Anti-Allergic AgentsAntibodies, MonoclonalAntibodies, Monoclonal, Humanized
Dr. Jeffrey G. Leflein, MD
NPI1578544870PAC ID9739148255
- Medicare services, 2024
- 1,890
- Medicare patients, 2024
- 171
- Part D claims, 2024
- 1,220
- Publications
- 2
- Clinical trials
- 7
- Practice address
- 4350 Jackson Rd, Ann Arbor, MI 48103
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Allergy and Immunology Associates of Ann Arbor PC - HOPD
Acute Care Hospital outpatient department · Ann Arbor, Michigan
Find Dr. Leflein's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Jeffrey G. Leflein is an allergist and immunologist in Ann Arbor, Michigan
Dr. Leflein practices at Allergy and Immunology Associates of Ann Arbor PC - HOPD in Ann Arbor, Michigan.
Dr. Leflein's NPI, 1578544870, was assigned on November 14, 2005. Dr. Leflein holds Michigan license 4301057172.
NPI and contact details
- NPI
- 1578544870NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9739148255
- NPI enumeration date
- November 14, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Jeffrey G. Leflein practices at Allergy and Immunology Associates of Ann Arbor PC - HOPD in Ann Arbor, Michigan
Dr. Leflein's primary practice is Allergy and Immunology Associates of Ann Arbor PC - HOPD, at 4350 Jackson Rd, Ann Arbor, MI 48103.
- Allergy and Immunology Associates of Ann Arbor PC - HOPD4350 Jackson Rd, Ann Arbor, MI 48103
Source: Dmand AI Affiliation Data
Dr. Jeffrey G. Leflein is affiliated with 4 sites of care and 1 medical group
Dr. Leflein's primary practice is Allergy and Immunology Associates of Ann Arbor PC - HOPD in Ann Arbor, Michigan. Dr. Leflein is also affiliated with Trinity Health Ann Arbor Hospital. The medical group on file is Allergy & Immunology Associates of Michigan. Dmand AI also links Dr. Leflein to 1 more hospital and 1 group practice or clinic, each named with a free account. Dr. Leflein's employer is on file too: a hospital.
Allergy and Immunology Associates of Ann Arbor PC - HOPDPrimary
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Jeffrey G. Leflein's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Leflein practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Allergy and Immunology Associates of Ann Arbor PC - HOPD | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every site where Dr. Leflein practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Jeffrey G. Leflein is one of 118 allergists and immunologists in Michigan
Allergy and immunology is Dr. Leflein's primary specialty in the NPI Registry, under taxonomy code 207K00000X. Dr. Leflein is licensed in Michigan.
Specialties and state licenses
- Allergy and immunology, MichiganPrimary
Allergists and immunologists near Dr. Leflein
Counts of allergists and immunologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Jeffrey G. Leflein billed Medicare for 1,890 services in 2024
CMS data shows 1,890 Medicare services from Dr. Leflein across 11 procedure codes in 2024, for 171 Medicare patients. Medicare paid $22,155 for them. Every service was in an office.
Medicare services, 20241,890
Medicare patients171
Paid by Medicare$22,155
Procedure codes11
Dr. Leflein's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 1,7722024: 1,7223%
- Office and hospital visits
- 2023: 1832024: 1688%
Dr. Leflein compared with the Michigan median for allergists and immunologists, 2024
- Dr. Leflein
- Michigan median
- Medicare services
- 1,890vs 1,00688% above
- Medicare patients
- 171vs 10464% above
- Part D claims
- 1,114vs 3842.9 times
Medians across 120 allergists and immunologists in Michigan with Dmand AI profiles that report each measure.
Dr. Leflein's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Leflein?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Leflein and other allergists and immunologists in Michigan.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Jeffrey G. Leflein treated 171 Medicare patients in 2024, average age 72
CMS counts 171 Medicare patients who saw Dr. Leflein in 2024. The largest group is 65 to 74, with 97 patients. 70% of them have high cholesterol, and 62% have high blood pressure. Their average risk score is 0.96, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Leflein's median patient age at 44, with 59% women.
