reported in the CMS National Downloadable File.
CMS public data
What procedures does Karen Maciejko perform?
According to Medicare billing data, Karen Maciejko the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Karen Maciejko's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Karen Maciejko. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.