Tristan Diaz, FNP
Nurse Practitioner · Cambridge, MA
Tristan Diaz, FNP is a nurse practitioner with a practice address in Cambridge, Massachusetts, and NPI 1487127031, issued on Jan 7, 2019. Check the license with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Tristan Diaz
- Credential
- FNP
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License numbers
- 903153 MS
1-146825 AL
Self-reported in NPPES; status is on the state search - Practice location
- 75 Mount Auburn St, Cambridge, MA 02138
- Phone
- (617) 384-5869
- Enumerated
- Jan 7, 2019
- Record last updated
- Aug 25, 2022
- Medicare enrollment
- Enrolled (PECOS I20220919002387); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 3,480 in Massachusetts → Look up another NPI →
Also registered at 75 Mount Auburn St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Tristan Diaz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this professionCheck 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
21 Medicare Part D claims for 15 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.
Industry payments in 2024: $28.73
2 payments; by number, the most common kind was food and beverage; the largest payer was Abiomed. 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
- President And Fellows OF Harvard CollegeCambridge, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Tristan Diaz among 3,480 nurse practitioner records in Massachusetts
Tristan Diaz, FNP 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 2019, is newer than 63% of them.
- NPI issued2019 · 63% of these records are older, 32% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 56% of these records are
- Graduated2019 · median 2017 among the 1,963 with a school on file
- Record last updated2022 · 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
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- Sharon Follayttar, NPCambridge, MA 021381639104110
- Maria Francesconi, NPCambridge, MA 021381720007255
- Virginia Grassa, NPCambridge, MA 021381982639464
- Donna Gross, NPCambridge, MA 021381760401285
- Yolanda Hobin, NPCambridge, MA 021381336174812
- Audrey Killion, NPCambridge, MA 021381700805231
Common questions
What is Tristan Diaz, FNP's NPI number?
Tristan Diaz, FNP's National Provider Identifier (NPI) is 1487127031, issued on Jan 7, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Tristan Diaz, FNP located?
The NPPES record lists a practice address at 75 Mount Auburn St, Cambridge, MA, 02138. Phone: (617) 384-5869. Providers update this record themselves, so call before visiting.
How can I verify Tristan Diaz, FNP's license?
Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Tristan Diaz, FNP prescribe under Medicare Part D?
In 2024, Tristan Diaz, FNP had 21 Medicare Part D claims for 15 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.