Arley Diaz, MD
Nephrology Physician · West Springfield, MA
Arley Diaz, MD is a nephrology physician with a practice address in West Springfield, Massachusetts, and NPI 1093706525, issued on Nov 3, 2005. Check the license (Massachusetts 207657, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Arley Diaz
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License numbers
- 207657 MA
042575 CT
Self-reported in NPPES; status is on the state search - Practice location
- 134 Capital Dr Ste E, West Springfield, MA 01089
- Phone
- (413) 733-0010
- Enumerated
- Nov 3, 2005
- Record last updated
- Jan 11, 2022
- Fax
- (413) 417-2978
- Medicaid IDs
- 003138874 CT
110001613A MA - Medicare enrollment
- Enrolled (PECOS I20040813000758); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 417 in Massachusetts → Look up another NPI →
Also registered at 134 Capital Dr Ste E
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gregory Braden, MDNephrology Physician1609866755
- Spencer Hodgins, M.D.Nephrology Physician1194100792
- Jyovani Joubert, PA-CPhysician Assistant1083062863
- Daniel Landry, D.O.Nephrology Physician1801876008
- Melissa Madamas, FNP-CNurse Practitioner1801657374
- Jennifer Mol, PAPhysician Assistant1255629101
Verify Arley Diaz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 207657Check 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% more Medicare Part D claims than the average nephrology physician in 2024
2,718 Medicare Part D claims for 473 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Calcitriol256 claims
- Lisinopril197 claims
- Doxazosin Mesylate169 claims
- Jardiance142 claims
- Losartan Potassium127 claims
- Allopurinol111 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
- Kidney Care And Transplant Services OF New England PCWest Springfield, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Arley Diaz among 417 nephrology physician records in Massachusetts
Arley Diaz, MD is one of 417 nephrology physician records with a practice address in Massachusetts. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 84% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1994 · median 2001 among the 295 with a school on file
- Record last updated2022 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Massachusetts
There are 417 nephrology physician records in Massachusetts.
All 417 in Massachusetts → Every provider in West Springfield → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Gregory Braden, MDWest Springfield, MA 010891609866755
- Spencer Hodgins, M.D.West Springfield, MA 010891194100792
- Daniel Landry, D.O.West Springfield, MA 010891801876008
- Jeffrey Mulhern, MDWest Springfield, MA 010891063402105
- Anthony Poindexter, MDWest Springfield, MA 010891356331474
- Melissa Vega, MDWest Springfield, MA 010891659824415
- Marat Abdullin, M.D.Springfield, MA 011041619159712
- Shirley Whitaker, MDSpringfield, MA 011041376524199
Common questions
What is Arley Diaz, MD's NPI number?
Arley Diaz, MD's National Provider Identifier (NPI) is 1093706525, issued on Nov 3, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Arley Diaz, MD located?
The NPPES record lists a practice address at 134 Capital Dr Ste E, West Springfield, MA, 01089. Phone: (413) 733-0010. Providers update this record themselves, so call before visiting.
How can I verify Arley Diaz, MD's license?
NPPES lists Massachusetts license number 207657, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Arley Diaz, MD prescribe under Medicare Part D?
In 2024, Arley Diaz, MD had 2,718 Medicare Part D claims for 473 beneficiaries; the average among nephrology physician prescribers was 1,465. 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.