Michael J. Williamson, D.O.
Hematology & Oncology Physician · Richmond, IN
Michael J. Williamson, D.O. is a hematology & oncology physician with a practice address in Richmond, Indiana, and NPI 1366581209, issued on Feb 6, 2007. Check the license (Indiana 02002568A, as entered in NPPES) on the Medical Licensing Board of Indiana; the Medicare figures below come from public CMS files.
- Name
- Michael J. Williamson
- Credential
- D.O.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 02002568A IN
Self-reported in NPPES; status is on the state search - Practice location
- 1100 Reid Pkwy, Richmond, IN 47374
- Phone
- (765) 935-8773
- Enumerated
- Feb 6, 2007
- Record last updated
- May 19, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (765) 935-8774
- Medicaid ID
- 200469280 IN
- Medicare enrollment
- Enrolled (PECOS I20040811001131); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 245 in Indiana → Look up another NPI →
Also registered at 1100 Reid Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Asad Abbas, DOHospitalist Physician1750031092
- Simon Abdallah, MDInternal Medicine Physician1952798928
- Paula Abdelmalak, MDStudent in an Organized Health Care Education/Training Program1538001789
- Laura Adams, NP-CFamily Nurse Practitioner1598296873
- Cassandra AddingtonNurse Practitioner1356067094
- Augustine Ajuogu, MDInternal Medicine Physician1326544438
Verify Michael J. Williamson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Licensing Board of Indiana
Search for license 02002568ACheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% more Medicare Part D claims than the average hematology & oncology physician in 2024
1,655 Medicare Part D claims for 269 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims. 295 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen180 claims
- Eliquis160 claims
- Anastrozole146 claims
- Prochlorperazine Maleate73 claims
- Ondansetron Odt65 claims
- Exemestane60 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: $340.22
13 payments; by number, the most common kind was food and beverage; the largest payer was Astellas Pharma US Inc. The 8,560 providers of this specialty with any payment received $7,481.41 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
- Reid Physician Associates IncRichmond, IN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael J. Williamson among 245 hematology & oncology physician records in Indiana
Michael J. Williamson, D.O. is one of 245 hematology & oncology physician records with a practice address in Indiana. 82% 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 53% of them.
- NPI issued2007 · 53% of these records are older, 39% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2001 · median 2001 among the 177 with a school on file
- Record last updated2021 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Indiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in Indiana
There are 245 hematology & oncology physician records in Indiana.
All 245 in Indiana → Every provider in Richmond → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Jagadeesh Gaddipati, MDRichmond, IN 473741699728055
- Ryda Hendawi, MDRichmond, IN 473741134624034
- Sulfikar Ibrahim, M.D.Richmond, IN 473741568673952
- Danielle Doyle, MDBloomington, IN 474031508882390
- Jacqueline Joyce, M.D.Bloomington, IN 474031588647739
- David Joyce, MDBloomington, IN 474031588647440
- Karuna Koneru, M.D.Bloomington, IN 474031336146372
- Rajesh Shah, M.D.Bloomington, IN 474031487652152
Common questions
What is Michael J. Williamson, D.O.'s NPI number?
Michael J. Williamson, D.O.'s National Provider Identifier (NPI) is 1366581209, issued on Feb 6, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Michael J. Williamson, D.O. located?
The NPPES record lists a practice address at 1100 Reid Pkwy, Richmond, IN, 47374. Phone: (765) 935-8773. Providers update this record themselves, so call before visiting.
How can I verify Michael J. Williamson, D.O.'s license?
NPPES lists Indiana license number 02002568A, 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 Michael J. Williamson, D.O. prescribe under Medicare Part D?
In 2024, Michael J. Williamson, D.O. had 1,655 Medicare Part D claims for 269 beneficiaries; the average among hematology & oncology physician prescribers was 877. 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.