Dr. Nathan R. Tiwari, MD
- Medicare services, 2024
- 57
- Medicare patients, 2024
- 55
- Part D claims, 2024
- 72
- Hospital affiliations
- 1
- Industry payments
- $41
- Practice address
- 23019 Highway 149, Sigourney, IA 52591
- Practice phone
- Call (641) 622-2720
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Tiwari's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Nathan R. Tiwari is an emergency medicine physician in Sigourney, Iowa
Dr. Tiwari practices at Keokuk County Hospital & Clinics in Sigourney, Iowa, part of State of Iowa.
Dr. Tiwari's NPI, 1609185263, was assigned on September 30, 2010. Dr. Tiwari holds Iowa license MD-44379.
- NPI
- 1609185263NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8628219169
- NPI enumeration date
- September 30, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (641) 622-2720
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 42
- Medical school graduation
- 2010
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Nathan R. Tiwari practices at Keokuk County Hospital & Clinics in Sigourney, Iowa
Dr. Tiwari's primary practice is Keokuk County Hospital & Clinics, at 23019 Highway 149, Sigourney, IA 52591 in Keokuk County. The practice phone is (641) 622-2720.
- Keokuk County Hospital & Clinics23019 Highway 149, Sigourney, IA 52591 · Keokuk CountyPhone(641) 622-2720
Source: Dmand AI Affiliation Data
Dr. Nathan R. Tiwari is affiliated with 2 sites of care and 3 medical groups
Dr. Tiwari's primary practice is Keokuk County Hospital & Clinics in Sigourney, Iowa, part of State of Iowa. The medical group on file is Keokuk County Hospital & Clinics. Dmand AI also links Dr. Tiwari to 2 more medical groups and 1 group practice or clinic, each named with a free account. Dr. Tiwari's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Nathan R. Tiwari's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Tiwari practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Keokuk County Hospital & Clinics | Available with a free account |
| +1 more site and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Nathan R. Tiwari is one of 436 emergency medicine physicians in Iowa
Emergency medicine is Dr. Tiwari's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dmand AI has Dr. Tiwari's licenses on file in 2 states: Iowa and Minnesota.
Specialties and state licenses
- Emergency medicine, IowaPrimary
- Family medicine, Minnesota
Emergency medicine physicians near Dr. Tiwari
Counts of emergency medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Nathan R. Tiwari billed Medicare for 57 services in 2024
CMS data shows 57 Medicare services from Dr. Tiwari across 3 procedure codes in 2024, for 55 Medicare patients. Medicare paid $4,122 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Tiwari's Medicare services by type, 2021 to 2024
- 2021
- 2024
- Office and hospital visits
- 2021: 162024: 57256%
Dr. Tiwari compared with the Iowa median for emergency medicine physicians, 2024
- Dr. Tiwari
- Iowa median
- Medicare services
- 57vs 23676% below
- Medicare patients
- 55vs 23977% below
- Part D claims
- 154vs 602.6 times
Medians across 447 emergency medicine physicians in Iowa with Dmand AI profiles that report each measure.
Dr. Tiwari's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Tiwari and other emergency medicine physicians in Iowa.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Nathan R. Tiwari treated 55 Medicare patients in 2024, average age 79
CMS counts 55 Medicare patients who saw Dr. Tiwari in 2024. The largest group is 75 to 84, with 24 patients. 75% of them have high blood pressure, and 64% have high cholesterol. Their average risk score is 1.84, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Tiwari's median patient age at 51, with 54% women.
Dr. Tiwari's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Tiwari's Medicare patients by sex, 2024
- Women3971%
- Men1629%
Chronic conditions among Dr. Tiwari's Medicare patients, 2024
- High blood pressure75%
- High cholesterol64%
- Arthritis47%
- Chronic kidney disease45%
- Anxiety44%
- Heart failure40%
- Mood disorders38%
- Depression36%
Share of Medicare patients with each condition. A patient can have several.
