Registry data as of Aug 27, 2026

Emma Diiorio, M.D.

Rheumatology Physician · Rockville, MD

Emma Diiorio, M.D. is a rheumatology physician with a practice address in Rockville, Maryland, and NPI 1528067808, issued on Jul 19, 2005. Check the license (Maryland D0044503, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.

Record from CMS NPPES, loaded Aug 27, 2026 · Medicare files 2023 and 2024 · method · Verify with CMS →

NPPES recordas of Aug 27, 2026
1528067808
Name
Emma Diiorio
Credential
M.D.
Primary taxonomy
Rheumatology Physician 207RR0500X
License number
D0044503 MD
Self-reported in NPPES; status is on the state search
Practice location
14995 Shady Grove RD, Rockville, MD 20850
Phone
(301) 942-7600
Enumerated
Jul 19, 2005
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 14995 Shady Grove RD

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Joshua Eppinger, OTR/LOccupational Therapist1659890978
  2. Blake Leibowitz, PA-CPhysician Assistant1578012118
  3. Myria Petrou, MBCHBDiagnostic Radiology Physician1245351733

Verify Emma Diiorio in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMaryland Board of Physicians
    Search for license D0044503
    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
Open the Maryland license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

29% fewer Medicare Part D claims than the average rheumatology physician in 2024

1,453 Medicare Part D claims for 297 beneficiaries, against an average of 2,058 among the 4,833 providers of this specialty who prescribed in Part D. 31 claims were for opioids.

  1. Emma Diiorio1,453
  2. Specialty average2,058

Most prescribed

  1. Alendronate Sodium234 claims
  2. Methotrexate167 claims
  3. Hydroxychloroquine Sulfate132 claims
  4. Prednisone125 claims
  5. Allopurinol88 claims
  6. Duloxetine Hcl63 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.

The practice group's Medicare quality score for 2023: 77.1 of 100

The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.

  1. Qualityout of 100 · 30% of the final score
  2. Costout of 100 · 30%23.7
  3. Promoting interoperabilityout of 100 · 25%100.0
  4. Improvement activities40 of 40 points · 15%100.0

Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).

Industry payments in 2024: $62.67

4 payments, mostly food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 3,502 providers of this specialty with any payment received $8,487.29 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Emma Diiorio$62.67
  2. Specialty average$8,487.29

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

2 hospital and facility affiliations

  1. Arthritis And Rheumatism Associates PCRockville, MD
  2. Suburban/nrh Medical Rehabilitation IncBethesda, MD

Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.

Rheumatology Physician providers in Maryland

There are 184 rheumatology physician records in Maryland.

Other rheumatology physician records in Maryland

  1. Jonathan Adelson, M.D.Greenbelt, MD1700864501
  2. Naila Ahmad, MDEaston, MD1366451619
  3. Grace Ahn, M.D.Rockville, MD1982884896
  4. Ashika Ajitkumar, MDBaltimore, MD1659044436
  5. Maria Alba-Dauhajre, MDSilver Spring, MD1487676458
  6. Jemima Felicity Albayda, MDBaltimore, MD1285955765
  7. Shabnam Ali, M.D.Columbia, MD1487837837
  8. Mariam Ameri, MDAnnapolis, MD1588807861
  9. Amanda Auerbach, MDBaltimore, MD1245790187
  10. Alan Baer, MDBaltimore, MD1730155607

Common questions

What is Emma Diiorio, M.D.'s NPI number?

Emma Diiorio, M.D.'s National Provider Identifier (NPI) is 1528067808, issued on Jul 19, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Emma Diiorio, M.D. located?

The NPPES record lists a practice address at 14995 Shady Grove RD, Rockville, MD, 20850. Phone: (301) 942-7600. Providers update this record themselves, so call before visiting.

How can I verify Emma Diiorio, M.D.'s license?

NPPES lists Maryland license number D0044503, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Emma Diiorio, M.D. prescribe under Medicare Part D?

In 2024, Emma Diiorio, M.D. had 1,453 Medicare Part D claims for 297 beneficiaries; the average among rheumatology physician prescribers was 2,058. Part D covers Medicare prescriptions only.

What is Emma Diiorio, M.D.'s Medicare quality score?

The 2023 MIPS final score is 77.1 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.

Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.