NPI registry status
Active
2026 NPPES data Neuromuscular Medicine (Psychiatry & Neurology) Physician NPI 1144783580 MD
Verify on CMS → Stephan Castro, MD
Neuromuscular Medicine (Psychiatry & Neurology) Physician in Portland, Oregon.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 353 in Neuromuscular Medicine (Psychiatry & 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.
Prescribing volume
56
Medicare Part D claims · 19 beneficiaries · Neuromuscular Medicine (Psychiatry & Neurology) Physician avg: 921
What the federal data shows
Stephan Castro, MD filed 56 Medicare Part D claims in 2024 as a Neuromuscular Medicine (Psychiatry & Neurology) Physician in Portland, Oregon.
- 56
- Part D claims, 2024
- Likely
- board-certified (heuristic)
- ≥0th
- pct by Part D claim volume (lower-bound band)
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 Stephan Castro, MD
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1144783580), first enumerated 04/11/2019.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 56 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- 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.
CMS NPPES provider registry desk
NPI 1144783580 · Neuromuscular Medicine (Psychiatry & Neurology) Physician
NPI-10 · ENUM-RECENT · TAX-TRACE · RX-TRACE · BOOK-THIN · PHOTO-ENUM
- NPI-10 1144783580
- ENUM-RECENT 2019
- TAX-TRACE 353
- RX-TRACE 56
- BOOK-THIN 4 in Oregon
- PHOTO-ENUM Li Zhang, MD · 2019
Stephan Castro, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
56 ≥ 0th percentile 0% of 1,416,883 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
✓
Board certification likely (heuristic, not verified)
Stephan Castro, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Stephan Castro, MD?
Quality data not reportedPrimary specialty
Neuromuscular Medicine (Psychiatry & Neurology) Physician
Medicare Part D claims
56 94% vs specialty avg
Specialty distribution in Oregon
How Neuromuscular Medicine (Psychiatry & Neurology) Physician compares to other specialties among Oregon 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 Neuromuscular Medicine (Psychiatry & 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 | 1144783580 |
|---|---|
| Specialty | Neuromuscular Medicine (Psychiatry & Neurology) Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 04/11/2019 |
Hospital and facility affiliations
Facilities where Stephan Castro, MD 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.
University Professional Services
Portland, OR
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 2024.
56
Total Claims
$4K
Total Drug Cost
19
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 79.067
- Total Day Supply
- 2,282
- Generic Drug Cost
- $3K
Patient Demographics
- Average Patient Age
- 65.8 years
- Avg HCC Risk Score
- 1.17
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Azathioprine | 14 |
| Pyridostigmine Bromide | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Neuromuscular Medicine (Psychiatry & Neurology) Physician in OR →
All providers in Oregon →
Compare specialties →
Neuromuscular Medicine (Psychiatry & Neurology) Physician Overview
How Stephan Castro, MD fits within the Neuromuscular Medicine (Psychiatry & Neurology) Physician landscape nationally.
353
Neuromuscular Medicine (Psychiatry & Neurology) Physician Providers in US
44
States with Neuromuscular Medicine (Psychiatry & Neurology) Physician
921
Avg Claims per Provider
Stephan Castro, MD's 56 claims are below the specialty average of 921.
Nationwide Neuromuscular Medicine (Psychiatry & Neurology) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Castro, both outside Oregon so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2019)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Neuromuscular Medicine (Psychiatry & Neurology) Physician Providers in Oregon
Other clinicians with the same primary specialty enrolled in Oregon, drawn from the same CMS NPPES roster as Castro.
One of 4 Neuromuscular Medicine (Psychiatry & Neurology) Physician providers enrolled in Oregon, 3 are shown here.
Frequently Asked Questions
What is Stephan Castro, MD's specialty? ▼
Stephan Castro, MD specializes in Neuromuscular Medicine (Psychiatry & Neurology) Physician and practices in Portland, Oregon. Credentials: MD.
How much does Stephan Castro, MD prescribe under Medicare Part D? ▼
In 2024, Stephan Castro, MD wrote 56 Medicare Part D claims totaling $4K in drug costs for 19 beneficiaries.
Where is Stephan Castro, MD located? ▼
Stephan Castro, MD is located at 3181 SW SAM JACKSON PARK RD, Portland, OR, 97239. Phone: (502) 494-7772.
What is Stephan Castro, MD's NPI number? ▼
Stephan Castro, MD's National Provider Identifier (NPI) is 1144783580, issued on 04/11/2019.
How many Neuromuscular Medicine (Psychiatry & Neurology) Physician providers are there in the US? ▼
There are 353 Neuromuscular Medicine (Psychiatry & Neurology) Physician providers across 44 states in the US. The average Neuromuscular Medicine (Psychiatry & Neurology) Physician provider writes 921 Medicare Part D claims per year.
What drugs does Stephan Castro, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Stephan Castro, MD's most frequently prescribed drugs include Azathioprine, Pyridostigmine Bromide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Stephan Castro, MD accept Medicare? ▼
Stephan Castro, MD appears in CMS Medicare data with 56 Part D claims and 19 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Stephan Castro, MD's credentials? ▼
Stephan Castro, MD's NPI is 1144783580 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.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- 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.