Melvin Diaz
Physician Assistant · Baltimore, MD
Melvin Diaz is a physician assistant with a practice address in Baltimore, Maryland, and NPI 1093586323, issued on Jan 15, 2024. Check the license with the Maryland board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Melvin Diaz
- Primary taxonomy
- Physician Assistant 363A00000X
- Practice location
- 1800 Orleans St, Baltimore, MD 21287
- Phone
- (410) 955-5000
- Enumerated
- Jan 15, 2024
- Record last updated
- Jan 15, 2024
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 3,224 in Maryland → Look up another NPI →
Also registered at 1800 Orleans St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Melvin Diaz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland 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
90% fewer Medicare Part D claims than the average physician assistant in 2024
79 Medicare Part D claims for 29 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. 22 claims were for opioids.
Most prescribed
- Oxycodone Hcl15 claims
- Enoxaparin Sodium12 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.
Melvin Diaz among 3,224 physician assistant records in Maryland
Melvin Diaz is one of 3,224 physician assistant records with a practice address in Maryland. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2024, is newer than 86% of them.
- NPI issued2024 · 86% of these records are older, 8% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileNo · 61% of these records are
- Record last updated2024 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,135 physician assistant records list a practice address in Baltimore
They are 1,135 of the 35,183 NPPES records with a practice address in Baltimore, and 3,224 physician assistant records in Maryland.
All 3,224 in Maryland → Every provider in Baltimore → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Alice Armour, P.A.-C.Baltimore, MD 212871659336410
- Glenn Beauman, P.A.-C.Baltimore, MD 212871407811391
- Nancy Crawford, P.A.-C.Baltimore, MD 212871215985775
- Mandy David, P.A.-C.Baltimore, MD 212871902858715
- William Fleming, PA-CBaltimore, MD 212871477501385
- Karen Frangione, PACBaltimore, MD 212871639131634
- John Gerwig, P.A.-C.Baltimore, MD 212871750335105
- Rebecca Godfrey, P.A.-C.Baltimore, MD 212871255385522
Common questions
What is Melvin Diaz's NPI number?
Melvin Diaz's National Provider Identifier (NPI) is 1093586323, issued on Jan 15, 2024. An NPI identifies a provider in billing; it is not a license.
Where is Melvin Diaz located?
The NPPES record lists a practice address at 1800 Orleans St, Baltimore, MD, 21287. Phone: (410) 955-5000. Providers update this record themselves, so call before visiting.
How can I verify Melvin Diaz's license?
Search the Maryland board that licenses this profession; the NPPES record confirms identity only.
How much does Melvin Diaz prescribe under Medicare Part D?
In 2024, Melvin Diaz had 79 Medicare Part D claims for 29 beneficiaries; the average among physician assistant prescribers was 830. 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.