Dr. Amy L. Tesar, DO
- Medicare services, 2024
- 810
- Medicare patients, 2024
- 260
- Part D claims, 2021
- 43
- Publications
- 2
- MIPS score, 2024
- 82
- Practice address
- 1000 Fourth Street SW, Mason City, IA 50401
- Practice phone
- Call (641) 428-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Tesar'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. Amy L. Tesar is an internist in Mason City, Iowa
Dr. Tesar practices at MercyOne North Iowa Medical Center in Mason City, Iowa, part of Trinity Health.
Dr. Tesar's NPI, 1841307477, was assigned on August 23, 2006. Dr. Tesar holds Iowa license DO-03524.
- NPI
- 1841307477NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8527089580
- NPI enumeration date
- August 23, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (641) 428-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 50
- Medical school graduation
- 2002
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Amy L. Tesar practices at MercyOne North Iowa Medical Center in Mason City, Iowa
Dr. Tesar's primary practice is MercyOne North Iowa Medical Center, at 1000 Fourth Street SW, Mason City, IA 50401 in Cerro Gordo County. The practice phone is (641) 428-7000.
- MercyOne North Iowa Medical Center1000 Fourth Street SW, Mason City, IA 50401 · Cerro Gordo CountyPhone(641) 428-7000
Source: Dmand AI Affiliation Data
Dr. Amy L. Tesar is affiliated with 4 sites of care and 1 medical group
Dr. Tesar's primary practice is MercyOne North Iowa Medical Center in Mason City, Iowa, part of Trinity Health. Dr. Tesar is also affiliated with Franklin General Hospital. The medical group on file is MercyOne North Iowa Anesthesia Professional Services. Dmand AI also links Dr. Tesar to 1 more hospital and 1 hospice, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Amy L. Tesar's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Tesar practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| MercyOne North Iowa Medical Center | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Amy L. Tesar is one of 726 internists in Iowa
Internal medicine is Dr. Tesar's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Tesar is licensed in Iowa.
Specialties and state licenses
- Internal medicine, IowaPrimary
Internists near Dr. Tesar
Counts of internists 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. Amy L. Tesar billed Medicare for 810 services in 2024
CMS data shows 810 Medicare services from Dr. Tesar across 5 procedure codes in 2024, for 260 Medicare patients. Medicare paid $52,158 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Tesar's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,2352024: 81034%
Dr. Tesar compared with the Iowa median for internists, 2024
- Dr. Tesar
- Iowa median
- Medicare services
- 810vs 57441% above
- Medicare patients
- 260vs 260Close to median
- Part D claims
- 43vs 16774% below
Medians across 689 internists in Iowa with Dmand AI profiles that report each measure.
Dr. Tesar'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.
Need commercial claims for Dr. Tesar?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Tesar and other internists in Iowa.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Amy L. Tesar treated 260 Medicare patients in 2024, average age 80
CMS counts 260 Medicare patients who saw Dr. Tesar in 2024. The largest group is 75 to 84, with 97 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 13% are also on Medicaid. Their average risk score is 2.14, 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. Tesar's median patient age at 78, with 54% women.
Dr. Tesar's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Tesar's Medicare patients by sex, 2024
- Women14154%
- Men11946%
Chronic conditions among Dr. Tesar's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis59%
- Heart failure58%
- Ischemic heart disease54%
- Chronic kidney disease52%
- Mood disorders51%
- Depression49%
Share of Medicare patients with each condition. A patient can have several.
Dr. Tesar's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 78
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. Amy L. Tesar wrote 43 Medicare Part D claims in 2021
In 2021, Dr. Tesar wrote 43 Medicare Part D claims. Every claim was for a generic drug. They cover 3 drugs, with $749 in total drug cost. In 2020, CMS named 255 claims across 14 drugs.
Dr. Tesar's most prescribed drugs by claims, 2021
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2020 to 2021
- 2020
- 2021
- Claims for drugs CMS names
- 2020: 2552021: 4383%
Drugs named by CMS: 3 in 2021, 14 in 2020.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
Dr. Amy L. Tesar scored 82 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 82 out of 100 for Dr. Tesar for performance year 2024, reported as part of a group. Dr. Tesar accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Tesar's MIPS scores, performance year 2024
- 82of 100Final score
- 73.9of 100Quality
- 93of 100Promoting Interoperability
- 40of 100Improvement Activities
- 70of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Amy L. Tesar has 2 publications on record
Dmand AI links 2 papers to Dr. Tesar, published from 2021 to 2022. Dr. Tesar has published most often in Cureus.
Recent publications by Dr. Tesar
See who Dr. Tesar researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Tesar works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Amy L. Tesar received $43 in industry payments in 2018
CMS Open Payments shows 1 general payment to Dr. Tesar from 1 drug or device company in 2018. Food and beverage make up the largest share, 100% of the total. Pfizer Inc. paid the most, $43.
Companies that paid Dr. Tesar the most, 2018 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Amy L. Tesar'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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Amy L. Tesar
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. Amy L. Tesar's NPI number?
Dr. Amy L. Tesar's NPI number is 1841307477. It was assigned on August 23, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Amy L. Tesar?
Dr. Amy L. Tesar is an internist in Mason City, Iowa. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Amy L. Tesar practice?
Dr. Tesar practices at 1000 Fourth Street SW, Mason City, IA 50401. Dr. Tesar's primary practice is MercyOne North Iowa Medical Center in Mason City, Iowa, part of Trinity Health. Dmand AI also links Dr. Tesar to 1 hospital and 1 hospice.
What is Dr. Amy L. Tesar's office phone number?
The practice phone on file for Dr. Tesar is (641) 428-7000.
What is Dr. Amy L. Tesar's medical license number?
Dr. Tesar holds Iowa license DO-03524.
Which hospitals is Dr. Amy L. Tesar affiliated with?
Dr. Tesar practices at MercyOne North Iowa Medical Center in Mason City, Iowa. Dr. Tesar is also affiliated with Franklin General Hospital. Dmand AI links Dr. Tesar to 1 more hospital.
What medical group is Dr. Amy L. Tesar part of?
Dr. Tesar is linked to MercyOne North Iowa Anesthesia Professional Services.
Does Dr. Amy L. Tesar accept Medicare?
Yes. CMS data shows Dr. Tesar billed Medicare for 810 services in 2024, and Dr. Tesar accepts Medicare assignment.
What is Dr. Amy L. Tesar's MIPS score?
Dr. Tesar's MIPS final score for performance year 2024 is 82 out of 100, reported as part of a group.
How many Medicare patients does Dr. Amy L. Tesar see?
CMS counts 260 Medicare patients who saw Dr. Tesar in 2024, with an average age of 80.
Show 5 more questionsShow fewer questions
What services does Dr. Amy L. Tesar bill to Medicare?
In 2024, Dr. Tesar's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99238) and hospital inpatient care (99223).
What drugs does Dr. Amy L. Tesar prescribe most?
In 2021 Medicare Part D data, Dr. Tesar's most prescribed drugs by claims were Omeprazole, Allopurinol and Levothyroxine Sodium.
Has Dr. Amy L. Tesar received payments from drug or device companies?
CMS Open Payments shows $43 in general payments to Dr. Tesar from 1 company from 2018 to 2018. The largest total came from Pfizer Inc.
How long has Dr. Amy L. Tesar been practicing?
Dr. Tesar graduated from medical school in 2002, 24 years ago.
Does Dr. Amy L. Tesar do research?
Dmand AI links 2 publications to Dr. Tesar, published from 2021 to 2022.
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