Steven E. Diaz, MD
Emergency Medicine Physician · Waterville, ME
Steven E. Diaz, MD is an emergency medicine physician with a practice address in Waterville, Maine, and NPI 1346201522, issued on Mar 29, 2006. Check the license (Maine 014039, as entered in NPPES) on the Maine Board of Licensure in Medicine; the Medicare figures below come from public CMS files.
- Name
- Steven E. Diaz
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 014039 ME
Self-reported in NPPES; status is on the state search - Practice location
- 149 North St, Waterville, ME 04901
- Phone
- (207) 626-1018
- Enumerated
- Mar 29, 2006
- Record last updated
- Jul 30, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (207) 626-1214
- Medicaid ID
- 336020099 ME
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 466 in Maine → Look up another NPI →
Also registered at 149 North St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ahmed Aldilaimi, MDHospitalist Physician1497721849
- Alycia Allen, MSN, NP-CFamily Nurse Practitioner1083046718
- Michael Antoniello, M.D.Emergency Medicine Physician1568470953
- Amethyst Arceo, DOFamily Medicine Physician1801913553
- Timothy Axelson, CRNACertified Registered Nurse Anesthetist1649219353
- Faith Ayepola, MDStudent in an Organized Health Care Education/Training Program1922932417
Verify Steven E. Diaz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaine Board of Licensure in Medicine
Search for license 014039Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Most of these Medicare Part D claims are vaccines, 100% of the cost of the top drugs
727 Medicare Part D claims for 727 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 100% of claims.
Most prescribed
Pharmacies often give vaccines under a standing order that names one clinician, and CMS counts every such claim under that clinician's NPI. These claims are therefore not a measure of this clinician's own prescribing.
- Arexvy727 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.
Steven E. Diaz among 466 emergency medicine physician records in Maine
Steven E. Diaz, MD is one of 466 emergency medicine physician records with a practice address in Maine. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 62% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2008 · 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 207P00000X and a Maine practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
13 emergency medicine physician records list a practice address in Waterville
They are 13 of the 870 NPPES records with a practice address in Waterville, and 466 emergency medicine physician records in Maine.
All 466 in Maine → Every provider in Waterville → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Deep Acharya, M.D.Waterville, ME 049011427242940
- Michael Antoniello, M.D.Waterville, ME 049011568470953
- Sally Chapin, MDWaterville, ME 049011316906852
- Barbara Covey, MDWaterville, ME 049011710948138
- John Garofalo, MDWaterville, ME 049011659426989
- Lawrence Kassman, MDWaterville, ME 049011962461954
- Beverly Kimpel, MDWaterville, ME 049011861468506
- Dennis McCann, MDWaterville, ME 049011578522488
Common questions
What is Steven E. Diaz, MD's NPI number?
Steven E. Diaz, MD's National Provider Identifier (NPI) is 1346201522, issued on Mar 29, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Steven E. Diaz, MD located?
The NPPES record lists a practice address at 149 North St, Waterville, ME, 04901. Phone: (207) 626-1018. Providers update this record themselves, so call before visiting.
How can I verify Steven E. Diaz, MD's license?
NPPES lists Maine license number 014039, as entered by the provider. Search the Maine Board of Licensure in Medicine at https://www.maine.gov/md/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Steven E. Diaz, MD prescribe under Medicare Part D?
In 2024, Steven E. Diaz, MD had 727 Medicare Part D claims for 727 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.