NPI registry status
Active
2026 NPPES data Neurology Physician NPI 1235179334 MD
Verify on CMS → Stephen Hempelman, MD
Neurology Physician in Peoria, Arizona.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 20,467 in Neurology Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
What the federal data shows
Stephen Hempelman, MD is a Neurology Physician in Peoria, Arizona, listed in the federal CMS National Provider Identifier registry.
- #55
- Neurology Physician rank among Arizona specialties
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Federal trust snapshot
What official records show about Stephen Hempelman, MD
Bare NPI registry listing — limited federal enrichment beyond basic enumeration. Verify all credentials with official sources.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1235179334), first enumerated 06/07/2006.
Source: CMS NPPES
- Not in federal data
Medicare Part D participation
No 2023 Medicare Part D prescribing volume appears in the CMS public file for this NPI (may reflect specialty, new enrollment, or non-prescribing role).
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
Compare Hempelman with other Neurology Physician providers
Same primary specialty, same federal CMS NPPES roster.
Also enrolled in Arizona
- Dr. Hamza Abbad, MD Kingman, AZ
- Dr. Rinu Abraham, MD Phoenix, AZ
- Dr. Islam Abujubara, MD Phoenix, AZ
- Dr. Amelia Adcock, M.D. Scottsdale, AZ
- Dr. Charles Adler, M.D. Scottsdale, AZ
- Dr. Garima Agrawal, MD Phoenix, AZ
Other specialties in Peoria: Pharmacist (206) · Behavior Technician (196) · Family Nurse Practitioner (149) · Physical Therapist (149)
CMS NPPES provider registry desk
NPI 1235179334 · Neurology Physician
NPI-10 · ENUM-LEGACY · TAX-MID · RX-NONE · BOOK-THIN · PHOTO-ENUM
- NPI-10 1235179334
- ENUM-LEGACY 2006
- TAX-MID 20K Neurology Physician
- RX-NONE No Part D
- BOOK-THIN 436 in Arizona
- PHOTO-ENUM Alvaro Padilla, MD · 2006
◑
Board-eligible specialty (heuristic, not verified)
Stephen Hempelman, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Stephen Hempelman, MD?
Quality data not reportedPrimary specialty
Neurology Physician
Specialty distribution in Arizona
How Neurology Physician compares to other specialties among Arizona providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Neurology Physician. Verify directly:
How MIPS and board certification work
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).
Practice Address
Provider Details
| NPI | 1235179334 |
|---|---|
| Specialty | Neurology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 06/07/2006 |
Neurology Physician Overview
How Stephen Hempelman, MD fits within the Neurology Physician landscape nationally.
20,467
Neurology Physician Providers in US
54
States with Neurology Physician
1,356
Avg Claims per Provider
Nationwide Neurology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Hempelman, both outside Arizona so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Neurology Physician Providers in Arizona
Other clinicians with the same primary specialty enrolled in Arizona, drawn from the same CMS NPPES roster as Hempelman.
One of 436 Neurology Physician providers enrolled in Arizona, 11 are shown on this page.
Dr. Nimfa Aguila
M.D.
Yuma, AZ
Dr. Maria Aguilar
MD
Phoenix, AZ
Dr. Yazan Al-Hasan
MD
Phoenix, AZ
Dr. Isam Alannouf
MD
Tucson, AZ
Hania Alexander
PA-C
Scottsdale, AZ
Compare Neurology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Stephen Hempelman, MD's specialty? ▼
Stephen Hempelman, MD specializes in Neurology Physician and practices in Peoria, Arizona. Credentials: MD.
Where is Stephen Hempelman, MD located? ▼
Stephen Hempelman, MD is located at 13760 N 93RD AVE, Peoria, AZ, 85381. Phone: (623) 876-3940.
What is Stephen Hempelman, MD's NPI number? ▼
Stephen Hempelman, MD's National Provider Identifier (NPI) is 1235179334, issued on 06/07/2006.
How many Neurology Physician providers are there in the US? ▼
There are 20,467 Neurology Physician providers across 54 states in the US. The average Neurology Physician provider writes 1,356 Medicare Part D claims per year.
Does Stephen Hempelman, MD accept Medicare? ▼
Stephen Hempelman, MD appears in CMS Medicare data. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Stephen Hempelman, MD's credentials? ▼
Stephen Hempelman, MD's NPI is 1235179334 with credentials MD. 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
View source datasets and methodology notes
- 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.
- 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 August 2026 (NPPES) / 2024 (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
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.