Steven Ater, DO
Obstetrics & Gynecology Physician · Phoenix, AZ
Steven Ater, DO is an obstetrics & gynecology physician with a practice address in Phoenix, Arizona, and NPI 1487238853, issued on May 11, 2021. Check the license (Arizona 012102, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Steven Ater
- Credential
- DO
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License numbers
- 012102 AZ
5151014831 MI
Self-reported in NPPES; status is on the state search - Practice location
- 1441 N 12TH St, Phoenix, AZ 85006
- Phone
- (602) 521-5700
- Enumerated
- May 11, 2021
- Record last updated
- Dec 23, 2025
- Medicare enrollment
- Enrolled (PECOS I20260216003214); accepts Medicare assignment
- Medical or professional school
- Arizona College Of Osteopathic Medicine Mid Western University, 2021
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 803 in Arizona → Look up another NPI →
Also registered at 1441 N 12TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Olivia Aranda, MSN-FNP-CFamily Nurse Practitioner1164151858
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- Don Beresini, MDDiagnostic Radiology Physician1386600757
Verify Steven Ater in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 012102Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
19 Medicare Part D claims, against an average of 165 among the 28,733 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.
One hospital affiliation
- Yuma Regional Medical CenterYuma, AZ · Acute Care Hospitals2 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.
Steven Ater among 803 obstetrics & gynecology physician records in Arizona
Steven Ater, DO is one of 803 obstetrics & gynecology physician records with a practice address in Arizona. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 93% of them.
- NPI issued2021 · 93% of these records are older, 4% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2021 · median 2005 among the 477 with a school on file
- Record last updated2025 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in Arizona
There are 803 obstetrics & gynecology physician records in Arizona.
All 803 in Arizona → Every provider in Phoenix → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Farshad Agahi, M.D.Phoenix, AZ 850061386886430
- Cara Christ, MDPhoenix, AZ 850061639369036
- Johnny Erkins, M.D.Phoenix, AZ 850061467593533
- Michael Hervey, M.D.Phoenix, AZ 850061922132414
- Paul Isaacson, M.D.Phoenix, AZ 850061659441202
- Heather Lesmes, MDPhoenix, AZ 850061881913945
- Monte Merrell, M.D.Phoenix, AZ 850061295900165
- Robert Rierson, MDPhoenix, AZ 850061053373100
Common questions
What is Steven Ater, DO's NPI number?
Steven Ater, DO's National Provider Identifier (NPI) is 1487238853, issued on May 11, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Steven Ater, DO located?
The NPPES record lists a practice address at 1441 N 12TH St, Phoenix, AZ, 85006. Phone: (602) 521-5700. Providers update this record themselves, so call before visiting.
How can I verify Steven Ater, DO's license?
NPPES lists Arizona license number 012102, 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 Steven Ater, DO prescribe under Medicare Part D?
In 2024, Steven Ater, DO had 19 Medicare Part D claims; the average among obstetrics & gynecology physician prescribers was 165. 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.