John Douglas Twenty, M.D.
Preventive Medicine/Occupational Environmental Medicine Physician · Indianapolis, IN
John Douglas Twenty, M.D. is a preventive medicine/occupational environmental medicine physician with a practice address in Indianapolis, Indiana, and NPI 1902946817, issued on Feb 8, 2007. Check the license (Indiana 01024985, as entered in NPPES) on the Medical Licensing Board of Indiana; the Medicare figures below come from public CMS files.
- Name
- John Douglas Twenty
- Credential
- M.D.
- Primary taxonomy
- Preventive Medicine/Occupational Environmental Medicine Physician 2083P0500X
- License number
- 01024985 IN
Self-reported in NPPES; status is on the state search - Practice location
- DC2111 Lilly Corporate Ctr, Indianapolis, IN 46285
- Phone
- (317) 276-7586
- Enumerated
- Feb 8, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (317) 276-1733
- Entity
- Type 1 · individual
8 nearest preventive medicine/occupational environmental medicine physician records → All 21 in Indiana → Look up another NPI →
Verify John Douglas Twenty in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Licensing Board of Indiana
Search for license 01024985Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average preventive medicine/occupational environmental medicine physician in 2024
14 Medicare Part D claims, against an average of 626 among the 189 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.
John Douglas Twenty among 21 preventive medicine/occupational environmental medicine physician records in Indiana
John Douglas Twenty, M.D. is one of 21 preventive medicine/occupational environmental medicine physician records with a practice address in Indiana. 43% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 19% of them.
- NPI issued2007 · 19% of these records are older, 38% newer
- In a Medicare fileYes · 43% of these records are
- In the CMS Doctors and Clinicians fileNo · 14% of these records are
- Record last updated2007 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2083P0500X and a Indiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Preventive Medicine/Occupational Environmental Medicine Physician providers in Indiana
There are 21 preventive medicine/occupational environmental medicine physician records in Indiana.
All 21 in Indiana → Every provider in Indianapolis → Preventive Medicine/Occupational Environmental Medicine Physician nationwide →
The 8 preventive medicine/occupational environmental medicine physician records with the nearest ZIP codes
- Herbert White, MDDyer, IN 463111578604567
- Francine Katz, DO, MPH, FACOEMMunster, IN 463211760652440
- Ted Niemiec, M.D.Munster, IN 463211003843665
- David Hazra, M.D., M.P.HIndianapolis, IN 462221861693277
- John Timothy, MDIndianapolis, IN 462201730213604
- Steven Whaley, M.D.Michigan City, IN 463601205971165
- Gregory Page, D.O., M.P.H.Indianapolis, IN 462021053516914
- Martial Knieser, M.D.Fishers, IN 460371083860563
Common questions
What is John Douglas Twenty, M.D.'s NPI number?
John Douglas Twenty, M.D.'s National Provider Identifier (NPI) is 1902946817, issued on Feb 8, 2007. An NPI identifies a provider in billing; it is not a license.
Where is John Douglas Twenty, M.D. located?
The NPPES record lists a practice address at DC2111 Lilly Corporate Ctr, Indianapolis, IN, 46285. Phone: (317) 276-7586. Providers update this record themselves, so call before visiting.
How can I verify John Douglas Twenty, M.D.'s license?
NPPES lists Indiana license number 01024985, 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 John Douglas Twenty, M.D. prescribe under Medicare Part D?
In 2024, John Douglas Twenty, M.D. had 14 Medicare Part D claims; the average among preventive medicine/occupational environmental medicine physician prescribers was 626. 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.