2026 NPPES data Neurology with Special Qualifications in Child Neurology Physician NPI 1255303236 M.D.
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ALYX PORTER UMPHREY, M.D.

Neurology with Special Qualifications in Child Neurology Physician in SCOTTSDALE, Arizona. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
183
Medicare Part D claims · 52 beneficiaries · Neurology with Special Qualifications in Child Neurology Physician avg: 359
MIPS score
78.5864/100
▼ 5 pts below national avg 83.1 · [object Object]
What the federal data reveals: ALYX PORTER UMPHREY, M.D. is a Neurology with Special Qualifications in Child Neurology Physician ([object Object]) practicing in SCOTTSDALE, Arizona with a Medicare Part D prescribing footprint of 183 claims across 52 beneficiaries . Their CMS MIPS Final Score of 78.5864/100 (national average: 83.1) reflects performance across Quality, Cost, Interoperability, and Improvement Activities .

What stands out: ALYX PORTER UMPHREY, M.D. reported a CMS MIPS final score of 78.5864 out of 100, below the 83.1 national average, and filed 183 Medicare Part D claims in 2023. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

ALYX PORTER UMPHREY, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

ALYX PORTER UMPHREY, M.D. at a glance

Near national average

NPI registry status

Active

Issued 02/03/2006

NPI 1255303236

Primary specialty

Neurology with Special Qualifications in Child Neurology Physician

Niche

1,803 US NPIs in this specialty

Medicare Part D claims

183 49% vs specialty avg

2023 prescription claims

Specialty avg: 359

MIPS final score

78.5864/100 4.513599999999997% pts

Above neutral band

vs 83.1 national avg

Specialty distribution in Arizona

How Neurology with Special Qualifications in Child Neurology Physician compares to other specialties among Arizona providers

Arizona providers

Neurology with Special Qualifications in Child Neurology Physician share within Arizona

1. Neurology with Special Qualifications in Child Neurology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Neurology with Special Qualifications in Child Neurology Physician share within Arizona

Medicare quality performance — MIPS

ALYX PORTER UMPHREY, M.D.'s 2023 MIPS final score plotted against the Neurology with Special Qualifications in Child Neurology Physician national average

Near national average
MIPS Final Score
78.5864/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Neurology with Special Qualifications in Child Neurology Physician) — 78.5864/100 vs national avg 83.1

0%100%National avg83%78.6%
MIPS final score (Neurology with Special Qualifications in Child Neurology Physician) — 78.5864/100 vs national avg 83.1

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

ALYX PORTER UMPHREY, M.D. is a Neurology with Special Qualifications in Child Neurology Physician provider practicing in SCOTTSDALE, Arizona, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1255303236. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

ALYX PORTER UMPHREY, M.D. appears in the CMS NPPES registry as a Neurology with Special Qualifications in Child Neurology Physician provider holding M.D. credentials at 13400 E SHEA BLVD, SCOTTSDALE, AZ, 85259, with a listed phone of (480) 301-8000. NPI 1255303236 was issued on 02/03/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what PORTER UMPHREY most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 183 prescription claims written by this provider, covering 52 Medicare beneficiaries and totaling roughly $7K in drug spend. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 78.5864/100 for the 2023 performance year (Quality 69.056, Cost 59.5653), compared with the national average of 83.1.

Neurology with Special Qualifications in Child Neurology Physician is a narrow specialty nationwide, with 1,803 enrolled providers across 51 states and an average of 359 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

13400 E SHEA BLVD
SCOTTSDALE, AZ 85259

Provider Details

NPI 1255303236
Specialty Neurology with Special Qualifications in Child Neurology Physician
Credentials M.D.
Gender Female
NPI Issued 02/03/2006

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

78.5864
Final Score
Avg: 83.1
69.056
Quality
59.5653
Cost
100
Promoting Interoperability

Reporting: Group practice

Hospital and facility affiliations

Facilities where ALYX PORTER UMPHREY, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" — a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

MAYO CLINIC ARIZONA
SCOTTSDALE, AZ

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

183
Total Claims
$7K
Total Drug Cost
52
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
321
Total Day Supply
8,921
Generic Drug Cost
$6K

Patient Demographics

Average Patient Age
70.0 years
Avg HCC Risk Score
1.95
Gender Split
58% female / 42% male

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Dexamethasone
29
Levetiracetam
24
Ondansetron Hcl
13
Donepezil Hcl
12

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Neurology with Special Qualifications in Child Neurology Physician Overview

How ALYX PORTER UMPHREY, M.D. fits within the Neurology with Special Qualifications in Child Neurology Physician landscape nationally.

1,803
Neurology with Special Qualifications in Child Neurology Physician Providers in US
51
States with Neurology with Special Qualifications in Child Neurology Physician
359
Avg Claims per Provider

ALYX PORTER UMPHREY, M.D.'s 183 claims are below the specialty average of 359.

Nearby Neurology with Special Qualifications in Child Neurology Physician Providers in Arizona

Other clinicians with the same primary specialty enrolled in Arizona, drawn from the same CMS NPPES roster as PORTER UMPHREY.

Compare Neurology with Special Qualifications in Child Neurology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is ALYX PORTER UMPHREY, M.D.'s specialty?
ALYX PORTER UMPHREY, M.D. specializes in Neurology with Special Qualifications in Child Neurology Physician and practices in SCOTTSDALE, Arizona. Credentials: M.D..
How much does ALYX PORTER UMPHREY, M.D. prescribe under Medicare Part D?
In 2023, ALYX PORTER UMPHREY, M.D. wrote 183 Medicare Part D claims totaling $7K in drug costs for 52 beneficiaries.
What is ALYX PORTER UMPHREY, M.D.'s Medicare quality score?
ALYX PORTER UMPHREY, M.D. has a CMS MIPS Final Score of 78.5864/100 (Quality: 69.056, Cost: 59.5653). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is ALYX PORTER UMPHREY, M.D. located?
ALYX PORTER UMPHREY, M.D. is located at 13400 E SHEA BLVD, SCOTTSDALE, AZ, 85259. Phone: (480) 301-8000.
What is ALYX PORTER UMPHREY, M.D.'s NPI number?
ALYX PORTER UMPHREY, M.D.'s National Provider Identifier (NPI) is 1255303236, issued on 02/03/2006.
How many Neurology with Special Qualifications in Child Neurology Physician providers are there in the US?
There are 1,803 Neurology with Special Qualifications in Child Neurology Physician providers across 51 states in the US. The average Neurology with Special Qualifications in Child Neurology Physician provider writes 359 Medicare Part D claims per year.
What drugs does ALYX PORTER UMPHREY, M.D. prescribe most often?
Based on 2023 Medicare Part D data, ALYX PORTER UMPHREY, M.D.'s most frequently prescribed drugs include Dexamethasone, Levetiracetam, Ondansetron Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ALYX PORTER UMPHREY, M.D. accept Medicare?
ALYX PORTER UMPHREY, M.D. appears in CMS Medicare data with 183 Part D claims and 52 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ALYX PORTER UMPHREY, M.D.'s credentials?
ALYX PORTER UMPHREY, M.D.'s NPI is 1255303236 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) — 2023 performance year.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology