O'Rell Ronald Williams, MD
Internal Medicine Physician · Milwaukee, WI
O'Rell Ronald Williams, MD is an internal medicine physician with a practice address in Milwaukee, Wisconsin, and NPI 1972559755, issued on May 25, 2006. Check the license (Wisconsin 45383, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- O'Rell Ronald Williams
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 45383 WI
Self-reported in NPPES; status is on the state search - Practice location
- 5000 W Chambers St, Milwaukee, WI 53210
- Phone
- (414) 874-4316
- Enumerated
- May 25, 2006
- Record last updated
- Sep 16, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (414) 874-4160
- Medicare enrollment
- Enrolled (PECOS I20040921000930); accepts Medicare assignment
- Medical or professional school
- University Of Wisconsin School Of Medicine, 2001
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
Also registered at 5000 W Chambers St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Robert Arfman, MDAnesthesiology Physician1396789111
- Yasaman Ataei, MDStudent in an Organized Health Care Education/Training Program1437738630
Verify O'Rell Ronald Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 45383Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
46% more Medicare Part D claims than the average internal medicine physician in 2024
4,632 Medicare Part D claims for 429 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 113 claims were for opioids.
Most prescribed
- Atorvastatin Calcium212 claims
- Losartan Potassium193 claims
- Amlodipine Besylate192 claims
- Levothyroxine Sodium171 claims
- Lisinopril105 claims
- Furosemide103 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): 82.4 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: $1,329.66
76 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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 5 group practices
- Ascension Medical Group-Southeast Wisconsin IncBrookfield, WI
- CH Specialty Services WI SCHartford, WI
- Curana Health OF Wisconsin IncHartford, WI
- Fort Healthcare IncFort Atkinson, WI
- Zenith Healthcare SCKenosha, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
O'Rell Ronald Williams among 2,078 internal medicine physician records in Wisconsin
O'Rell Ronald Williams, MD is one of 2,078 internal medicine physician records with a practice address in Wisconsin. 70% 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 9% of them.
- NPI issued2006 · 9% of these records are older, 46% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2001 · median 2002 among the 1,098 with a school on file
- Record last updated2010 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
382 internal medicine physician records list a practice address in Milwaukee
They are 382 of the 18,389 NPPES records with a practice address in Milwaukee, and 2,078 internal medicine physician records in Wisconsin.
All 2,078 in Wisconsin → Every provider in Milwaukee → Internal Medicine Physician nationwide →
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Common questions
What is O'Rell Ronald Williams, MD's NPI number?
O'Rell Ronald Williams, MD's National Provider Identifier (NPI) is 1972559755, issued on May 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is O'Rell Ronald Williams, MD located?
The NPPES record lists a practice address at 5000 W Chambers St, Milwaukee, WI, 53210. Phone: (414) 874-4316. Providers update this record themselves, so call before visiting.
How can I verify O'Rell Ronald Williams, MD's license?
NPPES lists Wisconsin license number 45383, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does O'Rell Ronald Williams, MD prescribe under Medicare Part D?
In 2024, O'Rell Ronald Williams, MD had 4,632 Medicare Part D claims for 429 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is O'Rell Ronald Williams, MD's MIPS final score?
The 2023 MIPS final score is 82.4 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.