Dr. Zachary S. Fuller, DO
- Part D claims, 2024
- 326
- Hospital affiliations
- 5
- Industry payments
- $5
- Medical groups
- 6
- State license
- 1
- 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. Fuller'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. Zachary S. Fuller is an internist in Mason City, Iowa
Dr. Fuller practices at MercyOne North Iowa Medical Center in Mason City, Iowa, part of Trinity Health.
Dr. Fuller's NPI, 1770272031, was assigned on May 3, 2023. Dr. Fuller holds Iowa license DO-06810.
- NPI
- 1770272031NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6507226263
- NPI enumeration date
- May 3, 2023
- 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
- Male
- Estimated age
- 29
- Medical school graduation
- 2023
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Zachary S. Fuller practices at MercyOne North Iowa Medical Center in Mason City, Iowa
Dr. Fuller'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. Zachary S. Fuller is affiliated with 8 sites of care and 6 medical groups
Dr. Fuller's primary practice is MercyOne North Iowa Medical Center in Mason City, Iowa, part of Trinity Health. Dr. Fuller is also affiliated with Jefferson County Health Center. The medical group on file is MercyOne North Iowa Anesthesia Professional Services. Dmand AI also links Dr. Fuller to 3 more hospitals, 5 medical groups, 2 group practices and clinics 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. Zachary S. Fuller's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Fuller practices, 8 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 |
| +7 more sites and 5 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Trinity Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Zachary S. Fuller is one of 726 internists in Iowa
Internal medicine is Dr. Fuller's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Fuller is licensed in Iowa.
Specialties and state licenses
- Internal medicine, IowaPrimary
Internists near Dr. Fuller
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. Zachary S. Fuller's patients have a median age of 72
Across all payers, Dmand AI patient panel data puts Dr. Fuller's median patient age at 72, with 55% women.
Dr. Fuller's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women55%
- Men45%
Source: Dmand AI Patient Panel Data
Dr. Zachary S. Fuller wrote 326 Medicare Part D claims in 2024
In 2024, Dr. Fuller wrote 326 Medicare Part D claims for 106 patients. 87% of them were for generic drugs. CMS names the drug for 84 of them, across 6 drugs with 11 or more claims each, at $10,523 in total drug cost.
Dr. Fuller's Part D claims by kind of drug, 2024
- Generic285 claims87%
- Brand-name and other41 claims13%
Dr. Fuller's most prescribed drugs by claims, 2024
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. Fuller's Part D claims, 2024
- Antibiotics11%35 of 326 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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. Zachary S. Fuller takes part in Medicare
Dr. Fuller 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. Zachary S. Fuller received $5 in industry payments in 2025
CMS Open Payments shows 1 general payment to Dr. Fuller from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) paid the most, $5.
Companies that paid Dr. Fuller the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Zachary S. Fuller'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 patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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. Zachary S. Fuller
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. Zachary S. Fuller's NPI number?
Dr. Zachary S. Fuller's NPI number is 1770272031. It was assigned on May 3, 2023, and it is active in the NPI Registry.
What kind of doctor is Dr. Zachary S. Fuller?
Dr. Zachary S. Fuller is an internist in Mason City, Iowa. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Zachary S. Fuller practice?
Dr. Fuller practices at 1000 Fourth Street SW, Mason City, IA 50401. Dr. Fuller's primary practice is MercyOne North Iowa Medical Center in Mason City, Iowa, part of Trinity Health. Dmand AI also links Dr. Fuller to 3 hospitals, 5 medical groups, 2 group practices and clinics and 1 hospice.
What is Dr. Zachary S. Fuller's office phone number?
The practice phone on file for Dr. Fuller is (641) 428-7000.
What is Dr. Zachary S. Fuller's medical license number?
Dr. Fuller holds Iowa license DO-06810.
Which hospitals is Dr. Zachary S. Fuller affiliated with?
Dr. Fuller practices at MercyOne North Iowa Medical Center in Mason City, Iowa. Dr. Fuller is also affiliated with Jefferson County Health Center. Dmand AI links Dr. Fuller to 3 more hospitals.
What medical group is Dr. Zachary S. Fuller part of?
Dr. Fuller is linked to MercyOne North Iowa Anesthesia Professional Services. Dmand AI links Dr. Fuller to 5 more medical groups.
Does Dr. Zachary S. Fuller accept Medicare?
Yes. CMS lists Dr. Fuller as accepting Medicare assignment.
What drugs does Dr. Zachary S. Fuller prescribe most?
In 2024 Medicare Part D data, Dr. Fuller's most prescribed drugs by claims were Atorvastatin Calcium, Losartan Potassium and Furosemide.
Has Dr. Zachary S. Fuller received payments from drug or device companies?
CMS Open Payments shows $5 in general payments to Dr. Fuller from 1 company from 2025 to 2025. The largest total came from ZOLL Services LLC (A/K/A ZOLL LifeCor Corp).
How long has Dr. Zachary S. Fuller been practicing?
Dr. Fuller graduated from medical school in 2023, 3 years ago.
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