NPI registry status
Active
2026 NPPES data Interventional Cardiology Physician NPI 1134169238 MD
Verify on CMS → James Walder, MD
Interventional Cardiology Physician in Rapid City, South Dakota.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 3,565 in Interventional Cardiology 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
40
Medicare Part D claims · Interventional Cardiology Physician avg: 3K
Generic prescribing
73%
generic claims · 28% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
James Walder, MD filed 40 Medicare Part D claims in 2024 as an Interventional Cardiology Physician in Rapid City, South Dakota, prescribing 73% generic.
- 40
- Part D claims, 2024
- 73%
- generic prescribing
- ≥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 James Walder, 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 1134169238), first enumerated 06/07/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 40 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
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.
CMS NPPES provider registry desk
NPI 1134169238 · Interventional Cardiology Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · RX-TRACE · BOOK-THIN · PHOTO-ENUM
- NPI-10 1134169238
- ENUM-LEGACY 2006
- TAX-NARROW 3,565
- RX-TRACE 40
- BOOK-THIN 12 in South Dakota
- PHOTO-ENUM Ron Waksman, M.D. · 2006
James Walder, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
40 ≥ 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-eligible specialty (heuristic, not verified)
James Walder, 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 James Walder, MD?
Quality data not reportedPrimary specialty
Interventional Cardiology Physician
Medicare Part D claims
40 99% vs specialty avg
Specialty distribution in South Dakota
How Interventional Cardiology Physician compares to other specialties among South Dakota 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 Interventional Cardiology 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 | 1134169238 |
|---|---|
| Specialty | Interventional Cardiology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 06/07/2006 |
Brand vs generic prescribing mix · Above average
James Walder, MD - brand share 28.0%
Interventional Cardiology Physician average
28% brand-name claims vs 73% generic, on 40 2024 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
40
Total Claims
$9K
Total Drug Cost
N/A
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 80.467
- Total Day Supply
- 2,300
- Brand vs Generic
- 28% brand / 73% generic
- Brand Drug Cost
- $8K
- Generic Drug Cost
- $1K
Patient Demographics
- Average Patient Age
- 75.5 years
- Avg HCC Risk Score
- 1.04
More Interventional Cardiology Physician in SD →
All providers in South Dakota →
Compare specialties →
Interventional Cardiology Physician Overview
How James Walder, MD fits within the Interventional Cardiology Physician landscape nationally.
3,565
Interventional Cardiology Physician Providers in US
53
States with Interventional Cardiology Physician
3,147
Avg Claims per Provider
James Walder, MD's 40 claims are below the specialty average of 3,147.
Nationwide Interventional Cardiology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Walder, both outside South Dakota 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 Interventional Cardiology Physician Providers in South Dakota
Other clinicians with the same primary specialty enrolled in South Dakota, drawn from the same CMS NPPES roster as Walder.
One of 12 Interventional Cardiology Physician providers enrolled in South Dakota, 5 are shown here.
Dr. Raymond Allen
MD
Sioux Falls, SD
Dr. Mark Fausch
MD
Sioux Falls, SD
Dr. Susheel Gundewar
M.D.
Aberdeen, SD
Dr. Michael Hibbard
MD
Sioux Falls, SD
Dr. Salem Maaliki
MD
Watertown, SD
Compare Interventional Cardiology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is James Walder, MD's specialty? ▼
James Walder, MD specializes in Interventional Cardiology Physician and practices in Rapid City, South Dakota. Credentials: MD.
How much does James Walder, MD prescribe under Medicare Part D? ▼
In 2024, James Walder, MD wrote 40 Medicare Part D claims totaling $9K in drug costs for N/A beneficiaries.
Where is James Walder, MD located? ▼
James Walder, MD is located at 4150 FIFTH STREET, Rapid City, SD, 57701. Phone: (605) 399-4300.
What is James Walder, MD's NPI number? ▼
James Walder, MD's National Provider Identifier (NPI) is 1134169238, issued on 06/07/2006.
Does James Walder, MD prescribe more brand-name or generic drugs? ▼
James Walder, MD's prescribing is 28% brand-name and 73% generic drugs by claim count, with $8K in brand drug costs.
How many Interventional Cardiology Physician providers are there in the US? ▼
There are 3,565 Interventional Cardiology Physician providers across 53 states in the US. The average Interventional Cardiology Physician provider writes 3,147 Medicare Part D claims per year.
Does James Walder, MD accept Medicare? ▼
James Walder, MD appears in CMS Medicare data with 40 Part D claims and N/A Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify James Walder, MD's credentials? ▼
James Walder, MD's NPI is 1134169238 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.