Mario Diaz, P.A.
Internal Medicine Physician · Salem, OR
Mario Diaz, P.A. is an internal medicine physician with a practice address in Salem, Oregon, and NPI 1164460697, issued on Jun 4, 2006. Check the license (Oregon PA057229, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mario Diaz
- Credential
- P.A.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- PA057229 OR
Self-reported in NPPES; status is on the state search - Practice location
- 2020 Capitol St NE, Salem, OR 97303
- Phone
- (503) 399-2424
- Enumerated
- Jun 4, 2006
- Record last updated
- Jan 18, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (503) 375-7429
- Medicaid ID
- 057229 OR
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,116 in Oregon → Look up another NPI →
Also registered at 2020 Capitol St NE
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Howard Baumann, M.D.Gastroenterology Physician1770526238
- Michael Bowen, M.D.Obstetrics & Gynecology Physician1467494575
- Heather Burgin, M.D.Internal Medicine Physician1912947334
- James Byrkit, M.D.Internal Medicine Physician1881637288
- Laura Chong, M.D.Obstetrics & Gynecology Physician1831133313
- John Daniels, MDFamily Medicine Physician1518909506
Verify Mario Diaz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license PA057229Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
100% fewer Medicare Part D claims than the average internal medicine physician in 2024
11 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Nortriptyline Hcl11 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.
Mario Diaz among 2,116 internal medicine physician records in Oregon
Mario Diaz, P.A. is one of 2,116 internal medicine physician records with a practice address in Oregon. 73% 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 7% of them.
- NPI issued2006 · 7% of these records are older, 54% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileNo · 58% of these records are
- Record last updated2010 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
86 internal medicine physician records list a practice address in Salem
They are 86 of the 6,700 NPPES records with a practice address in Salem, and 2,116 internal medicine physician records in Oregon.
All 2,116 in Oregon → Every provider in Salem → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Heather Burgin, M.D.Salem, OR 973031912947334
- James Byrkit, M.D.Salem, OR 973031881637288
- Stephen Carp, D.O.Keizer, OR 973031881638310
- Robin Chandler, M.D.Keizer, OR 973031770522609
- Mark Fischl, M.D.Salem, OR 973031558302984
- William Gillespie, M.D.Salem, OR 973031497797310
- Paul Huun, M.D.Salem, OR 973031700824810
- Gregory Lackides, M.D.Salem, OR 973031770522690
Common questions
What is Mario Diaz, P.A.'s NPI number?
Mario Diaz, P.A.'s National Provider Identifier (NPI) is 1164460697, issued on Jun 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mario Diaz, P.A. located?
The NPPES record lists a practice address at 2020 Capitol St NE, Salem, OR, 97303. Phone: (503) 399-2424. Providers update this record themselves, so call before visiting.
How can I verify Mario Diaz, P.A.'s license?
NPPES lists Oregon license number PA057229, as entered by the provider. Search the Oregon Medical Board at https://www.oregon.gov/OMB/Pages/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mario Diaz, P.A. prescribe under Medicare Part D?
In 2024, Mario Diaz, P.A. had 11 Medicare Part D claims; the average among internal medicine physician prescribers was 3,176. 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.