James R. Siefer, DO
Urology Physician · Chandler, AZ
James R. Siefer, DO is a urology physician with a practice address in Chandler, Arizona, and NPI 1508846627, issued on Jan 17, 2006. Check the license (Arizona 1930, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- James R. Siefer
- Credential
- DO
- Primary taxonomy
- Urology Physician 208800000X
- License number
- 1930 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 485 S Dobson RD, Chandler, AZ 85224
- Phone
- (480) 963-2026
- Enumerated
- Jan 17, 2006
- Record last updated
- Jun 7, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (480) 963-5841
- Medicaid ID
- 921694 AZ
- Medicare enrollment
- Enrolled (PECOS I20050507000043); accepts Medicare assignment
- Medical or professional school
- Midwestern University, Chicago College Of Osteopathic Med, 1973
- Entity
- Type 1 · individual
8 nearest urology physician records → All 277 in Arizona → Look up another NPI →
Also registered at 485 S Dobson RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Yun Chen, FNP-CFamily Nurse Practitioner1154724235
- Alan Cook, M.D.Trauma Surgery Physician1447478292
- Jacqueline Fretto, FNPFamily Nurse Practitioner1275688418
Verify James R. Siefer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 1930Check 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 urology physician in 2024
932 Medicare Part D claims for 293 beneficiaries, against an average of 1,340 among the 10,782 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims.
Most prescribed
- Tamsulosin Hcl329 claims
- Finasteride176 claims
- Solifenacin Succinate38 claims
- Ciprofloxacin Hcl37 claims
- Bethanechol Chloride36 claims
- Oxybutynin Chloride Er35 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 MIPS final score for 2023 (Medicare payment program): 62.3 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $315.12
9 payments; by number, the most common kind was food and beverage; the largest payer was Astellas Pharma US Inc. The 9,340 providers of this specialty with any payment received $3,800.04 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
- Arizona State Urological Institute LLCSan Tan Valley, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
James R. Siefer among 277 urology physician records in Arizona
James R. Siefer, DO is one of 277 urology 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 18% of them.
- NPI issued2006 · 18% of these records are older, 50% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1973 · median 2003 among the 192 with a school on file
- Record last updated2012 · 43% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208800000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Urology Physician providers in Arizona
There are 277 urology physician records in Arizona.
All 277 in Arizona → Every provider in Chandler → Urology Physician nationwide →
The 8 urology physician records with the nearest ZIP codes
- Lauren Byrne, MDChandler, AZ 852241265588859
- Harrie Clyde, MDChandler, AZ 852241700853629
- Anthony Dyer, M.D.Chandler, AZ 852241457580425
- Marlou Heiland, M.D.Chandler, AZ 852241730180431
- Zachariah Taylor, DOChandler, AZ 852241083239206
- Paul Fieldstone, M.D.Casa Grande, AZ 852221093715666
- Mark Brenner, DOGilbert, AZ 852341750390456
- John Croushore, DOGilbert, AZ 852341740260124
Common questions
What is James R. Siefer, DO's NPI number?
James R. Siefer, DO's National Provider Identifier (NPI) is 1508846627, issued on Jan 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James R. Siefer, DO located?
The NPPES record lists a practice address at 485 S Dobson RD, Chandler, AZ, 85224. Phone: (480) 963-2026. Providers update this record themselves, so call before visiting.
How can I verify James R. Siefer, DO's license?
NPPES lists Arizona license number 1930, as entered by the provider. 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 James R. Siefer, DO prescribe under Medicare Part D?
In 2024, James R. Siefer, DO had 932 Medicare Part D claims for 293 beneficiaries; the average among urology physician prescribers was 1,340. Part D covers Medicare prescriptions only.
What is James R. Siefer, DO's MIPS final score?
The 2023 MIPS final score is 62.3 of 100. 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.