Xiu Ying Au
Endocrinology, Diabetes & Metabolism Physician · Billings, MT
Xiu Ying Au is an endocrinology, diabetes & metabolism physician with a practice address in Billings, Montana, and NPI 1659923712, issued on Jul 9, 2019. Check the license (Montana 130241, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Xiu Ying Au
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- 130241 MT
Self-reported in NPPES; status is on the state search - Practice location
- 1045 N 30TH St, Billings, MT 59101
- Phone
- (406) 238-2500
- Enumerated
- Jul 9, 2019
- Record last updated
- Jun 20, 2024
- Medicare enrollment
- Enrolled (PECOS I20240626000484); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 1045 N 30TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gabriel Blomquist, P.A.Medical Physician Assistant1659772176
- Christa Boggis-Delacruz, MDObstetrics & Gynecology Physician1215642665
- Reed Christensen, M.D.Endocrinology, Diabetes & Metabolism Physician1902882673
- Brenda FlahertyStudent in an Organized Health Care Education/Training Program1942657762
- Landon Horst, RDRegistered Dietitian1124795562
- David Johnson, MDEndocrinology, Diabetes & Metabolism Physician1972544617
Verify Xiu Ying Au in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license 130241Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
393 Medicare Part D claims for 113 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 47% of claims.
Most prescribed
- Levothyroxine Sodium62 claims
- Hydrocortisone35 claims
- Jardiance23 claims
- Mounjaro22 claims
- Rosuvastatin Calcium20 claims
- Methimazole17 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: $103.68
4 payments; by number, the most common kind was food and beverage; the largest payer was Takeda Pharmaceuticals U.S.A., Inc. The 5,661 providers of this specialty with any payment received $5,742.15 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.
One hospital affiliation
- Billings ClinicBillings, MT · Acute Care Hospitals4 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Endocrinology, Diabetes & Metabolism Physician providers in Montana
There are 23 endocrinology, diabetes & metabolism physician records in Montana.
Other endocrinology, diabetes & metabolism physician records in Montana
- Samah Abu Omar, MDBozeman, MT1558984724
- Rino Buzzola, M.D.Missoula, MT1730451287
- Reed Christensen, M.D.Billings, MT1902882673
- Barry Cohan, M.D.Great Falls, MT1477646750
- Christopher Corsi, MDMissoula, MT1174577589
- Michele Danicich, MDMissoula, MT1053321273
- Jose De Souza, MDKalispell, MT1275534158
- Marlys Drange, MD,PHDHelena, MT1891787479
- Nancy Eyler, MDMissoula, MT1235149451
- Mary Irene Feria, M.D.Kalispell, MT1447244454
Common questions
What is Xiu Ying Au's NPI number?
Xiu Ying Au's National Provider Identifier (NPI) is 1659923712, issued on Jul 9, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Xiu Ying Au located?
The NPPES record lists a practice address at 1045 N 30TH St, Billings, MT, 59101. Phone: (406) 238-2500. Providers update this record themselves, so call before visiting.
How can I verify Xiu Ying Au's license?
NPPES lists Montana license number 130241, as entered by the provider. Search the Montana Board of Medical Examiners at https://ebiz.mt.gov/POL/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Xiu Ying Au prescribe under Medicare Part D?
In 2024, Xiu Ying Au had 393 Medicare Part D claims for 113 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.