Cassandra Os, NP
- Medicare patients, 2024
- 76
- Part D claims, 2024
- 2,336
- Hospital affiliations
- 1
- Medical groups
- 2
- State license
- 1
- Practice address
- 93 Campus Ave, Lewiston, ME 04240
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
St Mary's Regional Medical Center - HOPD
Acute Care Hospital outpatient department · Lewiston, Maine
Find Cassandra Os' professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Cassandra Os is a nurse practitioner in Lewiston, Maine
Cassandra Os practices at St Mary's Regional Medical Center - HOPD in Lewiston, Maine.
Cassandra Os' NPI, 1285258863, was assigned on May 30, 2020. Cassandra Os holds Massachusetts license RN2309397.
- NPI
- 1285258863NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9133548522
- NPI enumeration date
- May 30, 2020
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 32
- Medical school graduation
- 2020
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Cassandra Os practices at St Mary's Regional Medical Center - HOPD in Lewiston, Maine
Cassandra Os' primary practice is St Mary's Regional Medical Center - HOPD, at 93 Campus Ave, Lewiston, ME 04240.
- St Mary's Regional Medical Center - HOPD93 Campus Ave, Lewiston, ME 04240
Source: Dmand AI Affiliation Data
Cassandra Os is affiliated with 4 sites of care and 2 medical groups
Cassandra Os' primary practice is St Mary's Regional Medical Center - HOPD in Lewiston, Maine. Cassandra Os is also affiliated with St. Mary's Regional Medical Center. The medical group on file is Select Physical Therapy. Dmand AI also links Cassandra Os to 1 more group practice or clinic, 1 hospital outpatient department and 1 medical group, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Cassandra Os' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Cassandra Os practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| St Mary's Regional Medical Center - HOPD | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Cassandra Os is one of 353 nurse practitioners in Maine
Nurse practitioner is Cassandra Os' primary specialty in the NPI Registry, under taxonomy code 363L00000X. Cassandra Os is licensed in Massachusetts.
Specialties and state licenses
- Nurse practitioner, MassachusettsPrimary
Nurse practitioners near Cassandra Os
Counts of nurse practitioners with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Cassandra Os treated 76 Medicare patients in 2024, average age 78
CMS counts 76 Medicare patients who saw Cassandra Os in 2024. The largest group is 85 and over, with 23 patients. 75% of them have high blood pressure, and 67% have high cholesterol. 74% are also on Medicaid. Their average risk score is 2.25, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Cassandra Os' median patient age at 49, with 70% women.
Cassandra Os' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Cassandra Os' Medicare patients by sex, 2024
- Women4357%
- Men3343%
Chronic conditions among Cassandra Os' Medicare patients, 2024
- High blood pressure75%
- High cholesterol67%
- Alzheimer's and dementia62%
- Mood disorders59%
- Arthritis55%
- Anxiety47%
- Diabetes47%
- Depression42%
Share of Medicare patients with each condition. A patient can have several.
Cassandra Os' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 49
Patient panel by sex, all payers
- Women70%
- Men29%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Cassandra Os wrote 2,336 Medicare Part D claims in 2024
In 2024, Cassandra Os wrote 2,336 Medicare Part D claims for 109 patients. 87% of them were for generic drugs.
Cassandra Os' Part D claims by kind of drug, 2024
- Generic2,043 claims87%
- Brand-name and other293 claims13%
Drug classes CMS tracks in Cassandra Os' Part D claims, 2024
- Opioids2%39 of 2,336 claims
- Antibiotics2%55 of 2,336 claims
- Antipsychotics, patients 65 and over3%73 of 2,336 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Cassandra Os takes part in Medicare
Cassandra Os accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Sources for Cassandra Os's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Cassandra Os
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What is Cassandra Os' NPI number?
Cassandra Os' NPI number is 1285258863. It was assigned on May 30, 2020, and it is active in the NPI Registry.
What does Cassandra Os specialize in?
Cassandra Os is a nurse practitioner in Lewiston, Maine. The primary specialty in the NPI Registry is Nurse Practitioner (taxonomy code 363L00000X).
Where does Cassandra Os practice?
Cassandra Os practices at 93 Campus Ave, Lewiston, ME 04240. Cassandra Os' primary practice is St Mary's Regional Medical Center - HOPD in Lewiston, Maine. Dmand AI also links Cassandra Os to 1 group practice or clinic, 1 hospital outpatient department and 1 medical group.
What is Cassandra Os' medical license number?
Cassandra Os holds Massachusetts license RN2309397.
Which hospitals is Cassandra Os affiliated with?
Cassandra Os is affiliated with St. Mary's Regional Medical Center.
What medical group is Cassandra Os part of?
Cassandra Os is linked to Select Physical Therapy. Dmand AI links Cassandra Os to 1 more medical group.
Does Cassandra Os accept Medicare?
Yes. CMS lists Cassandra Os as accepting Medicare assignment.
How many Medicare patients does Cassandra Os see?
CMS counts 76 Medicare patients who saw Cassandra Os in 2024, with an average age of 78.
How long has Cassandra Os been practicing?
Cassandra Os graduated from medical school in 2020, 6 years ago.
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