Michelle K B Williams, MD
Emergency Medicine Physician · Tucson, AZ
Michelle K B Williams, MD is an emergency medicine physician with a practice address in Tucson, Arizona, and NPI 1811079858, issued on Oct 19, 2006. Check the license (Arizona 26394, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Michelle K B Williams
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 26394 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 5301 E Grant Road, Tucson, AZ 85712
- Phone
- (520) 324-1922
- Enumerated
- Oct 19, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (520) 324-1088
- Medicaid ID
- 496423-01 AZ
- Medicare enrollment
- Enrolled (PECOS I20100721000651); accepts Medicare assignment
- Medical or professional school
- University Of Arizona College Of Medicine, 1996
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,494 in Arizona → Look up another NPI →
Also registered at 5301 E Grant Road
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Tara Alexander, PA CPhysician Assistant1720160732
- Kent Carey, MDEmergency Medicine Physician1356423438
- David Compton, MDEmergency Medicine Physician1427130509
- Christopher Florence, MDEmergency Medicine Physician1003998022
- Bob Foster, MDEmergency Medicine Physician1538241559
- Brian Hagerty, MDPediatric Emergency Medicine (Pediatrics) Physician1134201189
Verify Michelle K B Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 26394Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
42% fewer Medicare Part D claims than the average emergency medicine physician in 2024
132 Medicare Part D claims for 91 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 11 claims were for opioids.
Most prescribed
- Cephalexin16 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): 97.8 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).
Bills Medicare through one group practice
- Sound Physicians Emergency Medicine OF Arizona IncTucson, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michelle K B Williams among 1,494 emergency medicine physician records in Arizona
Michelle K B Williams, MD is one of 1,494 emergency medicine physician records with a practice address in Arizona. 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 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 62% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 55% of these records are
- Graduated1996 · median 2014 among the 828 with a school on file
- Record last updated2007 · 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 207P00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
422 emergency medicine physician records list a practice address in Tucson
They are 422 of the 18,788 NPPES records with a practice address in Tucson, and 1,494 emergency medicine physician records in Arizona.
All 1,494 in Arizona → Every provider in Tucson → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Katharine Altieri, M.D.Tucson, AZ 857121194091256
- Christopher Cabanillas, M.D.Tucson, AZ 857121487884045
- Kent Carey, MDTucson, AZ 857121356423438
- David Compton, MDTucson, AZ 857121427130509
- Christopher Florence, MDTucson, AZ 857121003998022
- Bob Foster, MDTucson, AZ 857121538241559
- Sarah Hypes, MDTucson, AZ 857121760795371
- Keith Kaback, MDTucson, AZ 857121154403186
Common questions
What is Michelle K B Williams, MD's NPI number?
Michelle K B Williams, MD's National Provider Identifier (NPI) is 1811079858, issued on Oct 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michelle K B Williams, MD located?
The NPPES record lists a practice address at 5301 E Grant Road, Tucson, AZ, 85712. Phone: (520) 324-1922. Providers update this record themselves, so call before visiting.
How can I verify Michelle K B Williams, MD's license?
NPPES lists Arizona license number 26394, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Michelle K B Williams, MD prescribe under Medicare Part D?
In 2024, Michelle K B Williams, MD had 132 Medicare Part D claims for 91 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Michelle K B Williams, MD's MIPS final score?
The 2023 MIPS final score is 97.8 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.