JOEL MENDELSON MD
NPI 1477612950
Allergy & Immunology in Mountainside, NJ

Q: What is Joel Mendelson's NPI number?

The NPI number for Joel Mendelson is 1477612950. It was assigned to this individual provider in the NPPES registry on December 8, 2006.

Q: What is Joel Mendelson's specialty?

The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.

Q: When was this NPI record last updated?

The NPPES record for Joel Mendelson was last updated on May 2, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since December 08, 2006PECOS EnrolledAccepts Medicare Assignment

1124 SPRINGFIELD AVE, MOUNTAINSIDE, NJ 07092(908) 233-4477 Get Directions Write a Review

NPPES record last updated: May 2, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Joel Mendelson Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JOEL MENDELSON MD (NPI 1477612950) is an individual allergy & immunology provider in Mountainside, New Jersey, licensed in New Jersey (25MA04738300) and active in the NPI registry since December 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1982).

NPPES Registry Identity

NPI1477612950

Entity TypeIndividualMale

Primary Taxonomy207K00000X

Provider Legal NameJOEL MENDELSONCredential: MD

Location Address1124 SPRINGFIELD AVEMountainside, NJ 07092-2906

Mailing Address1124 Springfield AveMountainside, NJ 07092-2906 · (908) 233-4477

Phone(908) 233-4477

Sole ProprietorYes

Medical School CMSOtherGraduated 1982

Enumeration DateDecember 8, 2006

Last NPPES UpdateMay 2, 2024

NPPES CertifiedMay 2, 2024

✔ NPI 1477612950 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyAllergy & ImmunologyAllopathic & Osteopathic Physicians

Taxonomy Code207K00000X

License✔ Licensed in NJ · 25MA04738300

Definition

An allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Selected examples of such conditions include asthma, anaphylaxis, rhinitis, eczema, and adverse reactions to drugs, foods, and insect stings as well as immune deficiency diseases (both acquired and congenital), defects in host defense, and problems related to autoimmune disease, organ transplantation, or malignancies of the immune system.

Also ListedPediatrics · Pediatric Infectious DiseasesTaxonomy 2080P0208X · License 25MA04738300 (NJ)

1124 SPRINGFIELD AVE, Mountainside, NJ 07092

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware, Oscar Health.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Joel Mendelson Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7618877606

PECOS Enrollment IDI20040113000738

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Joel Mendelson reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Summit Medical Group PA

3.9 mi

Multi-Specialty

1 DIAMOND HILL RD, SUMMIT MEDICAL GROUP
Berkeley Heights, NJ 07922

Reassigned Medicare billing, New Jersey enrollment
1,184 clinicians in this Medicare group

NPI 1942254347 (908) 273-4300

Rwjbh Observation Associates LLC

6.3 mi

Emergency Medicine

94 OLD SHORT HILLS RD
Livingston, NJ 07039

Reassigned Medicare billing, New Jersey enrollment
1,913 clinicians in this Medicare group

NPI 1760095806 (888) 724-7123

Barnabas Health Medical Group PC

6.4 mi

Specialist

225 WILLIAMSON ST
Elizabeth, NJ 07202

Reassigned Medicare billing, New Jersey enrollment
1,894 clinicians in this Medicare group

NPI 1841557246 (888) 724-7123

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Professional service for preparation and provision of 1 or more antigens 95165

This service involves the creation and supply of antigens, substances that stimulate your immune system to fight diseases. These antigens can be used in vaccines or allergy tests to help your body build defenses against specific health threats.

191 services22 patients

Professional service for multiple injections of allergen 95117

The professional service for multiple injections of allergens involves administering small doses of specific allergens into your body. This is done to help your immune system become less sensitive to them, reducing your allergic reaction over time. It's a safe, effective way to manage allergies.

182 services39 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

19 services13 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

11 services11 patients

Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. LAURA CRISTINA ANDREIAS M.D., M.S.

Internal Medicine (Gastroenterology)

1124 SPRINGFIELD AVE
MOUNTAINSIDE, NJ 07092

Union County (201) 677-2267

DR. LAURA ANDREIAS GASTROENTEROLOGY LLC

Internal Medicine (Gastroenterology)

1124 SPRINGFIELD AVE
MOUNTAINSIDE, NJ 07092

Union County (201) 677-2267

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Joel Mendelson's NPI number?

The NPI number for Joel Mendelson is 1477612950. It was assigned to this individual provider in the NPPES registry on December 8, 2006.

Where is Joel Mendelson located?

Joel Mendelson practices at 1124 Springfield Ave, Mountainside, NJ 07092. The listed phone number is (908) 233-4477.

What is Joel Mendelson's specialty?

The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.

Is Joel Mendelson enrolled in Medicare?

Yes. Joel Mendelson is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Joel Mendelson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Joel Mendelson reassigns Medicare benefits to 3 organizations: Summit Medical Group PA (Berkeley Heights, NJ), Rwjbh Observation Associates LLC (Livingston, NJ) and Barnabas Health Medical Group PC (Elizabeth, NJ). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Joel Mendelson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Joel Mendelson accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Oscar Health list Joel Mendelson as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Joel Mendelson was last updated on May 2, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.