2026 NPPES data Internal Medicine Physician NPI 1629259932 MD, MBBS
Verify on CMS →

JAYKUMAR THUMAR, MD, MBBS

Internal Medicine Physician in ENFIELD, Connecticut. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
668
Medicare Part D claims · 128 beneficiaries · Internal Medicine Physician avg: 3K
Industry payments
$595
2 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

JAYKUMAR THUMAR, MD, MBBS filed 668 Medicare Part D claims in 2023 as a Internal Medicine Physician in ENFIELD, Connecticut.

668
Part D claims, 2023
Likely
board-certified (heuristic)

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.

JAYKUMAR THUMAR, MD, MBBS's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

668 Top 31% higher than 69% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). This entry sits in this band. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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.

Source CMS Medicare Part D Prescriber Public Use File · 2023

Board certification likely (heuristic — not verified)

JAYKUMAR THUMAR, MD, MBBS 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 JAYKUMAR THUMAR, MD, MBBS?

Quality data not reported

NPI registry status

Active

Issued 11/15/2007

NPI 1629259932

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

668 75% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in Connecticut

How Internal Medicine Physician compares to other specialties among Connecticut providers

Connecticut providers

Internal Medicine Physician share within Connecticut

1. Internal Medicine Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Internal Medicine Physician share within Connecticut

Specialty board-certification context

Estimated specialty board-certified rate — Internal Medicine Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Internal Medicine Physician ABMS/AOA estimate

Est. board-certified rate (Internal Medicine Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Internal Medicine Physician) — ABMS / AOA estimate

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).

JAYKUMAR THUMAR, MD, MBBS appears in the CMS NPPES registry as a Internal Medicine Physician provider holding MD, MBBS credentials at 142 HAZARD AVE, ENFIELD, CT, 06082, with a listed phone of (860) 272-2911. NPI 1629259932 was issued on 11/15/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what THUMAR most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 668 prescription claims written by this provider, covering 128 Medicare beneficiaries and totaling roughly $252K in drug spend, with an opioid prescribing rate of 10.0%. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 enrolled providers across 56 states and an average of 2,716 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

142 HAZARD AVE
ENFIELD, CT 06082

Provider Details

NPI 1629259932
Specialty Internal Medicine Physician
Credentials MD, MBBS
Gender Male
NPI Issued 11/15/2007

Hospital and facility affiliations

Facilities where JAYKUMAR THUMAR, MD, MBBS 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
THE WILLIAM W BACKUS HOSPITAL
NORWICH, 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 JAYKUMAR THUMAR, MD, MBBS. Source: openpaymentsdata.cms.gov.

Total received

$595

Largest payer

AstraZeneca Pharmaceuticals LP

Most common payment type

Education

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.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

668
Total Claims
$252K
Total Drug Cost
128
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
823
Total Day Supply
18,363
Generic Drug Cost
$94K
Opioid Claims
67 (10.0% rate)
Antibiotic Claims
26

Patient Demographics

Average Patient Age
73.0 years
Avg HCC Risk Score
2.05
Gender Split
50% female / 50% male
Age Distribution
<65: 18, 65-74: 53, 75-84: 45, 85+: 12

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What JAYKUMAR THUMAR, MD, MBBS prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Dexamethasone
57
Ondansetron Hcl
53
Oxycodone Hcl
41
Metoclopramide Hcl
36
Xarelto
Rivaroxaban
31
Prochlorperazine Maleate
28
Lorazepam
26
Pantoprazole Sodium
25
Levothyroxine Sodium
24
Prednisone
22

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Internal Medicine Physician Overview

How JAYKUMAR THUMAR, MD, MBBS fits within the Internal Medicine Physician landscape nationally.

172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider

JAYKUMAR THUMAR, MD, MBBS's 668 claims are below the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in Connecticut

Other clinicians with the same primary specialty enrolled in Connecticut, drawn from the same CMS NPPES roster as THUMAR.

Compare Internal Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is JAYKUMAR THUMAR, MD, MBBS's specialty?
JAYKUMAR THUMAR, MD, MBBS specializes in Internal Medicine Physician and practices in ENFIELD, Connecticut. Credentials: MD, MBBS.
How much does JAYKUMAR THUMAR, MD, MBBS prescribe under Medicare Part D?
In 2023, JAYKUMAR THUMAR, MD, MBBS wrote 668 Medicare Part D claims totaling $252K in drug costs for 128 beneficiaries.
Where is JAYKUMAR THUMAR, MD, MBBS located?
JAYKUMAR THUMAR, MD, MBBS is located at 142 HAZARD AVE, ENFIELD, CT, 06082. Phone: (860) 272-2911.
What is JAYKUMAR THUMAR, MD, MBBS's NPI number?
JAYKUMAR THUMAR, MD, MBBS's National Provider Identifier (NPI) is 1629259932, issued on 11/15/2007.
Does JAYKUMAR THUMAR, MD, MBBS prescribe opioids?
Yes, JAYKUMAR THUMAR, MD, MBBS had 67 opioid claims in 2023 with an opioid prescribing rate of 10.0%.
How many Internal Medicine Physician providers are there in the US?
There are 172,858 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does JAYKUMAR THUMAR, MD, MBBS prescribe most often?
Based on 2023 Medicare Part D data, JAYKUMAR THUMAR, MD, MBBS's most frequently prescribed drugs include Dexamethasone, Ondansetron Hcl, Oxycodone Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does JAYKUMAR THUMAR, MD, MBBS accept Medicare?
JAYKUMAR THUMAR, MD, MBBS appears in CMS Medicare data with 668 Part D claims and 128 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JAYKUMAR THUMAR, MD, MBBS's credentials?
JAYKUMAR THUMAR, MD, MBBS's NPI is 1629259932 with credentials MD, MBBS. 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

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 (2023). 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 April 2026 (NPPES) / 2023 (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