Dr. Tiwari's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 51
Patient panel by sex, all payers
- Women54%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Nathan R. Tiwari wrote 72 Medicare Part D claims in 2024
In 2024, Dr. Tiwari wrote 72 Medicare Part D claims for 46 patients. 90% of them were for generic drugs. They cover 10 drugs, with $11,020 in total drug cost. In 2021, CMS named 3,216 claims across 86 drugs.
Dr. Tiwari's Part D claims by kind of drug, 2024
- Generic65 claims90%
- Brand-name and other7 claims10%
Dr. Tiwari's most prescribed drugs by claims, 2022
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Tiwari's Part D claims, 2024
- Antibiotics43%31 of 72 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2021 to 2022
- 2021
- 2022
- Claims for drugs CMS names
- 2021: 3,2162022: 15495%
Drugs named by CMS: 10 in 2022, 86 in 2021.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Nathan R. Tiwari takes part in Medicare
Dr. Tiwari accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Nathan R. Tiwari received $41 in industry payments from 2018 to 2020
CMS Open Payments shows 3 general payments to Dr. Tiwari from 2 drug and device companies from 2018 to 2020. Food and beverage make up the largest share, 100% of the total. Novo Nordisk Inc paid the most, $28.
General payments to Dr. Tiwari by program year, 2018 to 2020
Companies that paid Dr. Tiwari the most, 2018 to 2020
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Nathan R. Tiwari's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Nathan R. Tiwari
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Nathan R. Tiwari's NPI number?
Dr. Nathan R. Tiwari's NPI number is 1609185263. It was assigned on September 30, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. Nathan R. Tiwari?
Dr. Nathan R. Tiwari is an emergency medicine physician in Sigourney, Iowa. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Nathan R. Tiwari practice?
Dr. Tiwari practices at 23019 Highway 149, Sigourney, IA 52591. Dr. Tiwari's primary practice is Keokuk County Hospital & Clinics in Sigourney, Iowa, part of State of Iowa. Dmand AI also links Dr. Tiwari to 2 medical groups and 1 group practice or clinic.
What is Dr. Nathan R. Tiwari's office phone number?
The practice phone on file for Dr. Tiwari is (641) 622-2720.
What is Dr. Nathan R. Tiwari's medical license number?
Dr. Tiwari holds Iowa license MD-44379, one of the licenses on file in 2 states.
Which states has Dr. Nathan R. Tiwari been licensed in?
Dmand AI has state licenses on file for Dr. Tiwari in Iowa and Minnesota.
Which hospitals is Dr. Nathan R. Tiwari affiliated with?
Dr. Tiwari practices at Keokuk County Hospital & Clinics in Sigourney, Iowa.
What medical group is Dr. Nathan R. Tiwari part of?
Dr. Tiwari is linked to Keokuk County Hospital & Clinics. Dmand AI links Dr. Tiwari to 2 more medical groups.
Does Dr. Nathan R. Tiwari accept Medicare?
Yes. CMS data shows Dr. Tiwari billed Medicare for 57 services in 2024, and Dr. Tiwari accepts Medicare assignment.
How many Medicare patients does Dr. Nathan R. Tiwari see?
CMS counts 55 Medicare patients who saw Dr. Tiwari in 2024, with an average age of 79.
Show 4 more questionsShow fewer questions
What services does Dr. Nathan R. Tiwari bill to Medicare?
In 2024, Dr. Tiwari's most billed Medicare services were hospital inpatient care (99222), hospital inpatient care (99232) and hospital inpatient care (99238).
What drugs does Dr. Nathan R. Tiwari prescribe most?
In 2022 Medicare Part D data, Dr. Tiwari's most prescribed drugs by claims were Omeprazole, Gabapentin and Amlodipine Besylate.
Has Dr. Nathan R. Tiwari received payments from drug or device companies?
CMS Open Payments shows $41 in general payments to Dr. Tiwari from 2 companies from 2018 to 2020. The largest total came from Novo Nordisk Inc.
How long has Dr. Nathan R. Tiwari been practicing?
Dr. Tiwari graduated from medical school in 2010, 16 years ago.
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