Barbara Diakos, MD
Obstetrics & Gynecology Physician · Saint John, IN
Barbara Diakos, MD is an obstetrics & gynecology physician with a practice address in Saint John, Indiana, and NPI 1912934423, issued on Jun 28, 2006. Check the license (Indiana 01082757A, as entered in NPPES) on the Medical Licensing Board of Indiana; the Medicare figures below come from public CMS files.
- Name
- Barbara Diakos
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 01082757A IN
Self-reported in NPPES; status is on the state search - Practice location
- 9660 Wicker Ave, Saint John, IN 46373
- Phone
- (219) 226-2236
- Enumerated
- Jun 28, 2006
- Record last updated
- Jun 7, 2024
- Medicaid IDs
- 300010757 IN
036086553 IL - Medicare enrollment
- Enrolled (PECOS I20190822001371); accepts Medicare assignment
- Medical or professional school
- Loyola University Of Chicago, Stritch School Of Medicine, 1990
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 894 in Indiana → Look up another NPI →
Also registered at 9660 Wicker Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Robert Chen, MDInternal Medicine Physician1255335816
- Irene Dmitruk, DOEmergency Medicine Physician1861703399
- Alicia Fowler, NP-CFamily Nurse Practitioner1093284838
- Diana GiordanoFamily Nurse Practitioner1477113181
- Ganapathi Gottumukkala, M.D.Family Medicine Physician1780683953
- Nadim Hafez, MDEmergency Medicine Physician1518164284
Verify Barbara Diakos in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Licensing Board of Indiana
Search for license 01082757ACheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
61% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
65 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 28% of claims.
Most prescribed
- Misoprostol22 claims
- Estradiol21 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: $206.99
14 payments; by number, the most common kind was food and beverage; the largest payer was Organon Llc. 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 one group practice
- 219 Health Network IncSaint John, IN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Barbara Diakos among 894 obstetrics & gynecology physician records in Indiana
Barbara Diakos, MD is one of 894 obstetrics & gynecology physician records with a practice address in Indiana. 76% 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 20% of them.
- NPI issued2006 · 20% of these records are older, 45% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1990 · median 2004 among the 591 with a school on file
- Record last updated2024 · 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 207V00000X and a Indiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
3 obstetrics & gynecology physician records list a practice address in Saint John
They are 3 of the 158 NPPES records with a practice address in Saint John, and 894 obstetrics & gynecology physician records in Indiana.
All 894 in Indiana → Every provider in Saint John → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Nicole Cataldi, D.O.Saint John, IN 463731013168343
- Rose Diakos, MDSaint John, IN 463731699701342
- Ayesha Hasan, DOSchererville, IN 463751861072084
- Howard Marcus, MDSchererville, IN 463751972585842
- Isabelle Michaela Nievera, MDSchererville, IN 463751528636537
- Megan App, M.D.Portage, IN 463681154334167
- Travis Haldeman, D.O.Portage, IN 463681033162425
- Dana Jones, MDPortage, IN 463681013447853
Common questions
What is Barbara Diakos, MD's NPI number?
Barbara Diakos, MD's National Provider Identifier (NPI) is 1912934423, issued on Jun 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Barbara Diakos, MD located?
The NPPES record lists a practice address at 9660 Wicker Ave, Saint John, IN, 46373. Phone: (219) 226-2236. Providers update this record themselves, so call before visiting.
How can I verify Barbara Diakos, MD's license?
NPPES lists Indiana license number 01082757A, as entered by the provider. Search the Medical Licensing Board of Indiana at https://www.in.gov/pla/professions/physicians-home/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Barbara Diakos, MD prescribe under Medicare Part D?
In 2024, Barbara Diakos, MD had 65 Medicare Part D claims for 38 beneficiaries; 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.