Administration, OralBrachial ArteryCoronary Disease
Dr. Diane Z. Greiner, MD
NPI1568462885
- Medicare services, 2021
- 1,598
- Part D claims, 2024
- 14
- Publications
- 1
- Hospital affiliations
- 1
- Industry payments
- $14
- Practice address
- 800 11th St, Charles City, IA 50616
- Practice phone
- Call (641) 228-6830
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Greiner'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. Diane Z. Greiner is a cardiologist in Charles City, Iowa
Dr. Greiner practices at Floyd County Medical Center in Charles City, Iowa, part of Floyd County Medical Center.
Dr. Greiner's NPI, 1568462885, was assigned on July 28, 2005. Dr. Greiner graduated from Duke University School Of Medicine in 1993. Dr. Greiner holds Texas license J6830.
NPI and contact details
- NPI
- 1568462885NPI Registry (opens in a new tab)
- NPI enumeration date
- July 28, 2005
- NPI status
- Active
- Practice phone
- (641) 228-6830
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Diane Z. Greiner practices at Floyd County Medical Center in Charles City, Iowa
Dr. Greiner's primary practice is Floyd County Medical Center, at 800 11th St, Charles City, IA 50616 in Floyd County. The practice phone is (641) 228-6830.
- Floyd County Medical Center800 11th St, Charles City, IA 50616 · Floyd CountyPhone(641) 228-6830
Source: Dmand AI Affiliation Data
Dr. Diane Z. Greiner is affiliated with 2 sites of care and 1 medical group
Dr. Greiner's primary practice is Floyd County Medical Center in Charles City, Iowa, part of Floyd County Medical Center. The medical group on file is Surgical Oncology Associates of South Texas. Dmand AI also links Dr. Greiner to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Diane Z. Greiner's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Greiner practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Floyd County Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dmand AI maps EHR vendors, IT decision makers and buying committees across Floyd County Medical Center and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Diane Z. Greiner is one of 166 cardiologists in Iowa
Cardiovascular disease is Dr. Greiner's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. Greiner is board certified in cardiovascular disease by the American Board of Internal Medicine. Dr. Greiner is licensed in Texas.
Specialties and state licenses
- Cardiovascular disease, TexasPrimary
Cardiologists near Dr. Greiner
Counts of cardiologists 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. Diane Z. Greiner billed Medicare for 1,598 services in 2021
CMS data shows 1,598 Medicare services from Dr. Greiner across 17 procedure codes in 2021. Medicare paid $125,062 for them.
Medicare services, 20211,598
Paid by Medicare$125,062
Procedure codes17
Dr. Greiner's Medicare services by type, 2020 to 2021
- 2020
- 2021
- Office and hospital visits
- 2020: 1,3102021: 70047%
- Tests and treatments
- 2020: 9252021: 53043%
- Drugs given in the office
- 2020: 2302021: 14836%
- Surgery
- 2020: 1472021: 7946%
- Other services
- 2020: 1752021: 7159%
- Imaging
- 2020: 1352021: 7048%
- Lab and pathology
- 2020: 1272021: 0100%
Where Dr. Greiner's Medicare services took place, 2021
- In an office1,28781%
- In a facility31119%
Dr. Greiner compared with the Iowa median for cardiologists, 2021
- Dr. Greiner
- Iowa median
- Medicare services
- 1,598vs 1,598Close to median
- Part D claims
- 85vs 1,13893% below
Medians across 174 cardiologists in Iowa with Dmand AI profiles that report each measure.
Dr. Greiner's most billed Medicare procedure codes, 2021
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. Greiner?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Greiner and other cardiologists in Iowa.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Diane Z. Greiner's patients have a median age of 72
Across all payers, Dmand AI patient panel data puts Dr. Greiner's median patient age at 72, with 33% women.
Dr. Greiner'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
- Women33%
- Men65%
Source: Dmand AI Patient Panel Data
Dr. Diane Z. Greiner wrote 14 Medicare Part D claims in 2024
In 2024, Dr. Greiner wrote 14 Medicare Part D claims. 100% of them were for generic drugs. They cover 6 drugs, with $13,014 in total drug cost. In 2021, CMS named 2,863 claims across 39 drugs.
Part D claims, 202414
Drugs named by CMS6
Total drug cost$13,014
Dr. Greiner'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.
Part D claims for drugs CMS names, 2021 to 2022
- 2021
- 2022
- Claims for drugs CMS names
- 2021: 2,8632022: 8597%
Drugs named by CMS: 6 in 2022, 39 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
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Dr. Diane Z. Greiner has 1 publication on record
Dmand AI links 1 paper to Dr. Greiner.
Papers1
Recent publications by Dr. Greiner
See who Dr. Greiner researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Greiner works with, so you can find a warm path to the right cardiologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Diane Z. Greiner received $14 in industry payments in 2017
CMS Open Payments shows 1 general payment to Dr. Greiner from 1 drug or device company in 2017. Food and beverage make up the largest share, 100% of the total. Allergan Inc. paid the most, $14.
Companies that paid Dr. Greiner the most, 2017 to 2017
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Diane Z. Greiner has 2 awards and honors on record
Dmand AI lists 2 awards for Dr. Greiner, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Greiner
- 2013
- CMS Stage 1 EHR
- Undated
- ACC Fellow
Source: Dmand AI Professional Profile Data
Dr. Diane Z. Greiner graduated from Duke University School Of Medicine
Dr. Greiner graduated from Duke University School Of Medicine in 1993. