Ryan Michael Bass, D.O.
Emergency Medicine Physician · Milwaukee, WI
Ryan Michael Bass, D.O. is an emergency medicine physician with a practice address in Milwaukee, Wisconsin, and NPI 1548467764, issued on Jun 29, 2007. Check the license on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Ryan Michael Bass
- Credential
- D.O.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 5672 NE
Self-reported in NPPES; status is on the state search - Practice location
- 945 N 12TH St, Milwaukee, WI 53233
- Phone
- (414) 219-2000
- Enumerated
- Jun 29, 2007
- Record last updated
- Dec 29, 2021 (not updated in 5 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,464 in Wisconsin → Look up another NPI →
Also registered at 945 N 12TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Ola AhmadStudent in an Organized Health Care Education/Training Program1629871645
Verify Ryan Michael Bass in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining BoardCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4% fewer Medicare Part D claims than the average emergency medicine physician in 2024
216 Medicare Part D claims for 149 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 56 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen45 claims
- Cefdinir13 claims
- Ondansetron Odt12 claims
- Prednisone12 claims
- Sulfamethoxazole-Trimethoprim11 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.
Ryan Michael Bass among 1,464 emergency medicine physician records in Wisconsin
Ryan Michael Bass, D.O. is one of 1,464 emergency medicine physician records with a practice address in Wisconsin. 79% 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 42% of them.
- NPI issued2007 · 42% of these records are older, 52% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 58% of these records are
- Record last updated2021 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
358 emergency medicine physician records list a practice address in Milwaukee
They are 358 of the 18,389 NPPES records with a practice address in Milwaukee, and 1,464 emergency medicine physician records in Wisconsin.
All 1,464 in Wisconsin → Every provider in Milwaukee → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Jaime Butler, MDMilwaukee, WI 532331033120126
- Paul Coogan, MDMilwaukee, WI 532331679526065
- Warren Entwistle, DOMilwaukee, WI 532331225004310
- James Holmberg, M.D.Milwaukee, WI 532331902889736
- Cheryl Jeanpierre, D.O.Milwaukee, WI 532331750343497
- Anne Johnson, M.D.Milwaukee, WI 532331235156878
- Ann Lagerlund, M.D.Milwaukee, WI 532331497965172
- Toula Lazarides, M.D.Milwaukee, WI 532331699737247
Common questions
What is Ryan Michael Bass, D.O.'s NPI number?
Ryan Michael Bass, D.O.'s National Provider Identifier (NPI) is 1548467764, issued on Jun 29, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Ryan Michael Bass, D.O. located?
The NPPES record lists a practice address at 945 N 12TH St, Milwaukee, WI, 53233. Phone: (414) 219-2000. Providers update this record themselves, so call before visiting.
How can I verify Ryan Michael Bass, D.O.'s license?
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 Ryan Michael Bass, D.O. prescribe under Medicare Part D?
In 2024, Ryan Michael Bass, D.O. had 216 Medicare Part D claims for 149 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.