John J. Oppenheimer, MD
Allergy Physician · Cedar Knolls, NJ
John J. Oppenheimer, MD is an allergy physician with a practice address in Cedar Knolls, New Jersey, and NPI 1639170871, issued on Aug 10, 2005. Check the license (New Jersey 25MA05056200, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- John J. Oppenheimer
- Credential
- MD
- Primary taxonomy
- Allergy Physician 207KA0200X
- License number
- 25MA05056200 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 8 Saddle RD, Cedar Knolls, NJ 07927
- Phone
- (908) 934-0555
- Enumerated
- Aug 10, 2005
- Record last updated
- May 16, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (973) 540-0472
- Medicaid ID
- 5534500 NJ
- Medicare enrollment
- Enrolled (PECOS I20100311000475); accepts Medicare assignment
- Medical or professional school
- Temple University School Of Medicine, 1986
- Entity
- Type 1 · individual
8 nearest allergy physician records → All 42 in New Jersey → Look up another NPI →
Also registered at 8 Saddle RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Melissa Chendorain, D.P.T.Physical Therapist1619990025
- Michele Dasilva, RRTRegistered Respiratory Therapist1053354290
- Matthew Epstein, MDSleep Medicine (Internal Medicine) Physician1922000793
- Sean Fedyna, M.D.Pulmonary Disease Physician1497071518
- Michelle Glowinski, APNCritical Care Medicine Nurse Practitioner1881194140
- Donatella Graffino, MDAllergy Physician1952302192
Verify John J. Oppenheimer 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 25MA05056200Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
42% more Medicare Part D claims than the average allergy physician in 2024
1,063 Medicare Part D claims for 207 beneficiaries, against an average of 750 among the 645 providers of this specialty who prescribed in Part D. Brand-name drugs were 42% of claims.
Most prescribed
- Montelukast Sodium148 claims
- Fluticasone Propionate140 claims
- Albuterol Sulfate Hfa112 claims
- Trelegy Ellipta104 claims
- Breo Ellipta61 claims
- Azelastine Hcl54 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: $120,023.26
133 payments; by number, the most common kind was food and beverage; the largest payer was GlaxoSmithKline, LLC. The 502 providers of this specialty with any payment received $9,080.33 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
- Jeffrey Weiss, M.D., P.A.Morristown, NJ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John J. Oppenheimer among 42 allergy physician records in New Jersey
John J. Oppenheimer, MD is one of 42 allergy physician records with a practice address in New Jersey. 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 81% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated1986 · median 1987 among the 27 with a school on file
- Record last updated2016 · 74% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207KA0200X and a New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy Physician providers in New Jersey
There are 42 allergy physician records in New Jersey.
All 42 in New Jersey → Every provider in Cedar Knolls → Allergy Physician nationwide →
The 8 allergy physician records with the nearest ZIP codes
- Donatella Graffino, MDCedar Knolls, NJ 079271952302192
- Rebecca Friess, M.D.Berkeley Heights, NJ 079221487098588
- Kristine Cisko, PA-CSummit, NJ 079011780884346
- William Chernack, MDMorristown, NJ 079601013941012
- Colin Reisner, M.D.Morristown, NJ 078691538311311
- Anna Szemiot, M.D.Denville, NJ 078341679711337
- Nicholas Romanoff, MDCherry Hill, NJ 080341316903313
- Maria Lania-Howarth, MDVoorhees, NJ 080431861574295
Common questions
What is John J. Oppenheimer, MD's NPI number?
John J. Oppenheimer, MD's National Provider Identifier (NPI) is 1639170871, issued on Aug 10, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John J. Oppenheimer, MD located?
The NPPES record lists a practice address at 8 Saddle RD, Cedar Knolls, NJ, 07927. Phone: (908) 934-0555. Providers update this record themselves, so call before visiting.
How can I verify John J. Oppenheimer, MD's license?
NPPES lists New Jersey license number 25MA05056200, 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 J. Oppenheimer, MD prescribe under Medicare Part D?
In 2024, John J. Oppenheimer, MD had 1,063 Medicare Part D claims for 207 beneficiaries; the average among allergy physician prescribers was 750. 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.