NPI registry status
Active
2026 NPPES data Cardiovascular Disease Physician NPI 1063622801 M.D.
Verify on CMS → Timothy Irwin, M.D.
Cardiovascular Disease Physician in Yankton, 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 25,298 in Cardiovascular Disease 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
8K
Medicare Part D claims · 924 beneficiaries · Cardiovascular Disease Physician avg: 3K
Generic prescribing
79%
generic claims · 21% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$128.16
4 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Timothy Irwin, M.D. filed 7,970 Medicare Part D claims in 2024 as a Cardiovascular Disease Physician in Yankton, South Dakota, prescribing 79% generic.
- 8K
- Part D claims, 2024
- 79%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥97th
- 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 Timothy Irwin, M.D.
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 1063622801), first enumerated 05/23/2007.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 7,970 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
2 CMS Care Compare hospital affiliations on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$128.16 in reported industry payments (4 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- 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 1063622801 · Cardiovascular Disease Physician
NPI-10 · ENUM-MID · TAX-MID · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1063622801
- ENUM-MID 2007
- TAX-MID 25K Cardiovascular Disease
- RX-MID 7,970
- BOOK-THIN 40 in South Dakota
- PHOTO-ENUM Dipti Gupta · 2007
Timothy Irwin, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
7,970 ≥ 97th percentile 97% 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)
Timothy Irwin, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations - 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 Timothy Irwin, M.D.?
Quality data not reportedPrimary specialty
Cardiovascular Disease Physician
Medicare Part D claims
7,970 153% vs specialty avg
Specialty distribution in South Dakota
How Cardiovascular Disease 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 Cardiovascular Disease 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 | 1063622801 |
|---|---|
| Specialty | Cardiovascular Disease Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 05/23/2007 |
Hospital and facility affiliations
Facilities where Timothy Irwin, 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.
Sacred Heart Health Services
Yankton, SD
Yankton Medical Clinic PC
Yankton, SD
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Timothy Irwin, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$128
Largest payer
DePuy Synthes Sales Inc.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Brand vs generic prescribing mix · Typical
Timothy Irwin, M.D. - brand share 21.0%
Cardiovascular Disease Physician average
21% brand-name claims vs 79% generic, on 7,970 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.
7,970
Total Claims
$2.2M
Total Drug Cost
924
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 18,785.467
- Total Day Supply
- 557,930
- Brand vs Generic
- 21% brand / 79% generic
- Brand Drug Cost
- $2.1M
- Generic Drug Cost
- $112K
- Antibiotic Claims
- 12
Patient Demographics
- Average Patient Age
- 76.4 years
- Avg HCC Risk Score
- 1.47
- Gender Split
- 45% female / 55% male
- Age Distribution
- <65: 34, 65-74: 372, 75-84: 356, 85+: 162
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Timothy Irwin, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Eliquis
Eliquis
978 claims
- Atorvastatin Calcium
Atorvastatin Calcium
611 claims
- Metoprolol Succinate
Metoprolol Succinate
536 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
509 claims
- Warfarin Sodium
Warfarin Sodium
392 claims
- Spironolactone 347
Spironolactone
347 claims
- Lisinopril 300
Lisinopril
300 claims
- Amlodipine Besylate 297
Amlodipine Besylate
297 claims
| Drug | Claims |
|---|---|
| Eliquis Apixaban | 978 |
| Atorvastatin Calcium | 611 |
| Metoprolol Succinate | 536 |
| Rosuvastatin Calcium | 509 |
| Warfarin Sodium | 392 |
| Spironolactone | 347 |
| Lisinopril | 300 |
| Amlodipine Besylate | 297 |
| Metoprolol Tartrate | 291 |
| Flecainide Acetate | 289 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Cardiovascular Disease Physician Overview
How Timothy Irwin, M.D. fits within the Cardiovascular Disease Physician landscape nationally.
25,298
Cardiovascular Disease Physician Providers in US
54
States with Cardiovascular Disease Physician
3,149
Avg Claims per Provider
Timothy Irwin, M.D.'s 7,970 claims are above the specialty average of 3,149.
Nationwide Cardiovascular Disease Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Irwin, both outside South Dakota so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2007)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Cardiovascular Disease Physician Providers in South Dakota
Other clinicians with the same primary specialty enrolled in South Dakota, drawn from the same CMS NPPES roster as Irwin.
One of 40 Cardiovascular Disease Physician providers enrolled in South Dakota, 5 are shown here.
Dr. Shazia Aziz
MD
Rapid City, SD
Dr. Udit Bhatnagar
MD
Sioux Falls, SD
Dr. Donald Bishop
MD
Sioux Falls, SD
Dr. Amid Bitar
MD
Rapid City, SD
Dr. Sherrie Brooks
D.O.,FACC,FACOI
Sioux Falls, SD
Compare Cardiovascular Disease Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Timothy Irwin, M.D.'s specialty? ▼
Timothy Irwin, M.D. specializes in Cardiovascular Disease Physician and practices in Yankton, South Dakota. Credentials: M.D..
How much does Timothy Irwin, M.D. prescribe under Medicare Part D? ▼
In 2024, Timothy Irwin, M.D. wrote 7,970 Medicare Part D claims totaling $2.2M in drug costs for 924 beneficiaries.
Where is Timothy Irwin, M.D. located? ▼
Timothy Irwin, M.D. is located at 1104 W 8TH ST, Yankton, SD, 57078. Phone: (605) 665-7841.
What is Timothy Irwin, M.D.'s NPI number? ▼
Timothy Irwin, M.D.'s National Provider Identifier (NPI) is 1063622801, issued on 05/23/2007.
Does Timothy Irwin, M.D. prescribe more brand-name or generic drugs? ▼
Timothy Irwin, M.D.'s prescribing is 21% brand-name and 79% generic drugs by claim count, with $2.1M in brand drug costs.
How many Cardiovascular Disease Physician providers are there in the US? ▼
There are 25,298 Cardiovascular Disease Physician providers across 54 states in the US. The average Cardiovascular Disease Physician provider writes 3,149 Medicare Part D claims per year.
What drugs does Timothy Irwin, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Timothy Irwin, M.D.'s most frequently prescribed drugs include Eliquis, Atorvastatin Calcium, Metoprolol Succinate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Timothy Irwin, M.D. accept Medicare? ▼
Timothy Irwin, M.D. appears in CMS Medicare data with 7,970 Part D claims and 924 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Timothy Irwin, M.D.'s credentials? ▼
Timothy Irwin, M.D.'s NPI is 1063622801 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
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.