John I. Siekierka, DO
Emergency Medicine Physician · Marlton, NJ
John I. Siekierka, DO is an emergency medicine physician with a practice address in Marlton, New Jersey, and NPI 1134175292, issued on May 26, 2006. Check the license (New Jersey 25MB05718100, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- John I. Siekierka
- Credential
- DO
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 25MB05718100 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 90 Brick RD, Marlton, NJ 08053
- Phone
- (856) 355-6760
- Enumerated
- May 26, 2006
- Record last updated
- Feb 6, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (856) 355-6061
- Medicaid ID
- 5181305 NJ
- Medicare enrollment
- Enrolled (PECOS I20040810001114); accepts Medicare assignment
- Medical or professional school
- Philadelphia College Of Osteopathic Medicine, 1988
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,754 in New Jersey → Look up another NPI →
Also registered at 90 Brick RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Anthony Capraro, DO, MBSEmergency Medicine Physician1376287300
- Haritha Chityala, MDAnesthesiology Physician1306876305
- Omar Elkattawy, MDHospitalist Physician1386387421
- Erica Fine, D.O.Emergency Medicine Physician1114247970
- Emily Gevins, MDEmergency Medicine Physician1174228944
- Michele McNultyPhysical Therapist1811018229
Verify John I. Siekierka in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Jersey State Board of Medical Examiners
Search for license 25MB05718100Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
34% more Medicare Part D claims than the average emergency medicine physician in 2024
302 Medicare Part D claims for 256 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Most prescribed
- Cephalexin66 claims
- Azithromycin36 claims
- Prednisone28 claims
- Nitrofurantoin Mono-Macro20 claims
- Albuterol Sulfate Hfa19 claims
- Amoxicillin18 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.
Industry payments in 2024: $124.99
1 payment: food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 12,335 providers of this specialty with any payment received $953.79 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Hunterdon Urgent Care PCFlemington, NJ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John I. Siekierka among 1,754 emergency medicine physician records in New Jersey
John I. Siekierka, DO is one of 1,754 emergency medicine physician records with a practice address in New Jersey. 83% 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 4% of them.
- NPI issued2006 · 4% of these records are older, 61% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated1988 · median 2011 among the 1,167 with a school on file
- Record last updated2014 · 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 Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in New Jersey
There are 1,754 emergency medicine physician records in New Jersey.
All 1,754 in New Jersey → Every provider in Marlton → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Anthony Capraro, DO, MBSMarlton, NJ 080531376287300
- Erica Fine, D.O.Marlton, NJ 080531114247970
- Emily Gevins, MDMarlton, NJ 080531174228944
- Stuart Solomon, DOMarlton, NJ 080531467492744
- Stephen Stafford, D.OMarlton, NJ 080531669886768
- Jennifer Resnick MatroMount Laurel, NJ 080541265488951
- Elizabeth SchiffenhausMedford, NJ 080551720440563
- Reuben Ash, M.D.Manahawkin, NJ 080501861430654
Common questions
What is John I. Siekierka, DO's NPI number?
John I. Siekierka, DO's National Provider Identifier (NPI) is 1134175292, issued on May 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John I. Siekierka, DO located?
The NPPES record lists a practice address at 90 Brick RD, Marlton, NJ, 08053. Phone: (856) 355-6760. Providers update this record themselves, so call before visiting.
How can I verify John I. Siekierka, DO's license?
NPPES lists New Jersey license number 25MB05718100, as entered by the provider. Search the New Jersey State Board of Medical Examiners at https://newjersey.mylicense.com/verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John I. Siekierka, DO prescribe under Medicare Part D?
In 2024, John I. Siekierka, DO had 302 Medicare Part D claims for 256 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.