William Rittmeyer, DO
Interventional Pain Medicine Physician · Libertyville, IL
William Rittmeyer, DO is an interventional pain medicine physician with a practice address in Libertyville, Illinois, and NPI 1770088189, issued on Mar 27, 2018. Check the license (Illinois 036.158666, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- William Rittmeyer
- Credential
- DO
- Primary taxonomy
- Interventional Pain Medicine Physician 208VP0014X
- License number
- 036.158666 IL
Self-reported in NPPES; status is on the state search - Practice location
- 890 Garfield Ave Ste 103, Libertyville, IL 60048
- Phone
- (847) 279-0061
- Enumerated
- Mar 27, 2018
- Entity
- Type 1 · individual
Also registered at 890 Garfield Ave Ste 103
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michael Cabahug, PA-CPhysician Assistant1023718129
- Hayley Hausherr, PA-CPhysician Assistant1962274779
- Oruba Hussain, PA-CPhysician Assistant1851021224
- Michael McGinnis, MDInterventional Pain Medicine Physician1013575182
- Scott Miller, M.D.Surgery Physician1891843199
- William Watson, MDSurgery Physician1447265871
Verify William Rittmeyer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036.158666Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
88% more Medicare Part D claims than the average interventional pain medicine physician in 2024
4,329 Medicare Part D claims for 628 beneficiaries, against an average of 2,306 among the 2,100 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims. 2,018 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen713 claims
- Gabapentin441 claims
- Tramadol Hcl372 claims
- Celecoxib316 claims
- Pregabalin263 claims
- Morphine Sulfate Er255 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: $3,392.22
49 payments, mostly food and beverage; the largest payer was Medtronic, Inc. The 1,966 providers of this specialty with any payment received $3,889.53 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
- Advocate Health And Hospitals CorporationBuffalo Grove, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Interventional Pain Medicine Physician providers in Illinois
There are 121 interventional pain medicine physician records in Illinois.
Other interventional pain medicine physician records in Illinois
- Sadiqa Abbas, M.D.Downers Grove, IL1528010634
- Sandeep Amin, MDChicago, IL1184792251
- Zaki AnwarFrankfort, IL1346432481
- Samir Baig, MDRockford, IL1225286941
- Ramesh Bathina, MDAurora, IL1417060146
- Ramsin Benyamin, MD, DABPM, FIPPBloomington, IL1215924410
- Gary Biermann, M.D.Chicago, IL1144242496
- Asokumar BuvanendranChicago, IL1598781676
- Norma Cadayona, M.D.Evergreen Park, IL1265477327
- Kenneth Candido, MDChicago, IL1518937937
Common questions
What is William Rittmeyer, DO's NPI number?
William Rittmeyer, DO's National Provider Identifier (NPI) is 1770088189, issued on Mar 27, 2018. An NPI identifies a provider in billing; it is not a license.
Where is William Rittmeyer, DO located?
The NPPES record lists a practice address at 890 Garfield Ave Ste 103, Libertyville, IL, 60048. Phone: (847) 279-0061. Providers update this record themselves, so call before visiting.
How can I verify William Rittmeyer, DO's license?
NPPES lists Illinois license number 036.158666, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Rittmeyer, DO prescribe under Medicare Part D?
In 2024, William Rittmeyer, DO had 4,329 Medicare Part D claims for 628 beneficiaries; the average among interventional pain medicine physician prescribers was 2,306. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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) 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 27, 2026.