Lena Lax, NP
Nurse Practitioner · Cambridge, MA
Lena Lax, NP is a nurse practitioner with a practice address in Cambridge, Massachusetts, and NPI 1417406976, issued on Sep 26, 2016. Check the license (Massachusetts RN2298221, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Lena Lax
- Credential
- NP
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License numbers
- RN2298221 MA
2298221 MA
95011726 CA
Self-reported in NPPES; status is on the state search - Practice location
- 822 Somerville Ave, Cambridge, MA 02140
- Phone
- (888) 663-6331
- Enumerated
- Sep 26, 2016
- Record last updated
- Mar 17, 2025
- Fax
- (415) 252-7176
- Medicare enrollment
- Enrolled (PECOS I20170216001895); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 3,480 in Massachusetts → Look up another NPI →
Also registered at 822 Somerville Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Radelys German, MDFamily Medicine Physician1487394433
- Sherry Graham, M.D.Family Medicine Physician1104811611
- Gabriella Pugliese, PHARM.D.Pharmacist1851731822
- Amanda Santos, PHARMDPharmacist1780063016
Verify Lena Lax in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license RN2298221Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average nurse practitioner in 2024
27 Medicare Part D claims for 13 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D.
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
- Mass General Brigham Community Physicians IncCambridge, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Lena Lax among 3,480 nurse practitioner records in Massachusetts
Lena Lax, NP 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 2016, is newer than 51% of them.
- NPI issued2016 · 51% of these records are older, 45% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 56% of these records are
- Graduated2016 · median 2017 among the 1,963 with a school on file
- Record last updated2025 · 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).
52 nurse practitioner records list a practice address in Cambridge
They are 52 of the 5,145 NPPES records with a practice address in Cambridge, and 3,480 nurse practitioner records in Massachusetts.
All 3,480 in Massachusetts → Every provider in Cambridge → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Alyssa CarrollCambridge, MA 021401104451632
- Donna George, NPCambridge, MA 021401184825960
- Paula Cushner, MSN, RN, ANP-BCCambridge, MA 021391306984372
- Jane D'Addario, MSN, NP-CCambridge, MA 021391508312760
- Denise Defilippi, APRNCambridge, MA 021391114939188
- Mary Elliot, APRNCambridge, MA 021391083773402
- Cassandra Fox, RN, FNP-CCambridge, MA 021391629723549
- Marie Girault, NPCambridge, MA 021391043379191
Common questions
What is Lena Lax, NP's NPI number?
Lena Lax, NP's National Provider Identifier (NPI) is 1417406976, issued on Sep 26, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Lena Lax, NP located?
The NPPES record lists a practice address at 822 Somerville Ave, Cambridge, MA, 02140. Phone: (888) 663-6331. Providers update this record themselves, so call before visiting.
How can I verify Lena Lax, NP's license?
NPPES lists Massachusetts license number RN2298221, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Lena Lax, NP prescribe under Medicare Part D?
In 2024, Lena Lax, NP had 27 Medicare Part D claims for 13 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.