Leon Samuel Greos, MD
Allergy & Immunology Physician · Centennial, CO
Leon Samuel Greos, MD is an allergy & immunology physician with a practice address in Centennial, Colorado, and NPI 1003887738, issued on Jan 31, 2006. Check the license (Colorado DR.0028923, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Leon Samuel Greos
- Credential
- MD
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- License number
- DR.0028923 CO
Self-reported in NPPES; status is on the state search - Practice location
- 13111 E Briarwood Ave Ste 340, Centennial, CO 80112
- Phone
- (303) 632-3694
- Enumerated
- Jan 31, 2006
- Record last updated
- May 4, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (303) 632-3692
- Medicaid ID
- 01289230 CO
- Entity
- Type 1 · individual
8 nearest allergy & immunology physician records → All 102 in Colorado → Look up another NPI →
Also registered at 13111 E Briarwood Ave Ste 340
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Claire Anderson, FNP-CFamily Nurse Practitioner1134010838
- Chad Lomas, M.D.Allergy & Immunology Physician1265771026
Verify Leon Samuel Greos in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license DR.0028923Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average allergy & immunology physician in 2024
23 Medicare Part D claims, against an average of 741 among the 2,899 providers of this specialty who prescribed in Part D.
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.
Leon Samuel Greos among 102 allergy & immunology physician records in Colorado
Leon Samuel Greos, MD is one of 102 allergy & immunology physician records with a practice address in Colorado. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 13% of them.
- NPI issued2006 · 13% of these records are older, 54% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileNo · 54% of these records are
- Record last updated2021 · 72% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207K00000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy & Immunology Physician providers in Colorado
There are 102 allergy & immunology physician records in Colorado.
All 102 in Colorado → Every provider in Centennial → Allergy & Immunology Physician nationwide →
The 8 allergy & immunology physician records with the nearest ZIP codes
- Chad Lomas, M.D.Centennial, CO 801121265771026
- Edan Sarid, M.D.Centennial, CO 801121700107208
- David Goodman, MDEnglewood, CO 801131487637997
- Raweewan Hoontrakoon, M.D.Greenwood Village, CO 801111851352249
- Patrick Tellez, MD, MPH, MSHAEnglewood, CO 801131184695967
- Ryan Lahood, MDCastle Rock, CO 801091033607742
- Joanne Vitanza, MDCentennial, CO 801221558382739
- Ryan Buckley, MDLittleton, CO 801231346628138
Common questions
What is Leon Samuel Greos, MD's NPI number?
Leon Samuel Greos, MD's National Provider Identifier (NPI) is 1003887738, issued on Jan 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Leon Samuel Greos, MD located?
The NPPES record lists a practice address at 13111 E Briarwood Ave Ste 340, Centennial, CO, 80112. Phone: (303) 632-3694. Providers update this record themselves, so call before visiting.
How can I verify Leon Samuel Greos, MD's license?
NPPES lists Colorado license number DR.0028923, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Leon Samuel Greos, MD prescribe under Medicare Part D?
In 2024, Leon Samuel Greos, MD had 23 Medicare Part D claims; the average among allergy & immunology physician prescribers was 741. 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.