Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Mrs. Roswitha Siebu-Baker, NP, RN

Individual provider Nurse Practitioner · NPI 1063154813

Mrs. Roswitha Siebu-Baker, NP, RN is a Nurse Practitioner in Bethesda, Maryland. Practices as a sole proprietor. Licensed in Maryland.

Licensed in
MD
In the registry since
2022
Specialties on file
2
What do these letters mean?
NP — Nurse Practitioner
An advanced practice nurse who can diagnose, treat and in most states prescribe.
RN — Registered Nurse
A licensed nurse who completed a nursing degree and passed the NCLEX-RN examination.

See every abbreviation used in this directory →

Practice location Address checks out

8901 Rockville Pike
Bethesda, MD 20889-0001
Phone: (307) 319-4600
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Registered Nurse (primary) Taxonomy 163W00000X · Licence R215369 (MD)
Nurse Practitioner Taxonomy 363L00000X · Licence 2021085909 (MD)

Record details

NPI number1063154813
Entity typeIndividual (Type 1)
GenderFemale
Credentials NP , RN
Sole proprietorYes
NPI enumeratedApril 12, 2022
Last updated in NPPESApril 12, 2022
Certification dateApril 12, 2022

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