Alyx B. Porter Umphrey, M.D.
Neurology Physician · Scottsdale, AZ
Alyx B. Porter Umphrey, M.D. is a neurology physician with a practice address in Scottsdale, Arizona, and NPI 1255303236, issued on Feb 3, 2006. Check the license (Arizona 40546, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Alyx B. Porter Umphrey
- Credential
- M.D.
- Primary taxonomy
- Neurology Physician 2084N0400X
- License numbers
- 40546 AZ
46828 MN
Self-reported in NPPES; status is on the state search - Practice location
- 13400 E Shea Blvd, Scottsdale, AZ 85259
- Phone
- (480) 301-8000
- Enumerated
- Feb 3, 2006
- Record last updated
- Sep 3, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20080801000186); accepts Medicare assignment
- Medical or professional school
- Temple University School Of Medicine, 2003
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 13400 E Shea Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Haidar Abdul-Muhsin, M.B.CH.B.Urology Physician1356755250
- Ali Abdulsahib, MDInfectious Disease Physician1417535030
Verify Alyx B. Porter Umphrey in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 40546Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average neurology physician in 2024
138 Medicare Part D claims for 41 beneficiaries, against an average of 1,370 among the 15,005 providers of this specialty who prescribed in Part D.
Most prescribed
- Levetiracetam23 claims
- Dexamethasone20 claims
- Gabapentin11 claims
- Topiramate11 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): 78.6 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
- Mayo Clinic ArizonaScottsdale, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Neurology Physician providers in Arizona
There are 458 neurology physician records in Arizona.
Other neurology physician records in Arizona
- Hamza Abbad, MDKingman, AZ1710567136
- Rinu Abraham, MDPhoenix, AZ1518353234
- Islam Abujubara, MDPhoenix, AZ1265626774
- Amelia Adcock, M.D.Scottsdale, AZ1497982623
- Abdirahim AdenScottsdale, AZ1356065395
- Charles Adler, M.D.Scottsdale, AZ1023091022
- Garima Agrawal, MDPhoenix, AZ1558854935
- Nimfa Aguila, M.D.Yuma, AZ1588717763
- Maria Aguilar, MDPhoenix, AZ1518924190
- Yazan Al-Hasan, MDPhoenix, AZ1578927968
Common questions
What is Alyx B. Porter Umphrey, M.D.'s NPI number?
Alyx B. Porter Umphrey, M.D.'s National Provider Identifier (NPI) is 1255303236, issued on Feb 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Alyx B. Porter Umphrey, M.D. located?
The NPPES record lists a practice address at 13400 E Shea Blvd, Scottsdale, AZ, 85259. Phone: (480) 301-8000. Providers update this record themselves, so call before visiting.
How can I verify Alyx B. Porter Umphrey, M.D.'s license?
NPPES lists Arizona license number 40546, 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 Alyx B. Porter Umphrey, M.D. prescribe under Medicare Part D?
In 2024, Alyx B. Porter Umphrey, M.D. had 138 Medicare Part D claims for 41 beneficiaries; the average among neurology physician prescribers was 1,370. Part D covers Medicare prescriptions only.
What is Alyx B. Porter Umphrey, M.D.'s MIPS final score?
The 2023 MIPS final score is 78.6 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.