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

Cassandra Os, NP

Individual provider Nurse Practitioner · NPI 1285258863

Cassandra Os, NP is a Nurse Practitioner in Berlin, New Hampshire. Qualified in 2020, 6 years ago. Practices with Community Clinical Services Inc, a 17-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
6
Licensed in
MA
In the registry since
2020
What do these letters mean?
NP — Nurse Practitioner
An advanced practice nurse who can diagnose, treat and in most states prescribe.

See every abbreviation used in this directory →

Practice location Address checks out

133 Pleasant St
Berlin, NH 03570-2006
Phone: (603) 752-2040
Show map & directions

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

Additional practice locations (1)

  • 103 Myron St Ste A, West Springfield, MA 01089-1485 — (888) 964-6681

Specialties & licences

Nurse Practitioner (primary) Taxonomy 363L00000X · Licence RN2309397 (MA)

Record details

NPI number1285258863
Entity typeIndividual (Type 1)
GenderFemale
Credentials NP
Sole proprietorNo
NPI enumeratedMay 30, 2020
Last updated in NPPESJune 9, 2026
Certification dateJune 9, 2026
Mailing address100 Crossing Blvd Ste 300, Framingham, MA 01702-5555

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2020 (6 years in practice)
Group practice Community Clinical Services Inc — 17 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare