Dr. Zachary Armstrong, MD
- Part D claims, 2024
- 177
- Hospital affiliations
- 4
- Medical groups
- 2
- State license
- 1
- Year NPI issued
- 2022
- Practice address
- 801 N State St, Greenfield, IN 46140
- Practice phone
- Call (317) 462-5544
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Armstrong'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 Armstrong is an emergency medicine physician in Greenfield, Indiana
Dr. Armstrong practices at Hancock Regional Hospital in Greenfield, Indiana, part of Hancock Health.
Dr. Armstrong's NPI, 1396475976, was assigned on June 15, 2022. Dr. Armstrong holds Michigan license 4351050119.
- NPI
- 1396475976NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1052790631
- NPI enumeration date
- June 15, 2022
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (317) 462-5544
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 31
- Medical school graduation
- 2021
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Zachary Armstrong practices at Hancock Regional Hospital in Greenfield, Indiana
Dr. Armstrong's primary practice is Hancock Regional Hospital, at 801 N State St, Greenfield, IN 46140 in Hancock County. The practice phone is (317) 462-5544.
- Hancock Regional Hospital801 N State St, Greenfield, IN 46140 · Hancock CountyPhone(317) 462-5544
Source: Dmand AI Affiliation Data
Dr. Zachary Armstrong is affiliated with 5 sites of care and 2 medical groups
Dr. Armstrong's primary practice is Hancock Regional Hospital in Greenfield, Indiana, part of Hancock Health. Dr. Armstrong is also affiliated with ProMedica Monroe Regional Hospital. The medical group on file is Vituity. Dmand AI also links Dr. Armstrong to 2 more hospitals, 1 clinical lab and 1 medical group, 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 Armstrong's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Armstrong practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Hancock Regional Hospital | Available with a free account |
| +4 more sites and 1 medical group | 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 Hancock Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Zachary Armstrong is one of 1,275 emergency medicine physicians in Indiana
Emergency medicine is Dr. Armstrong's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Armstrong is licensed in Michigan.
Specialties and state licenses
- Emergency medicine, MichiganPrimary
Emergency medicine physicians near Dr. Armstrong
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. Zachary Armstrong's patients have a median age of 47
Across all payers, Dmand AI patient panel data puts Dr. Armstrong's median patient age at 47, with 58% women.
Dr. Armstrong's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 47
Patient panel by sex, all payers
- Women58%
- Men40%
Source: Dmand AI Patient Panel Data
Dr. Zachary Armstrong wrote 177 Medicare Part D claims in 2024
In 2024, Dr. Armstrong wrote 177 Medicare Part D claims for 117 patients. 90% of them were for generic drugs. CMS names the drug for 82 of them, across 6 drugs with 11 or more claims each, at $416 in total drug cost. In 2023, CMS named 27 claims across 2 drugs.
Dr. Armstrong's Part D claims by kind of drug, 2024
- Generic160 claims90%
- Brand-name17 claims10%
Dr. Armstrong'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. Armstrong's Part D claims, 2024
- Opioids10%18 of 177 claims
- Antibiotics32%56 of 177 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, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 272024: 82204%
Drugs named by CMS: 6 in 2024, 2 in 2023.
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 Armstrong takes part in Medicare
Dr. Armstrong 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)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Sources for Dr. Zachary Armstrong'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) |
| 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 Armstrong
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 Armstrong's NPI number?
Dr. Zachary Armstrong's NPI number is 1396475976. It was assigned on June 15, 2022, and it is active in the NPI Registry.
What kind of doctor is Dr. Zachary Armstrong?
Dr. Zachary Armstrong is an emergency medicine physician in Greenfield, Indiana. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Zachary Armstrong practice?
Dr. Armstrong practices at 801 N State St, Greenfield, IN 46140. Dr. Armstrong's primary practice is Hancock Regional Hospital in Greenfield, Indiana, part of Hancock Health. Dmand AI also links Dr. Armstrong to 2 hospitals, 1 clinical lab and 1 medical group.
What is Dr. Zachary Armstrong's office phone number?
The practice phone on file for Dr. Armstrong is (317) 462-5544.
What is Dr. Zachary Armstrong's medical license number?
Dr. Armstrong holds Michigan license 4351050119.
Which hospitals is Dr. Zachary Armstrong affiliated with?
Dr. Armstrong practices at Hancock Regional Hospital in Greenfield, Indiana. Dr. Armstrong is also affiliated with ProMedica Monroe Regional Hospital. Dmand AI links Dr. Armstrong to 2 more hospitals.
What medical group is Dr. Zachary Armstrong part of?
Dr. Armstrong is linked to Vituity. Dmand AI links Dr. Armstrong to 1 more medical group.
Does Dr. Zachary Armstrong accept Medicare?
Yes. CMS lists Dr. Armstrong as accepting Medicare assignment.
What drugs does Dr. Zachary Armstrong prescribe most?
In 2024 Medicare Part D data, Dr. Armstrong's most prescribed drugs by claims were Ibuprofen, Cephalexin and Amoxicillin-Clavulanate Potass.
How long has Dr. Zachary Armstrong been practicing?
Dr. Armstrong graduated from medical school in 2021, 5 years ago.
Selling to emergency medicine practices?
See emergency medicine physicians in Indiana by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card