Ann Allergy Asthma Immunol
Dr. Leon W. Kao, MD
- Medicare services, 2024
- 1,298
- Medicare patients, 2024
- 126
- Part D claims, 2024
- 528
- Publications
- 4
- Industry payments
- $9,221
- Practice address
- 19851 Observation Drive, Suite 445, Germantown, MD 20876
- Practice phone
- Call (301) 309-8219
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Summit Ambulatory Surgery Center - Germantown
Surgery Center - Medicare-Certified · Germantown, Maryland
Find Dr. Kao'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. Leon W. Kao is an allergy physician in Germantown, Maryland
Dr. Kao practices at Summit Ambulatory Surgery Center - Germantown in Germantown, Maryland.
Dr. Kao's NPI, 1265639728, was assigned on June 28, 2007. Dr. Kao graduated from VCU School of Medicine in 2006. Dr. Kao holds Maryland license D0074337.
- NPI
- 1265639728NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6709939358
- NPI enumeration date
- June 28, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (301) 309-8219
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 51
- Medical school graduation
- 2006
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Leon W. Kao practices at Summit Ambulatory Surgery Center - Germantown in Germantown, Maryland
Dr. Kao's primary practice is Summit Ambulatory Surgery Center - Germantown, at 19851 Observation Drive, Suite 445, Germantown, MD 20876. The practice phone is (301) 309-8219.
- Summit Ambulatory Surgery Center - Germantown19851 Observation Drive, Suite 445, Germantown, MD 20876Phone(301) 309-8219
Source: Dmand AI Affiliation Data
Dr. Leon W. Kao is affiliated with 4 sites of care and 3 medical groups
Dr. Kao's primary practice is Summit Ambulatory Surgery Center - Germantown in Germantown, Maryland. The medical group on file is Privia Medical Group. Dmand AI also links Dr. Kao to 3 more group practices and clinics and 2 medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Leon W. Kao's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kao practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Summit Ambulatory Surgery Center - Germantown | Available with a free account |
| +3 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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. Leon W. Kao is one of 34 allergy physicians in Maryland
Allergy is Dr. Kao's primary specialty in the NPI Registry, under taxonomy code 207KA0200X. Dr. Kao is board certified in allergy & immunology by the American Board of Allergy and Immunology. Dmand AI has Dr. Kao's licenses on file in 2 states: Maryland and Virginia.
Specialties and state licenses
- Allergy, MarylandPrimary
- Virginia license
Clinical focus
Dmand AI lists acute sinusitis, asthma, chronic nasal allergies and hives among the conditions Dr. Kao treats.
Allergy physicians near Dr. Kao
Counts of allergy physicians 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. Leon W. Kao billed Medicare for 1,298 services in 2024
CMS data shows 1,298 Medicare services from Dr. Kao across 7 procedure codes in 2024, for 126 Medicare patients. Medicare paid $24,613 for them. Every service was in an office.
Dr. Kao's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 1,3192024: 1,10616%
- Office and hospital visits
- 2023: 1652024: 19216%
Dr. Kao compared with the Maryland median for allergy physicians, 2024
- Dr. Kao
- Maryland median
- Medicare services
- 1,298vs 1,83629% below
- Medicare patients
- 126vs 15117% below
- Part D claims
- 438vs 1822.4 times
Medians across 26 allergy physicians in Maryland with Dmand AI profiles that report each measure.
Dr. Kao'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. Kao?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Kao and other allergy physicians in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Leon W. Kao treated 126 Medicare patients in 2024, average age 71
CMS counts 126 Medicare patients who saw Dr. Kao in 2024. The largest group is 65 to 74, with 70 patients. 75% of them have high cholesterol, and 63% have high blood pressure. 12% are also on Medicaid. Their average risk score is 0.89, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Kao's median patient age at 31, with 59% women.
Dr. Kao's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Kao's Medicare patients by sex, 2024
- Women8668%
- Men4032%
Chronic conditions among Dr. Kao's Medicare patients, 2024
- High cholesterol75%
- High blood pressure63%
- Arthritis52%
- Asthma40%
- Mood disorders32%
- Anxiety30%
- Depression28%
- Ischemic heart disease28%
Share of Medicare patients with each condition. A patient can have several.
Dr. Kao's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 31
Patient panel by sex, all payers
- Women59%
- Men40%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Leon W. Kao wrote 528 Medicare Part D claims in 2024
In 2024, Dr. Kao wrote 528 Medicare Part D claims for 92 patients. 62% of them were for generic drugs. CMS names the drug for 438 of them, across 17 drugs with 11 or more claims each, at $162,378 in total drug cost. In 2023, CMS named 253 claims across 11 drugs.
Dr. Kao's Part D claims by kind of drug, 2024
- Generic329 claims62%
- Brand-name199 claims38%
Dr. Kao'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. Kao's Part D claims, 2024
- Antibiotics3%18 of 528 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: 2532024: 43873%
Drugs named by CMS: 17 in 2024, 11 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
Dr. Leon W. Kao offers telehealth to Medicare patients
Dr. Kao accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Kao as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Leon W. Kao has 4 publications on record
Dmand AI links 4 papers to Dr. Kao, published from 2012 to 2013. 2013 was the busiest year, with 3. Dr. Kao has published most often in Ann Allergy Asthma Immunol. Dr. Kao's most frequent co-authors are John Andrew Bird, MD, Vineeta Mittal, MD and Michael Louis Alvares, MD.
