NPI registry status
Active
2026 NPPES data Clinical & Laboratory Immunology (Allergy & Immunology) Physician NPI 1154352987 M.D.
Verify on CMS → Leonard Bielory, M.D.
Clinical & Laboratory Immunology (Allergy & Immunology) Physician in Springfield, New Jersey.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 97 in Clinical & Laboratory Immunology (Allergy & Immunology) Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
104
Medicare Part D claims · 32 beneficiaries · Clinical & Laboratory Immunology (Allergy & Immunology) Physician avg: 773
Generic prescribing
61%
generic claims · 39% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$3.7K
17 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Leonard Bielory, M.D. filed 104 Medicare Part D claims in 2024 as a Clinical & Laboratory Immunology (Allergy & Immunology) Physician in Springfield, New Jersey, prescribing 61% generic.
- 104
- Part D claims, 2024
- 61%
- generic prescribing
- $3.7K
- industry payments (Sunshine Act)
- ≥34th
- pct by Part D claim volume (lower-bound band)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Federal trust snapshot
What official records show about Leonard Bielory, M.D.
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1154352987), first enumerated 07/06/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 104 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- Reported
Industry payment transparency
$3.7K in reported industry payments (17 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1154352987 · Clinical & Laboratory Immunology (Allergy & Immunology) Physician
NPI-10 · ENUM-LEGACY · TAX-TRACE · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1154352987
- ENUM-LEGACY 2006
- TAX-TRACE 97
- RX-LIGHT 104
- BOOK-THIN 2 in New Jersey
- PHOTO-ENUM Renata Engler · 2006
Leonard Bielory, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
104 ≥ 34th percentile 34% of 1,416,883 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
◑
Board-eligible specialty (heuristic, not verified)
Leonard Bielory, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Leonard Bielory, M.D.?
Quality data not reportedPrimary specialty
Clinical & Laboratory Immunology (Allergy & Immunology) Physician
Medicare Part D claims
104 87% vs specialty avg
Specialty distribution in New Jersey
How Clinical & Laboratory Immunology (Allergy & Immunology) Physician compares to other specialties among New Jersey providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Clinical & Laboratory Immunology (Allergy & Immunology) Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Practice Address
Provider Details
| NPI | 1154352987 |
|---|---|
| Specialty | Clinical & Laboratory Immunology (Allergy & Immunology) Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 07/06/2006 |
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Leonard Bielory, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$3.7K
Largest payer
Regeneron Pharmaceuticals, Inc.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Brand vs generic prescribing mix · Above average
Leonard Bielory, M.D. - brand share 39.0%
Clinical & Laboratory Immunology (Allergy & Immunology) Physician average
39% brand-name claims vs 61% generic, on 104 2024 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
104
Total Claims
$96K
Total Drug Cost
32
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 152.6
- Total Day Supply
- 3,955
- Brand vs Generic
- 39% brand / 61% generic
- Brand Drug Cost
- $73K
- Generic Drug Cost
- $23K
- Antibiotic Claims
- 11
Patient Demographics
- Average Patient Age
- 75.0 years
- Avg HCC Risk Score
- 1.34
- Gender Split
- 47% female / 53% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Nucala Mepolizumab | 13 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Clinical & Laboratory Immunology (Allergy & Immunology) Physician in NJ →
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Clinical & Laboratory Immunology (Allergy & Immunology) Physician Overview
How Leonard Bielory, M.D. fits within the Clinical & Laboratory Immunology (Allergy & Immunology) Physician landscape nationally.
97
Clinical & Laboratory Immunology (Allergy & Immunology) Physician Providers in US
29
States with Clinical & Laboratory Immunology (Allergy & Immunology) Physician
773
Avg Claims per Provider
Leonard Bielory, M.D.'s 104 claims are below the specialty average of 773.
Nationwide Clinical & Laboratory Immunology (Allergy & Immunology) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Bielory, both outside New Jersey so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Clinical & Laboratory Immunology (Allergy & Immunology) Physician Providers in New Jersey
Other clinicians with the same primary specialty enrolled in New Jersey, drawn from the same CMS NPPES roster as Bielory.
Frequently Asked Questions
What is Leonard Bielory, M.D.'s specialty? ▼
Leonard Bielory, M.D. specializes in Clinical & Laboratory Immunology (Allergy & Immunology) Physician and practices in Springfield, New Jersey. Credentials: M.D..
How much does Leonard Bielory, M.D. prescribe under Medicare Part D? ▼
In 2024, Leonard Bielory, M.D. wrote 104 Medicare Part D claims totaling $96K in drug costs for 32 beneficiaries.
Where is Leonard Bielory, M.D. located? ▼
Leonard Bielory, M.D. is located at 400 MOUNTAIN AVE, Springfield, NJ, 07081. Phone: (973) 912-9817.
What is Leonard Bielory, M.D.'s NPI number? ▼
Leonard Bielory, M.D.'s National Provider Identifier (NPI) is 1154352987, issued on 07/06/2006.
Does Leonard Bielory, M.D. prescribe more brand-name or generic drugs? ▼
Leonard Bielory, M.D.'s prescribing is 39% brand-name and 61% generic drugs by claim count, with $73K in brand drug costs.
How many Clinical & Laboratory Immunology (Allergy & Immunology) Physician providers are there in the US? ▼
There are 97 Clinical & Laboratory Immunology (Allergy & Immunology) Physician providers across 29 states in the US. The average Clinical & Laboratory Immunology (Allergy & Immunology) Physician provider writes 773 Medicare Part D claims per year.
What drugs does Leonard Bielory, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Leonard Bielory, M.D.'s most frequently prescribed drugs include Nucala. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Leonard Bielory, M.D. accept Medicare? ▼
Leonard Bielory, M.D. appears in CMS Medicare data with 104 Part D claims and 32 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Leonard Bielory, M.D.'s credentials? ▼
Leonard Bielory, M.D.'s NPI is 1154352987 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of August 2026 (NPPES) / 2024 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.