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

Marlena Osowski

Individual provider Registered Nurse · NPI 1386335776

Marlena Osowski is a Nurse Practitioner in Boston, Massachusetts. Qualified in 2023, 3 years ago. Practices with Gbgastro LLC, a 22-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
3
Licensed in
MA
In the registry since
2023
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Practice location Address checks out

850 Washington St
Boston, MA 02111-1521
Phone: (617) 636-5000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Registered Nurse (primary) Taxonomy 163W00000X · Licence RN2354068 (MA)

Record details

NPI number1386335776
Entity typeIndividual (Type 1)
GenderFemale
Sole proprietorNo
NPI enumeratedMay 16, 2023
Last updated in NPPESMay 16, 2023
Certification dateMay 11, 2023
Mailing address22 Manor Ln, Oxford, MA 01540-1502

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2023 (3 years in practice)
Group practice Gbgastro Llc — 22 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Other providers in Boston