NPI registry status
Active
2026 NPPES data Allergy & Immunology Physician NPI 1770566820 M.D.
Verify on CMS → Joel Klein, M.D.
Allergy & Immunology Physician in Highland Park, Illinois.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 3,394 in 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
580
Medicare Part D claims · 93 beneficiaries · Allergy & Immunology Physician avg: 764
Generic prescribing
65%
generic claims · 35% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$588.75
18 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Joel Klein, M.D. filed 580 Medicare Part D claims in 2023 as a Allergy & Immunology Physician in Highland Park, Illinois, prescribing 65% generic.
- 580
- Part D claims, 2023
- 65%
- generic prescribing
- $588.75
- industry payments (Sunshine Act)
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.
Joel Klein, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
580 Top 34% higher than 66% of 1,370,886 prescribers
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.
Source CMS Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
Joel Klein, 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 Joel Klein, M.D.?
Quality data not reportedPrimary specialty
Allergy & Immunology Physician
Medicare Part D claims
580 24% vs specialty avg
Specialty distribution in Illinois
How Allergy & Immunology Physician compares to other specialties among Illinois 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 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).
Joel Klein, M.D. appears in the CMS NPPES registry as an Allergy & Immunology Physician provider holding M.D. credentials at 1160 PARK AVE W, Highland Park, IL, 60035, with a listed phone of (847) 432-0200. NPI 1770566820 was issued on 11/22/2005.
Medicare Part D records for calendar year 2023 show 580 prescription claims written by this provider, covering 93 Medicare beneficiaries and totaling roughly $171K in drug spend, split 35% brand-name and 65% generic by claim count.
Allergy & Immunology Physician is a narrow specialty nationwide, with 3,394 enrolled providers across 52 states and an average of 764 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1770566820 |
|---|---|
| Specialty | Allergy & Immunology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 11/22/2005 |
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 Joel Klein, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$589
Largest payer
AstraZeneca Pharmaceuticals LP
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.
License & disciplinary context - Illinois IDFPR 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~42K Illinois medical licensees in 2023 - they are NOT specific to Joel Klein, M.D.. To verify Joel Klein, M.D.'s current license status, search the IDFPR public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
106
Total board actions, Illinois 2023
Across 103 cases
2.52
Actions per 1,000 licensees
Illinois statewide rate
probation
Most common action type
38 cases
IDFPR publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Illinois disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Above average
Joel Klein, M.D. - brand share 35.0%
Allergy & Immunology Physician average
35% brand-name claims vs 65% generic, on 580 2023 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 2023.
580
Total Claims
$171K
Total Drug Cost
93
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,094
- Total Day Supply
- 30,045
- Brand vs Generic
- 35% brand / 65% generic
- Brand Drug Cost
- $151K
- Generic Drug Cost
- $20K
- Antibiotic Claims
- 48
Patient Demographics
- Average Patient Age
- 75.7 years
- Avg HCC Risk Score
- 1.10
- Gender Split
- 68% female / 32% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Joel Klein, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Montelukast Sodium
Montelukast Sodium
78 claims
- Prednisone
Prednisone
55 claims
- Ipratropium Bromide
Ipratropium Bromide
50 claims
- Azelastine Hcl 31
Azelastine Hcl
31 claims
- Breo Ellipta 28
Breo Ellipta
28 claims
- Albuterol Sulfate … 24
Albuterol Sulfate Hfa
24 claims
- Amoxicillin-Clavul… 23
Amoxicillin-Clavulanate Potass
23 claims
- Fluticasone Propio… 19
Fluticasone Propionate
19 claims
| Drug | Claims |
|---|---|
| Montelukast Sodium | 78 |
| Prednisone | 55 |
| Ipratropium Bromide | 50 |
| Azelastine Hcl | 31 |
| Breo Ellipta Fluticasone/Vilanterol | 28 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 24 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 23 |
| Fluticasone Propionate | 19 |
| Levocetirizine Dihydrochloride | 19 |
| Pulmicort Flexhaler Budesonide | 18 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Allergy & Immunology Physician Overview
How Joel Klein, M.D. fits within the Allergy & Immunology Physician landscape nationally.
3,394
Allergy & Immunology Physician Providers in US
52
States with Allergy & Immunology Physician
764
Avg Claims per Provider
Joel Klein, M.D.'s 580 claims are below the specialty average of 764.
Nearby Allergy & Immunology Physician Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Klein.
Dr. Daryn Abraham
M.D.
St Charles, IL
Dr. Justine Ade
MD
Urbana, IL
Dr. Miguel Alcordo
M.D.
Tinley Park, IL
Dr. Ingrid Alexander
MD
Springfield, IL
Dr. Hetal Amin
MD
Channahon, IL
Compare Allergy & Immunology Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Illinois medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Allergy & Immunology Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Joel Klein, M.D.'s specialty? ▼
Joel Klein, M.D. specializes in Allergy & Immunology Physician and practices in Highland Park, Illinois. Credentials: M.D..
How much does Joel Klein, M.D. prescribe under Medicare Part D? ▼
In 2023, Joel Klein, M.D. wrote 580 Medicare Part D claims totaling $171K in drug costs for 93 beneficiaries.
Where is Joel Klein, M.D. located? ▼
Joel Klein, M.D. is located at 1160 PARK AVE W, Highland Park, IL, 60035. Phone: (847) 432-0200.
What is Joel Klein, M.D.'s NPI number? ▼
Joel Klein, M.D.'s National Provider Identifier (NPI) is 1770566820, issued on 11/22/2005.
Does Joel Klein, M.D. prescribe more brand-name or generic drugs? ▼
Joel Klein, M.D.'s prescribing is 35% brand-name and 65% generic drugs by claim count, with $151K in brand drug costs.
How many Allergy & Immunology Physician providers are there in the US? ▼
There are 3,394 Allergy & Immunology Physician providers across 52 states in the US. The average Allergy & Immunology Physician provider writes 764 Medicare Part D claims per year.
What drugs does Joel Klein, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Joel Klein, M.D.'s most frequently prescribed drugs include Montelukast Sodium, Prednisone, Ipratropium Bromide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Joel Klein, M.D. accept Medicare? ▼
Joel Klein, M.D. appears in CMS Medicare data with 580 Part D claims and 93 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Joel Klein, M.D.'s credentials? ▼
Joel Klein, M.D.'s NPI is 1770566820 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 (2023). 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 April 2026 (NPPES) / 2023 (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
Compiled from official public sources by the PlainDoctor editorial team.
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 May 2026.