Dr. Kao's most frequent co-authors
- John Andrew Bird, MD2 shared papers
- Vineeta Mittal, MD2 shared papers
- Michael Louis Alvares, MD1 shared paper
Recent publications by Dr. Kao
Pediatrics
Ann Allergy Asthma Immunol
See who Dr. Kao researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Kao works with, so you can find a warm path to the right allergy physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Leon W. Kao received $9,221 in industry payments from 2016 to 2025
CMS Open Payments shows 426 general payments to Dr. Kao from 39 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. AstraZeneca Pharmaceuticals LP paid the most, $1,516.
General payments to Dr. Kao by program year, 2016 to 2025
General payments to Dr. Kao by kind, 2016 to 2025
- Food and beverage$9,16799%
- Education$310%
- Consulting fees$230%
Companies that paid Dr. Kao the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Leon W. Kao has 1 award and honors on record
Dmand AI lists 1 award for Dr. Kao, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Kao
- 2013
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. Leon W. Kao graduated from VCU School of Medicine
Dr. Kao graduated from VCU School of Medicine in 2006. Dr. Kao is a member of AOA and AAAAI.
- Medical school
- Board certified in allergy & immunology
Source: Dmand AI Professional Profile Data
Dr. Leon W. Kao accepts plans from 17 insurance carriers
Dr. Kao is in network with 17 carriers, including Aetna, Elevance and United Healthcare. PPO plans come from the most carriers, 11. Check the plan with the practice before a visit.
- Aetna
- Elevance
- United Healthcare
- Cigna
- HCSC
- Aspirus Health Plan
- Blue Cross Blue Shield of Massachusetts
- Blue Cross Blue Shield of Michigan
- +9 more carriersWith a free account
Plan types Dr. Kao accepts, by number of carriers
- PPO11
- Medicare10
- HMO8
- EPO4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. Leon W. Kao'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 DataDmand AI Org Hierarchy 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 |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| 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. Leon W. Kao
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. Leon W. Kao's NPI number?
Dr. Leon W. Kao's NPI number is 1265639728. It was assigned on June 28, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Leon W. Kao?
Dr. Leon W. Kao is an allergy physician in Germantown, Maryland. The primary specialty in the NPI Registry is Allergy Physician (taxonomy code 207KA0200X).
Where does Dr. Leon W. Kao practice?
Dr. Kao practices at 19851 Observation Drive, Suite 445, Germantown, MD 20876. Dr. Kao's primary practice is Summit Ambulatory Surgery Center - Germantown in Germantown, Maryland. Dmand AI also links Dr. Kao to 3 group practices and clinics and 2 medical groups.
What is Dr. Leon W. Kao's office phone number?
The practice phone on file for Dr. Kao is (301) 309-8219.
What is Dr. Leon W. Kao's medical license number?
Dr. Kao holds Maryland license D0074337, one of the licenses on file in 2 states.
Which states has Dr. Leon W. Kao been licensed in?
Dmand AI has state licenses on file for Dr. Kao in Maryland (2012 to 2026) and Virginia (2007 to 2010).
What medical group is Dr. Leon W. Kao part of?
Dr. Kao is linked to Privia Medical Group. Dmand AI links Dr. Kao to 2 more medical groups.
Does Dr. Leon W. Kao accept Medicare?
Yes. CMS data shows Dr. Kao billed Medicare for 1,298 services in 2024, and Dr. Kao accepts Medicare assignment.
Does Dr. Leon W. Kao offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Kao as offering telehealth services.
How many Medicare patients does Dr. Leon W. Kao see?
CMS counts 126 Medicare patients who saw Dr. Kao in 2024, with an average age of 71.
Show 9 more questionsShow fewer questions
Is Dr. Leon W. Kao board certified?
Yes. Dr. Kao is board certified in allergy & immunology by the American Board of Allergy and Immunology.
What services does Dr. Leon W. Kao bill to Medicare?
In 2024, Dr. Kao's most billed Medicare services were allergy test or treatment (95004), office visit, established patient (99214) and office visit, new patient (99204).
Where did Dr. Leon W. Kao go to medical school?
Dr. Kao graduated from VCU School of Medicine in 2006.
What drugs does Dr. Leon W. Kao prescribe most?
In 2024 Medicare Part D data, Dr. Kao's most prescribed drugs by claims were Albuterol Sulfate Hfa, Fluticasone Propionate and Montelukast Sodium.
Has Dr. Leon W. Kao received payments from drug or device companies?
CMS Open Payments shows $9,221 in general payments to Dr. Kao from 39 companies from 2016 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. Leon W. Kao been practicing?
Dr. Kao graduated from medical school in 2006, 20 years ago.
Does Dr. Leon W. Kao do research?
Dmand AI links 4 publications to Dr. Kao, published from 2012 to 2013.
Who does Dr. Leon W. Kao publish with?
Dr. Kao's most frequent co-authors are John Andrew Bird, MD (2 shared papers), Vineeta Mittal, MD (2 shared papers) and Michael Louis Alvares, MD (1 shared paper).
What insurance does Dr. Leon W. Kao accept?
Dr. Kao is in network with 17 carriers, including Aetna, Elevance and United Healthcare. PPO plans come from the most carriers, 11. Check the plan with the practice before a visit.
Selling to allergy practices?
See allergy physicians in Maryland 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