NPI registry status
Active
2026 NPPES data Interventional Cardiology Physician NPI 1003016957 M.D.
Verify on CMS → Shishir Mathur, M.D.
Interventional Cardiology Physician in Glastonbury, Connecticut.
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
2K
Medicare Part D claims · 320 beneficiaries · Interventional Cardiology Physician avg: 3K
Generic prescribing
84%
generic claims · 16% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$1.3K
50 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Shishir Mathur, M.D. filed 2,348 Medicare Part D claims in 2024 as an Interventional Cardiology Physician in Glastonbury, Connecticut, prescribing 84% generic.
- 2K
- Part D claims, 2024
- 84%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥86th
- 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 Shishir Mathur, 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 1003016957), first enumerated 07/19/2007.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 2,348 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
$1.3K in reported industry payments (50 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 1003016957 · Interventional Cardiology Physician
NPI-10 · ENUM-MID · TAX-NARROW · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1003016957
- ENUM-MID 2007
- TAX-NARROW 3,565
- RX-MID 2,348
- BOOK-THIN 33 in Connecticut
- PHOTO-ENUM Joshua Todd, M.D. · 2007
Shishir Mathur, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
2,348 ≥ 86th percentile 86% 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)
Shishir Mathur, 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 Shishir Mathur, M.D.?
Quality data not reportedPrimary specialty
Interventional Cardiology Physician
Medicare Part D claims
2,348 25% vs specialty avg
Specialty distribution in Connecticut
How Interventional Cardiology Physician compares to other specialties among Connecticut 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 | 1003016957 |
|---|---|
| Specialty | Interventional Cardiology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 07/19/2007 |
Hospital and facility affiliations
Facilities where Shishir Mathur, 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.
Hartford Hospital
★★★★☆ 4/5
Hartford, CT
Acute Care Hospitals
CMS CCN: 070025
Starling Physicians, PLLC
Wethersfield, CT
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 Shishir Mathur, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$1.3K
Largest payer
Novartis Pharmaceuticals Corporation
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
Shishir Mathur, M.D. - brand share 16.0%
Interventional Cardiology Physician average
16% brand-name claims vs 84% generic, on 2,348 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.
2,348
Total Claims
$487K
Total Drug Cost
320
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 6,126.3
- Total Day Supply
- 182,479
- Brand vs Generic
- 16% brand / 84% generic
- Brand Drug Cost
- $457K
- Generic Drug Cost
- $31K
Patient Demographics
- Average Patient Age
- 76.0 years
- Avg HCC Risk Score
- 1.76
- Gender Split
- 45% female / 55% male
- Age Distribution
- <65: 14, 65-74: 124, 75-84: 140, 85+: 42
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Shishir Mathur, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Metoprolol Succinate
Metoprolol Succinate
332 claims
- Atorvastatin Calcium
Atorvastatin Calcium
240 claims
- Eliquis
Eliquis
152 claims
- Rosuvastatin Calcium 126
Rosuvastatin Calcium
126 claims
- Clopidogrel 121
Clopidogrel
121 claims
- Losartan Potassium 108
Losartan Potassium
108 claims
- Carvedilol 95
Carvedilol
95 claims
- Metoprolol Tartrate 90
Metoprolol Tartrate
90 claims
| Drug | Claims |
|---|---|
| Metoprolol Succinate | 332 |
| Atorvastatin Calcium | 240 |
| Eliquis Apixaban | 152 |
| Rosuvastatin Calcium | 126 |
| Clopidogrel Clopidogrel Bisulfate | 121 |
| Losartan Potassium | 108 |
| Carvedilol | 95 |
| Metoprolol Tartrate | 90 |
| Amlodipine Besylate | 73 |
| Lisinopril | 60 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Interventional Cardiology Physician in CT →
All providers in Connecticut →
Compare specialties →
Interventional Cardiology Physician Overview
How Shishir Mathur, M.D. 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
Shishir Mathur, M.D.'s 2,348 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 Mathur, both outside Connecticut 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 Interventional Cardiology Physician Providers in Connecticut
Other clinicians with the same primary specialty enrolled in Connecticut, drawn from the same CMS NPPES roster as Mathur.
One of 33 Interventional Cardiology Physician providers enrolled in Connecticut, 5 are shown here.
Dr. Robert Attaran
M.D., F.A.C.C.
Bridgeport, CT
Dr. Talhat Azemi
M.D.
Hartford, CT
Dr. Barbara Burtness
M.D.
New Haven, CT
Dr. Patrick Corcoran
M.D.
Bloomfield, CT
Dr. Hari Deshpande
MD
New Haven, CT
Compare Interventional Cardiology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Shishir Mathur, M.D.'s specialty? ▼
Shishir Mathur, M.D. specializes in Interventional Cardiology Physician and practices in Glastonbury, Connecticut. Credentials: M.D..
How much does Shishir Mathur, M.D. prescribe under Medicare Part D? ▼
In 2024, Shishir Mathur, M.D. wrote 2,348 Medicare Part D claims totaling $487K in drug costs for 320 beneficiaries.
Where is Shishir Mathur, M.D. located? ▼
Shishir Mathur, M.D. is located at 27 SYCAMORE ST STE 400, Glastonbury, CT, 06033. Phone: (860) 633-0500.
What is Shishir Mathur, M.D.'s NPI number? ▼
Shishir Mathur, M.D.'s National Provider Identifier (NPI) is 1003016957, issued on 07/19/2007.
Does Shishir Mathur, M.D. prescribe more brand-name or generic drugs? ▼
Shishir Mathur, M.D.'s prescribing is 16% brand-name and 84% generic drugs by claim count, with $457K 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.
What drugs does Shishir Mathur, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Shishir Mathur, M.D.'s most frequently prescribed drugs include Metoprolol Succinate, Atorvastatin Calcium, Eliquis. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Shishir Mathur, M.D. accept Medicare? ▼
Shishir Mathur, M.D. appears in CMS Medicare data with 2,348 Part D claims and 320 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Shishir Mathur, M.D.'s credentials? ▼
Shishir Mathur, M.D.'s NPI is 1003016957 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.