Leon Kao, MD
Allergy Physician · Germantown, MD
Leon Kao, MD is an allergy physician with a practice address in Germantown, Maryland, and NPI 1265639728, issued on Jun 28, 2007. Check the license (Maryland D0074337, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Leon Kao
- Credential
- MD
- Primary taxonomy
- Allergy Physician 207KA0200X
- License number
- D0074337 MD
Self-reported in NPPES; status is on the state search - Practice location
- 19851 Observation Dr Ste 375, Germantown, MD 20876
- Phone
- (301) 972-3709
- Enumerated
- Jun 28, 2007
- Record last updated
- Sep 5, 2022
- Fax
- (301) 515-3612
- Medicaid ID
- 1265639728 VA
- Medicare enrollment
- Enrolled (PECOS I20130524000283); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest allergy physician records → All 38 in Maryland → Look up another NPI →
Also registered at 19851 Observation Dr Ste 375
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Dilawar Khokhar, MDAllergy & Immunology (Internal Medicine) Physician1760836589
Verify Leon Kao in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0074337Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
30% fewer Medicare Part D claims than the average allergy physician in 2024
528 Medicare Part D claims for 92 beneficiaries, against an average of 750 among the 645 providers of this specialty who prescribed in Part D. Brand-name drugs were 38% of claims.
Most prescribed
- Albuterol Sulfate Hfa51 claims
- Fluticasone Propionate50 claims
- Montelukast Sodium46 claims
- Trelegy Ellipta40 claims
- Azelastine Hcl35 claims
- Xolair31 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $1,689.30
64 payments; by number, the most common kind was food and beverage; the largest payer was Regeneron Healthcare Solutions, Inc. The 502 providers of this specialty with any payment received $9,080.33 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Privia Medical Group, LLCLanham, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Leon Kao among 38 allergy physician records in Maryland
Leon Kao, MD is one of 38 allergy physician records with a practice address in Maryland. 66% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 71% of them.
- NPI issued2007 · 71% of these records are older, 13% newer
- In a Medicare fileYes · 66% of these records are
- In the CMS Doctors and Clinicians fileYes · 55% of these records are
- Graduated2001 · median 1991 among the 21 with a school on file
- Record last updated2022 · 76% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207KA0200X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy Physician providers in Maryland
There are 38 allergy physician records in Maryland.
All 38 in Maryland → Every provider in Germantown → Allergy Physician nationwide →
The 8 allergy physician records with the nearest ZIP codes
- Douglas Beakes, MDBethesda, MD 208891043203607
- David Schwartz, MDBethesda, MD 208891700812708
- Reuben Siraganian, M.D.Bethesda, MD 208921992948525
- Ana Saavedra-Delgado, M.D.Kensington, MD 208951346240058
- Heidi Isenberg-Feig, M.D.Rockville, MD 208521790783470
- Shabnam Foroughi, M.D.Rockville, MD 208501417086687
- Huamin Li, MD, PHDWheaton, MD 209021396733291
- Leo Shue, MDRockville, MD 208501477544344
Common questions
What is Leon Kao, MD's NPI number?
Leon Kao, MD's National Provider Identifier (NPI) is 1265639728, issued on Jun 28, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Leon Kao, MD located?
The NPPES record lists a practice address at 19851 Observation Dr Ste 375, Germantown, MD, 20876. Phone: (301) 972-3709. Providers update this record themselves, so call before visiting.
How can I verify Leon Kao, MD's license?
NPPES lists Maryland license number D0074337, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Leon Kao, MD prescribe under Medicare Part D?
In 2024, Leon Kao, MD had 528 Medicare Part D claims for 92 beneficiaries; the average among allergy physician prescribers was 750. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.