Marlena Osowski
Registered Nurse · Boston, MA
Marlena Osowski is a registered nurse with a practice address in Boston, Massachusetts, and NPI 1386335776, issued on May 16, 2023. Check the license (Massachusetts RN2354068, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Marlena Osowski
- Primary taxonomy
- Registered Nurse 163W00000X
- License number
- RN2354068 MA
Self-reported in NPPES; status is on the state search - Practice location
- 850 Washington St, Boston, MA 02111
- Phone
- (617) 636-5000
- Enumerated
- May 16, 2023
- Record last updated
- May 16, 2023
- Medicare enrollment
- Enrolled (PECOS I20231215000656); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest registered nurse records → All 4,985 in Massachusetts → Look up another NPI →
Verify Marlena Osowski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license RN2354068Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% fewer Medicare Part D claims than the average registered nurse in 2024
97 Medicare Part D claims for 57 beneficiaries, against an average of 678 among the 694 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Pantoprazole Sodium22 claims
- Omeprazole21 claims
- Famotidine15 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $392.99
15 payments; by number, the most common kind was food and beverage; the largest payer was Takeda Pharmaceuticals U.S.A., Inc. The 1,191 providers of this specialty with any payment received $505.98 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Gbgastro LLCFramingham, MA
- Greater Boston GastroenterologyFramingham, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marlena Osowski among 4,985 registered nurse records in Massachusetts
Marlena Osowski is one of 4,985 registered nurse records with a practice address in Massachusetts. 3% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 67% of them.
- NPI issued2023 · 67% of these records are older, 26% newer
- In a Medicare fileYes · 3% of these records are
- In the CMS Doctors and Clinicians fileYes · 2% of these records are
- Graduated2023 · median 2022 among the 110 with a school on file
- Record last updated2023 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 163W00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
684 registered nurse records list a practice address in Boston
They are 684 of the 41,865 NPPES records with a practice address in Boston, and 4,985 registered nurse records in Massachusetts.
All 4,985 in Massachusetts → Every provider in Boston → Registered Nurse nationwide →
The 8 registered nurse records with the nearest ZIP codes
- Melissa Batchelder, NNP-BCBoston, MA 021111558197798
- Maudistien Buggs, RNBoston, MA 021111881416311
- Ellen Chen, RN CPNPBoston, MA 021111316167752
- Kayla Efaw-Bashir, AGACNPBoston, MA 021111831891373
- Kelsey Goodman, RNBoston, MA 021111346913175
- Barbara Lash, R.N.Boston, MA 021111043339658
- Michelle Lew, RNBoston, MA 021111093074288
- George Ortiz, RNBoston, MA 021111336529270
Common questions
What is Marlena Osowski's NPI number?
Marlena Osowski's National Provider Identifier (NPI) is 1386335776, issued on May 16, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Marlena Osowski located?
The NPPES record lists a practice address at 850 Washington St, Boston, MA, 02111. Phone: (617) 636-5000. Providers update this record themselves, so call before visiting.
How can I verify Marlena Osowski's license?
NPPES lists Massachusetts license number RN2354068, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Marlena Osowski prescribe under Medicare Part D?
In 2024, Marlena Osowski had 97 Medicare Part D claims for 57 beneficiaries; the average among registered nurse prescribers was 678. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.