Medicare patients, 2024171
Average age72
Average risk score0.96
Dr. Leflein's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Leflein's Medicare patients by sex, 2024
- Women11668%
- Men5532%
Chronic conditions among Dr. Leflein's Medicare patients, 2024
- High cholesterol70%
- High blood pressure62%
- Asthma46%
- Arthritis43%
- Anxiety27%
- Diabetes22%
- Mood disorders22%
- Osteoporosis22%
Share of Medicare patients with each condition. A patient can have several.
Dr. Leflein's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 44
Patient panel by sex, all payers
- Women59%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Jeffrey G. Leflein wrote 1,220 Medicare Part D claims in 2024
In 2024, Dr. Leflein wrote 1,220 Medicare Part D claims for 261 patients. 64% of them were for generic drugs. CMS names the drug for 1,114 of them, across 21 drugs with 11 or more claims each, at $764,615 in total drug cost. In 2023, CMS named 1,080 claims across 22 drugs.
Part D claims, 20241,220
Drugs named by CMS21
Total drug cost$764,615
Part D patients261
Dr. Leflein's Part D claims by kind of drug, 2024
- Generic779 claims64%
- Brand-name441 claims36%
Dr. Leflein's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Leflein's Part D claims, 2024
- Antibiotics3%40 of 1,220 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,0802024: 1,1143%
Drugs named by CMS: 21 in 2024, 22 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Jeffrey G. Leflein takes part in Medicare
Dr. Leflein accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
Find allergists and immunologists like Dr. Leflein by procedure volume and prescribing
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Jeffrey G. Leflein has 2 publications on record
Dmand AI links 2 papers to Dr. Leflein, published from 2023 to 2024. The most frequent topics are Anti-Allergic Agents and Antibodies, Monoclonal, Humanized. Dr. Leflein's most frequent co-authors are Jonathan A. Bernstein, MD, Shaila U. Gogate, MD and Jennifer Maloney, MD.
Papers2
Years published2023 to 2024
Topics Dr. Leflein writes about most
- Anti-Allergic Agents
- Antibodies, Monoclonal, Humanized
Dr. Leflein's most frequent co-authors
- Jonathan A. Bernstein, MD1 shared paper
- Shaila U. Gogate, MD1 shared paper
- Jennifer Maloney, MD1 shared paper
Recent publications by Dr. Leflein
Anti-Allergic AgentsAntibodies, Monoclonal, HumanizedChronic Urticaria
See who Dr. Leflein researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Leflein works with, so you can find a warm path to the right allergists and immunologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Jeffrey G. Leflein has worked on 7 clinical trials
Dmand AI links Dr. Leflein to 7 clinical trials, 2 of them phase 3 studies. 2 are still active or recruiting. Conditions studied include Asthma, Dermatitis, Atopic and Respiratory Hypersensitivity. GlaxoSmithKline sponsors the most, 3. Open Payments lists research payments to Dr. Leflein that name 4 trials.
Clinical trials with Dr. Leflein by phase
- NonePhase 1: no trials
- NonePhase 2: no trials
- 2Phase 3: 2 trials
- 1Phase 4: 1 trial
Conditions in Dr. Leflein's trials
- Asthma
- Dermatitis, Atopic
- Respiratory Hypersensitivity
- Eczema
- Peanut Hypersensitivity
Investigators on the most trials with Dr. Leflein
- Edward M. Kerwin, MD3 shared trials
- Ricardo Antonio Tan, MD3 shared trials
- Armando Enrique Acevedo, MD2 shared trials
Recent clinical trials with Dr. Leflein
AsthmaRespiratory HypersensitivityGSK3511294
AsthmaRespiratory HypersensitivityFluticasone furoateMontelukastShort Acting Beta 2 Agonist
AsthmaRespiratory HypersensitivityFF via ELLIPTA DPIFF/VI via ELLIPTA DPI
A Study to Assess the Long-Term Safety and Efficacy of Lebrikizumab (LY3650150) in Participants 6 Months to <18 Years of Age With Moderate-to-Severe Atopic Dermatitis (opens in a new tab)
Enrolling by invitation
$402 in research paymentsEczemaDermatitis, AtopicLebrikizumab
$2,406 in research paymentsDermatitis, AtopicSkin Diseases, EczematousDelgocitinib
Sources: Open Payments (CMS), 2025 data, released July 7, 2026; Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Jeffrey G. Leflein received $19,646 in industry payments from 2016 to 2025
CMS Open Payments shows 99 general payments to Dr. Leflein from 21 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 44% of the total. Novartis Pharmaceuticals Corporation paid the most, $10,367. It also lists 41 research payments totaling $236,736 from 2016 to 2023, naming 4 clinical trials.
General payments to Dr. Leflein by program year, 2016 to 2025
General payments to Dr. Leflein by kind, 2016 to 2025
$19.6Kin total
- Consulting fees$8,71044%
- Speaker and faculty fees$5,40027%
- Travel and lodging$3,13016%
- Food and beverage$2,37112%
- Education$360%
Companies that paid Dr. Leflein the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Jeffrey G. Leflein's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Jeffrey G. Leflein
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Jeffrey G. Leflein's NPI number?
Dr. Jeffrey G. Leflein's NPI number is 1578544870. It was assigned on November 14, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Jeffrey G. Leflein?
Dr. Jeffrey G. Leflein is an allergist and immunologist in Ann Arbor, Michigan. The primary specialty in the NPI Registry is Allergy & Immunology Physician (taxonomy code 207K00000X).
Where does Dr. Jeffrey G. Leflein practice?
Dr. Leflein practices at 4350 Jackson Rd, Ann Arbor, MI 48103. Dr. Leflein's primary practice is Allergy and Immunology Associates of Ann Arbor PC - HOPD in Ann Arbor, Michigan. Dmand AI also links Dr. Leflein to 1 hospital and 1 group practice or clinic.
What is Dr. Jeffrey G. Leflein's medical license number?
Dr. Leflein holds Michigan license 4301057172.
Which hospitals is Dr. Jeffrey G. Leflein affiliated with?
Dr. Leflein is affiliated with Trinity Health Ann Arbor Hospital. Dmand AI links Dr. Leflein to 1 more hospital.
What medical group is Dr. Jeffrey G. Leflein part of?
Dr. Leflein is linked to Allergy & Immunology Associates of Michigan.
Does Dr. Jeffrey G. Leflein accept Medicare?
Yes. CMS data shows Dr. Leflein billed Medicare for 1,890 services in 2024, and Dr. Leflein accepts Medicare assignment.
How many Medicare patients does Dr. Jeffrey G. Leflein see?
CMS counts 171 Medicare patients who saw Dr. Leflein in 2024, with an average age of 72.
What services does Dr. Jeffrey G. Leflein bill to Medicare?
In 2024, Dr. Leflein's most billed Medicare services were allergy test or treatment (95004), allergy test or treatment (95165) and allergy test or treatment (95117).
What drugs does Dr. Jeffrey G. Leflein prescribe most?
In 2024 Medicare Part D data, Dr. Leflein's most prescribed drugs by claims were Montelukast Sodium, Albuterol Sulfate Hfa and Fluticasone-Salmeterol.
Show 4 more questionsShow fewer questions
Has Dr. Jeffrey G. Leflein received payments from drug or device companies?
CMS Open Payments shows $19,646 in general payments to Dr. Leflein from 21 companies from 2016 to 2025. The largest total came from Novartis Pharmaceuticals Corporation.
How long has Dr. Jeffrey G. Leflein been practicing?
Dr. Leflein graduated from medical school in 1987, 39 years ago.
Does Dr. Jeffrey G. Leflein do research?
Dmand AI links 2 publications to Dr. Leflein, published from 2023 to 2024. Dr. Leflein has worked on 7 clinical trials.
Who does Dr. Jeffrey G. Leflein publish with?
Dr. Leflein's most frequent co-authors are Jonathan A. Bernstein, MD (1 shared paper), Shaila U. Gogate, MD (1 shared paper) and Jennifer Maloney, MD (1 shared paper).
Selling to allergy and immunology practices?
See allergists and immunologists in Michigan by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card