Siobhan Flaherty, NP
Family Nurse Practitioner · Boston, MA
Siobhan Flaherty, NP is a family nurse practitioner with a practice address in Boston, Massachusetts, and NPI 1851974497, issued on May 2, 2021. Check the license (Massachusetts 2021015126, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Siobhan Flaherty
- Credential
- NP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 2021015126 MA
Self-reported in NPPES; status is on the state search - Practice location
- 330 Brookline Ave, Boston, MA 02215
- Phone
- (617) 667-3874
- Enumerated
- May 2, 2021
- Record last updated
- May 2, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20211006003326); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 4,724 in Massachusetts → Look up another NPI →
Also registered at 330 Brookline Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Siobhan Flaherty in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license 2021015126Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
53% more Medicare Part D claims than the average family nurse practitioner in 2024
1,992 Medicare Part D claims for 459 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. 23 claims were for opioids.
Most prescribed
- Levothyroxine Sodium135 claims
- Atorvastatin Calcium126 claims
- Lisinopril125 claims
- Simvastatin115 claims
- Amlodipine Besylate106 claims
- Hydrochlorothiazide73 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.
Bills Medicare through one group practice
- Atrius Health IncBraintree, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Siobhan Flaherty among 4,724 family nurse practitioner records in Massachusetts
Siobhan Flaherty, NP is one of 4,724 family nurse practitioner records with a practice address in Massachusetts. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 67% of them.
- NPI issued2021 · 67% of these records are older, 28% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2021 · median 2019 among the 2,704 with a school on file
- Record last updated2021 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
938 family nurse practitioner records list a practice address in Boston
They are 938 of the 41,865 NPPES records with a practice address in Boston, and 4,724 family nurse practitioner records in Massachusetts.
All 4,724 in Massachusetts → Every provider in Boston → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Jennifer Brown, CNPBoston, MA 022151861460776
- Nicole Catatao, NPBoston, MA 022151588830160
- Nicole Desrosiers, N.P.Boston, MA 022151811167992
- Suzanne Dipalma, NPBoston, MA 022151669692455
- Thomas Doyle, FNPBoston, MA 022151912137191
- Cailin Duram, FNPBoston, MA 022151700110012
- Maressa FreitasBoston, MA 022151033342811
- Margaret Killebrew, NPBoston, MA 022151568509404
Common questions
What is Siobhan Flaherty, NP's NPI number?
Siobhan Flaherty, NP's National Provider Identifier (NPI) is 1851974497, issued on May 2, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Siobhan Flaherty, NP located?
The NPPES record lists a practice address at 330 Brookline Ave, Boston, MA, 02215. Phone: (617) 667-3874. Providers update this record themselves, so call before visiting.
How can I verify Siobhan Flaherty, NP's license?
NPPES lists Massachusetts license number 2021015126, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Siobhan Flaherty, NP prescribe under Medicare Part D?
In 2024, Siobhan Flaherty, NP had 1,992 Medicare Part D claims for 459 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.