NPI registry status
Active
2026 NPPES data Gastroenterology Physician NPI 1891876785 MD
Verify on CMS → Thomas Nowak, MD
Gastroenterology Physician in Indianapolis, Indiana.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 16,567 in Gastroenterology 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
932
Medicare Part D claims · 225 beneficiaries · Gastroenterology Physician avg: 833
Industry payments
$14.98
1 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Thomas Nowak, MD filed 932 Medicare Part D claims in 2023 as a Gastroenterology Physician in Indianapolis, Indiana.
- 932
- 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.
Thomas Nowak, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
932 Top 25% higher than 75% of 1,370,886 prescribers
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)
Thomas Nowak, 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 Thomas Nowak, MD?
Quality data not reportedPrimary specialty
Gastroenterology Physician
Medicare Part D claims
932 12% vs specialty avg
Specialty distribution in Indiana
How Gastroenterology Physician compares to other specialties among Indiana 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 Gastroenterology 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).
Thomas Nowak, MD appears in the CMS NPPES registry as a Gastroenterology Physician provider holding MD credentials at 1701 N SENATE BLVD, Indianapolis, IN, 46202, with a listed phone of (888) 484-3258. NPI 1891876785 was issued on 10/18/2006.
Medicare Part D records for calendar year 2023 show 932 prescription claims written by this provider, covering 225 Medicare beneficiaries and totaling roughly $806K in drug spend.
Gastroenterology Physician is a mid-sized specialty nationwide, with 16,567 enrolled providers across 54 states and an average of 833 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
Provider Details
| NPI | 1891876785 |
|---|---|
| Specialty | Gastroenterology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 10/18/2006 |
Hospital and facility affiliations
Facilities where Thomas Nowak, 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.
IU Health Medical Group LLC
Indianapolis, IN
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 Thomas Nowak, MD. Source: openpaymentsdata.cms.gov.
Total received
$15
Largest payer
Ardelyx, 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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
932
Total Claims
$806K
Total Drug Cost
225
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,579
- Total Day Supply
- 42,418
- Generic Drug Cost
- $42K
Patient Demographics
- Average Patient Age
- 64.1 years
- Avg HCC Risk Score
- 1.76
- Gender Split
- 69% female / 31% male
- Age Distribution
- <65: 91, 65-74: 86, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Thomas Nowak, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Promethazine Hcl
Promethazine Hcl
123 claims
- Famotidine
Famotidine
98 claims
- Omeprazole
Omeprazole
97 claims
- Dronabinol
Dronabinol
87 claims
- Pantoprazole Sodium
Pantoprazole Sodium
68 claims
- Linzess
Linzess
54 claims
- Ondansetron Odt
Ondansetron Odt
50 claims
- Dicyclomine Hcl 27
Dicyclomine Hcl
27 claims
| Drug | Claims |
|---|---|
| Promethazine Hcl | 123 |
| Famotidine | 98 |
| Omeprazole | 97 |
| Dronabinol | 87 |
| Pantoprazole Sodium | 68 |
| Linzess Linaclotide | 54 |
| Ondansetron Odt Ondansetron | 50 |
| Dicyclomine Hcl | 27 |
| Peg 3350-Electrolyte Sodium Chloride/Nahco3/Kcl/Peg | 26 |
| Creon Lipase/Protease/Amylase | 22 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Gastroenterology Physician Overview
How Thomas Nowak, MD fits within the Gastroenterology Physician landscape nationally.
16,567
Gastroenterology Physician Providers in US
54
States with Gastroenterology Physician
833
Avg Claims per Provider
Thomas Nowak, MD's 932 claims are above the specialty average of 833.
Nearby Gastroenterology Physician Providers in Indiana
Other clinicians with the same primary specialty enrolled in Indiana, drawn from the same CMS NPPES roster as Nowak.
Dr. Khaled Abdeljawad
M.D
Indianapolis, IN
Dr. Amarnath Agrawal
M.D.
Chesterton, IN
Dr. Furqan Ahmed
M.D.
Indianapolis, IN
Dr. Kashif Ahmed
MD
Indianapolis, IN
Dr. Moiz Ahmed
M.D.
Indianapolis, IN
Compare Gastroenterology Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Indiana medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Gastroenterology Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Thomas Nowak, MD's specialty? ▼
Thomas Nowak, MD specializes in Gastroenterology Physician and practices in Indianapolis, Indiana. Credentials: MD.
How much does Thomas Nowak, MD prescribe under Medicare Part D? ▼
In 2023, Thomas Nowak, MD wrote 932 Medicare Part D claims totaling $806K in drug costs for 225 beneficiaries.
Where is Thomas Nowak, MD located? ▼
Thomas Nowak, MD is located at 1701 N SENATE BLVD, Indianapolis, IN, 46202. Phone: (888) 484-3258.
What is Thomas Nowak, MD's NPI number? ▼
Thomas Nowak, MD's National Provider Identifier (NPI) is 1891876785, issued on 10/18/2006.
How many Gastroenterology Physician providers are there in the US? ▼
There are 16,567 Gastroenterology Physician providers across 54 states in the US. The average Gastroenterology Physician provider writes 833 Medicare Part D claims per year.
What drugs does Thomas Nowak, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Thomas Nowak, MD's most frequently prescribed drugs include Promethazine Hcl, Famotidine, Omeprazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Thomas Nowak, MD accept Medicare? ▼
Thomas Nowak, MD appears in CMS Medicare data with 932 Part D claims and 225 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Thomas Nowak, MD's credentials? ▼
Thomas Nowak, MD's NPI is 1891876785 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 (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
Compiled from official public sources by the PlainDoctor editorial team.