William Alter, D.O.
Obstetrics & Gynecology Physician · Middletown, OH
William Alter, D.O. is an obstetrics & gynecology physician with a practice address in Middletown, Ohio, and NPI 1669639779, issued on May 19, 2008. Check the license (Ohio 34.009883, as entered in NPPES) on the State Medical Board of Ohio; the Medicare figures below come from public CMS files.
- Name
- William Alter
- Credential
- D.O.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License numbers
- 34.009883 OH
58.002153 OH
Self-reported in NPPES; status is on the state search - Practice location
- 6147 State Route 122 Ste 110, Middletown, OH 45005
- Phone
- (513) 261-3500
- Enumerated
- May 19, 2008
- Record last updated
- Jan 27, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (513) 261-3509
- Medicaid ID
- 3071125 OH
- Medicare enrollment
- Enrolled (PECOS I20101008001135); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 1,572 in Ohio → Look up another NPI →
Also registered at 6147 State Route 122 Ste 110
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kristen Caldwell, D.O.Obstetrics & Gynecology Physician1114333531
- Mark Day, D.OObstetrics & Gynecology Physician1225050560
- Claire Healy, DOObstetrics & Gynecology Physician1932789583
Verify William Alter in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersState Medical Board of Ohio
Search for license 34.009883Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
7% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
153 Medicare Part D claims for 38 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Estradiol59 claims
- Oxybutynin Chloride Er23 claims
- Medroxyprogesterone Acetate18 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): 78.9 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).
Industry payments in 2024: $32.95
1 payment: food and beverage; the largest payer was Channel Medsystems, Inc. The 21,429 providers of this specialty with any payment received $1,030.61 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 2 group practices
- Dayton Osteopathic HospitalDayton, OH
- Kettering Independent Medical Group IncKettering, OH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Alter among 1,572 obstetrics & gynecology physician records in Ohio
William Alter, D.O. is one of 1,572 obstetrics & gynecology physician records with a practice address in Ohio. 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 2008, is newer than 61% of them.
- NPI issued2008 · 61% of these records are older, 35% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2006 · median 2004 among the 1,041 with a school on file
- Record last updated2021 · 58% 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 Ohio 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 Ohio
There are 1,572 obstetrics & gynecology physician records in Ohio.
All 1,572 in Ohio → Every provider in Middletown → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- William Andrew, MDFranklin, OH 450051760488761
- Casey Boyce, M.D.Franklin, OH 450051093847253
- Kristen Caldwell, D.O.Middletown, OH 450051114333531
- Mark Day, D.OMiddletown, OH 450051225050560
- Charles Hageman, MDFranklin, OH 450051790781862
- Claire Healy, DOMiddletown, OH 450051932789583
- Heather Hilkowitz, MDFranklin, OH 450051780684803
- Ronald Hirth, MDMiddletown, OH 450051942442322
Common questions
What is William Alter, D.O.'s NPI number?
William Alter, D.O.'s National Provider Identifier (NPI) is 1669639779, issued on May 19, 2008. An NPI identifies a provider in billing; it is not a license.
Where is William Alter, D.O. located?
The NPPES record lists a practice address at 6147 State Route 122 Ste 110, Middletown, OH, 45005. Phone: (513) 261-3500. Providers update this record themselves, so call before visiting.
How can I verify William Alter, D.O.'s license?
NPPES lists Ohio license number 34.009883, as entered by the provider. Search the State Medical Board of Ohio at https://elicense.ohio.gov/oh_verifylicense. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Alter, D.O. prescribe under Medicare Part D?
In 2024, William Alter, D.O. had 153 Medicare Part D claims for 38 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
What is William Alter, D.O.'s MIPS final score?
The 2023 MIPS final score is 78.9 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.