Are you Dr. Oppenheimer? This profile is yours to edit: update your address, phone, photo and services.
Edit this profileAt a glance
- 8 Saddle Rd, First Floor, Cedar Knolls, NJ 07927
About Dr. Oppenheimer
John J. Oppenheimer, MD practices allergy in Cedar Knolls, NJ. John is a 1986 graduate of Temple University School of Medicine. Medicare claims data shows John provided 5,844 services to 567 patients. The services billed most often include injection, omalizumab, 5 mg, injection, benralizumab, 1 mg, and test for allergy using allergenic extract. The provider's National Provider Identifier (NPI) is 1639170871.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (908) 934-0555
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
8 SADDLE RD FIRST FLOOR
Cedar Knolls, NJ 07927
Procedures Most Often Billed to Medicare
5,844 services · 567 patients · 9 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Test for allergy using allergenic extract | Treatment | 95004 |
1,093 | As often as other peers in Allergy |
| Injection of drug or substance under skin or into muscle | Treatment | 96372 |
143 | As often as other peers in Allergy |
| Test to measure expiratory airflow and volume | Treatment | 94010 |
140 | More often than most peers in Allergy |
| Injection, omalizumab, 5 mg | Drug given | J2357 |
2,490 | Less often than most peers in Allergy |
| Injection, benralizumab, 1 mg | Drug given | J0517 |
1,500 | Too few peers to compare |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
215 | More often than most peers in Allergy |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
144 | More often than most peers in Allergy |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
99 | More than most peers in Allergy |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
20 | As often as other peers in Allergy |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other allergy specialists at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 18 related providers in 3 groups
Trained at Temple University School of Medicine 3
Other providers in the same specialty who trained at the same institution.
Class of 1986 at Temple University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Test for allergy using allergenic extract 7
Providers in NJ who bill this service to Medicare most often.
Common questions
What does Dr. Oppenheimer specialize in?
Dr. Oppenheimer is an allergy in Cedar Knolls, NJ. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is Dr. Oppenheimer located?
Dr. Oppenheimer is listed at 8 Saddle Rd First Floor, Cedar Knolls, NJ 07927. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Oppenheimer's phone number?
The number on file is (908) 934-0555. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Dr. Oppenheimer?
Dr. Oppenheimer's National Provider Identifier is 1639170871. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Oppenheimer go to medical school?
Dr. Oppenheimer attended Temple University School of Medicine, graduating in 1986. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Oppenheimer have?
Dr. Oppenheimer has 40 years experience. Calculated from a graduation year of 1986, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Oppenheimer do most often?
According to Medicare billing data, Dr. Oppenheimer provides treatments such as test for allergy using allergenic extract and injection of drug or substance under skin or into muscle, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Oppenheimer's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Oppenheimer. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.