Sondra Williams, PA
Physician Assistant · Flagstaff, AZ
Sondra Williams, PA is a physician assistant with a practice address in Flagstaff, Arizona, and NPI 1316461296, issued on Aug 1, 2017. Check the license (Arizona 6841, as entered in NPPES) with the Arizona board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Sondra Williams
- Credential
- PA
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 6841 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 2000 S Thompson St, Flagstaff, AZ 86001
- Phone
- (928) 226-6400
- Enumerated
- Aug 1, 2017
- Record last updated
- Jan 15, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (928) 226-6401
- Medicare enrollment
- Enrolled (PECOS I20241211001064); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 3,666 in Arizona → Look up another NPI →
Also registered at 2000 S Thompson St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Andrew Atiemo, M.D.Interventional Cardiology Physician1285678748
- Bryan Barker, DPTPhysical Therapist1942615778
- Martha Barlow, CNMNurse Practitioner1770846842
- Norria Brice, ACNP-BCAcute Care Nurse Practitioner1407131758
- Barbara Burggraaff, MDSleep Medicine (Otolaryngology) Physician1730112442
- Renzo Cataldo, M.D.Clinical Cardiac Electrophysiology Physician1174526677
Verify Sondra Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Arizona board licenses this profession
Search for license 6841Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
33% fewer Medicare Part D claims than the average physician assistant in 2024
555 Medicare Part D claims for 159 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 39% of claims.
Most prescribed
- Eliquis169 claims
- Metoprolol Succinate119 claims
- Flecainide Acetate52 claims
- Xarelto43 claims
- Diltiazem 24hr Er (Cd)23 claims
- Dofetilide23 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): 77 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).
One hospital affiliation
- Kayenta Alternative Rural HospitalDennehotso, AZ · Acute Care Hospitals
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov).
Sondra Williams among 3,666 physician assistant records in Arizona
Sondra Williams, PA is one of 3,666 physician assistant records with a practice address in Arizona. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 44% of them.
- NPI issued2017 · 44% of these records are older, 52% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2017 · median 2018 among the 2,207 with a school on file
- Record last updated2021 · 35% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
63 physician assistant records list a practice address in Flagstaff
They are 63 of the 2,419 NPPES records with a practice address in Flagstaff, and 3,666 physician assistant records in Arizona.
All 3,666 in Arizona → Every provider in Flagstaff → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Michelle Boyer, PA-CFlagstaff, AZ 860011770519183
- Kelly Czarnecki, PACFlagstaff, AZ 860011043234610
- Tammy Doering, PAFlagstaff, AZ 860011609800135
- Erin Engel, PA-CFlagstaff, AZ 860011033152921
- Tara Gordon, P.A.Flagstaff, AZ 860011962552661
- Greg Harris, PA-CFlagstaff, AZ 860011487684049
- Colin Hickenlooper, PA-CFlagstaff, AZ 860011972550192
- Sandra Kellett, PA-CFlagstaff, AZ 860011396860169
Common questions
What is Sondra Williams, PA's NPI number?
Sondra Williams, PA's National Provider Identifier (NPI) is 1316461296, issued on Aug 1, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Sondra Williams, PA located?
The NPPES record lists a practice address at 2000 S Thompson St, Flagstaff, AZ, 86001. Phone: (928) 226-6400. Providers update this record themselves, so call before visiting.
How can I verify Sondra Williams, PA's license?
NPPES lists Arizona license number 6841, as entered by the provider. Search the Arizona board that licenses this profession; the NPPES record confirms identity only.
How much does Sondra Williams, PA prescribe under Medicare Part D?
In 2024, Sondra Williams, PA had 555 Medicare Part D claims for 159 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
What is Sondra Williams, PA's MIPS final score?
The 2023 MIPS final score is 77 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.