Ellen Ann Leng, M.D
Emergency Medicine Physician · Sun City, AZ
Ellen Ann Leng, M.D is an emergency medicine physician with a practice address in Sun City, Arizona, and NPI 1902855497, issued on May 10, 2006. Check the license on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Ellen Ann Leng
- Credential
- M.D
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A49694 CA
Self-reported in NPPES; status is on the state search - Practice location
- 10401 West Thunderbird Blvd., Sun City, AZ 85351
- Phone
- (623) 977-7211
- Enumerated
- May 10, 2006
- Record last updated
- Aug 14, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicaid ID
- 112972 AZ
- Medicare enrollment
- Enrolled (PECOS I20080611000875); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical School At San Antonio, 1990
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,494 in Arizona → Look up another NPI →
Also registered at 10401 West Thunderbird Blvd.
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gregory Greenbaum, M.DEmergency Medicine Physician1982654067
- Joel Gross, M.DEmergency Medicine Physician1790735876
- Scott Lopata, M.DEmergency Medicine Physician1356390843
Verify Ellen Ann Leng in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical BoardCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
75% fewer Medicare Part D claims than the average emergency medicine physician in 2024
56 Medicare Part D claims for 28 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Most prescribed
- Gentamicin Sulfate12 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 94.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 2 group practices
- Cep America - Auc PCWalnut Creek, CA
- Medamerica Physician Solutions PCWalnut Creek, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ellen Ann Leng among 1,494 emergency medicine physician records in Arizona
Ellen Ann Leng, M.D is one of 1,494 emergency medicine physician records with a practice address in Arizona. 79% 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 10% of them.
- NPI issued2006 · 10% of these records are older, 62% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 55% of these records are
- Graduated1990 · median 2014 among the 828 with a school on file
- Record last updated2018 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
22 emergency medicine physician records list a practice address in Sun City
They are 22 of the 813 NPPES records with a practice address in Sun City, and 1,494 emergency medicine physician records in Arizona.
All 1,494 in Arizona → Every provider in Sun City → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Robert Fitzgerald, M.DSun City, AZ 853511790735751
- Howard Friedman, M.DSun City, AZ 853511942259700
- Gregory Greenbaum, M.DSun City, AZ 853511982654067
- Joel Gross, M.DSun City, AZ 853511790735876
- Raymond Hemmert, D.OSun City, AZ 853511013946870
- Heidi Holland, D.OSun City, AZ 853511134179179
- Peter Hull, M.DSun City, AZ 853511255384640
- John Loewen, M.DSun City, AZ 853511760435960
Common questions
What is Ellen Ann Leng, M.D's NPI number?
Ellen Ann Leng, M.D's National Provider Identifier (NPI) is 1902855497, issued on May 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ellen Ann Leng, M.D located?
The NPPES record lists a practice address at 10401 West Thunderbird Blvd., Sun City, AZ, 85351. Phone: (623) 977-7211. Providers update this record themselves, so call before visiting.
How can I verify Ellen Ann Leng, M.D's license?
Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ellen Ann Leng, M.D prescribe under Medicare Part D?
In 2024, Ellen Ann Leng, M.D had 56 Medicare Part D claims for 28 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Ellen Ann Leng, M.D's MIPS final score?
The 2023 MIPS final score is 94.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.