Cynthia Llerena Sershen, F.N.P.
Nurse Practitioner · Burlington, MA
Cynthia Llerena Sershen, F.N.P. is a nurse practitioner with a practice address in Burlington, Massachusetts, and NPI 1366614497, issued on Mar 28, 2008. Check the license (Massachusetts RN266574, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Cynthia Llerena Sershen
- Credential
- F.N.P.
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License numbers
- RN266574 MA
266574 MA
Self-reported in NPPES; status is on the state search - Practice location
- 41 Mall RD, Burlington, MA 01805
- Phone
- (781) 744-8000
- Enumerated
- Mar 28, 2008
- Record last updated
- Apr 10, 2026
- Medicaid ID
- 110086807A MA
- Medicare enrollment
- Enrolled (PECOS I20091019000606); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 3,480 in Massachusetts → Look up another NPI →
Also registered at 41 Mall RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Juliet Aborn, REGISTERED NURSECertified Registered Nurse Anesthetist1932727930
- Omar Abuqamar, M.D., M.M.S.C.,Ophthalmology Physician1437640414
- Emily Adams, PA-CPhysician Assistant1457685752
- Oluwaseun Adebagbo, MDStudent in an Organized Health Care Education/Training Program1588468755
- Christopher Adler, PAPhysician Assistant1972848463
- Tinamarie Adly, NPFamily Nurse Practitioner1154041572
Verify Cynthia Llerena Sershen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license RN266574Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
6% more Medicare Part D claims than the average nurse practitioner in 2024
1,170 Medicare Part D claims for 426 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Triamcinolone Acetonide171 claims
- Ketoconazole117 claims
- Minoxidil112 claims
- Betamethasone Diprop Augmented80 claims
- Mupirocin59 claims
- Betamethasone Dipropionate54 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: $120.97
2 payments; by number, the most common kind was education; the largest payer was Janssen Biotech, Inc. The 38,884 providers of this specialty with any payment received $791.64 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 one group practice
- Lahey Clinic IncPeabody, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Cynthia Llerena Sershen among 3,480 nurse practitioner records in Massachusetts
Cynthia Llerena Sershen, F.N.P. is one of 3,480 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 2008, is newer than 31% of them.
- NPI issued2008 · 31% of these records are older, 67% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 56% of these records are
- Graduated2007 · median 2017 among the 1,963 with a school on file
- Record last updated2026 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
150 nurse practitioner records list a practice address in Burlington
They are 150 of the 2,620 NPPES records with a practice address in Burlington, and 3,480 nurse practitioner records in Massachusetts.
All 3,480 in Massachusetts → Every provider in Burlington → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Marcia Chwalek, NPBurlington, MA 018051922095629
- Jacqueline Danis, ANPBurlington, MA 018051972597599
- Kathleen Fischer, NPBurlington, MA 018051477572907
- Cara Foss, N.P.Burlington, MA 018051790750354
- Emily Gorman-Melo, APRNBurlington, MA 018051285654996
- Julie Jones, NPBurlington, MA 018051568455350
- Susan Koen, RNPBurlington, MA 018051932142411
- Margaret Macy, N.P.Burlington, MA 018051790733392
Common questions
What is Cynthia Llerena Sershen, F.N.P.'s NPI number?
Cynthia Llerena Sershen, F.N.P.'s National Provider Identifier (NPI) is 1366614497, issued on Mar 28, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Cynthia Llerena Sershen, F.N.P. located?
The NPPES record lists a practice address at 41 Mall RD, Burlington, MA, 01805. Phone: (781) 744-8000. Providers update this record themselves, so call before visiting.
How can I verify Cynthia Llerena Sershen, F.N.P.'s license?
NPPES lists Massachusetts license number RN266574, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Cynthia Llerena Sershen, F.N.P. prescribe under Medicare Part D?
In 2024, Cynthia Llerena Sershen, F.N.P. had 1,170 Medicare Part D claims for 426 beneficiaries; the average among nurse practitioner prescribers was 1,109. 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.