Delna Mary John, MD
Emergency Medicine Physician · Brooklyn, NY
Delna Mary John, MD is an emergency medicine physician with a practice address in Brooklyn, New York, and NPI 1710340567, issued on Mar 30, 2016. Check the license (New York 304811, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Delna Mary John
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 304811 NY
Self-reported in NPPES; status is on the state search - Practice location
- 450 Clarkson Ave, Brooklyn, NY 11203
- Phone
- (917) 544-4787
- Enumerated
- Mar 30, 2016
- Record last updated
- Aug 9, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20200909000558); accepts Medicare assignment
- Medical or professional school
- Eastern Virginia Medical School, 2016
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 5,025 in New York → Look up another NPI →
Also registered at 450 Clarkson Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Rabab Abdalla, MDStudent in an Organized Health Care Education/Training Program1780325621
- Marie Abdallah, MDStudent in an Organized Health Care Education/Training Program1073743639
- Ahmed AbdelfattahStudent in an Organized Health Care Education/Training Program1508708959
- Haram AbdelmajidStudent in an Organized Health Care Education/Training Program1093348054
- Sara AbdelrahamanStudent in an Organized Health Care Education/Training Program1659143568
Verify Delna Mary John in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 304811Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
17% more Medicare Part D claims than the average emergency medicine physician in 2024
265 Medicare Part D claims for 159 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims.
Most prescribed
- Ibuprofen32 claims
- Cefpodoxime Proxetil26 claims
- Azithromycin18 claims
- Prednisone18 claims
- Ondansetron Odt17 claims
- Amoxicillin-Clavulanate Potass14 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 MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Trustees OF Columbia University IN The City OF New YorkNew York, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Delna Mary John among 5,025 emergency medicine physician records in New York
Delna Mary John, MD is one of 5,025 emergency medicine physician records with a practice address in New York. 86% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 67% of them.
- NPI issued2016 · 67% of these records are older, 29% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2016 · median 2013 among the 3,232 with a school on file
- Record last updated2021 · 55% 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 New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
719 emergency medicine physician records list a practice address in Brooklyn
They are 719 of the 64,057 NPPES records with a practice address in Brooklyn, and 5,025 emergency medicine physician records in New York.
All 5,025 in New York → Every provider in Brooklyn → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
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- Gerard Casey, MDBrooklyn, NY 112031194717868
- Joseph Chirayil, MDBrooklyn, NY 112031023000916
- Ian Desouza, MDBrooklyn, NY 112031659363448
- Rachel GeorgeBrooklyn, NY 112031588656052
- Aleksandr Gleyzer, MDBrooklyn, NY 112031417949165
- Ernst Gustave, MDBrooklyn, NY 112031124010871
Common questions
What is Delna Mary John, MD's NPI number?
Delna Mary John, MD's National Provider Identifier (NPI) is 1710340567, issued on Mar 30, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Delna Mary John, MD located?
The NPPES record lists a practice address at 450 Clarkson Ave, Brooklyn, NY, 11203. Phone: (917) 544-4787. Providers update this record themselves, so call before visiting.
How can I verify Delna Mary John, MD's license?
NPPES lists New York license number 304811, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Delna Mary John, MD prescribe under Medicare Part D?
In 2024, Delna Mary John, MD had 265 Medicare Part D claims for 159 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Delna Mary John, MD's MIPS final score?
The 2023 MIPS final score is 100 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.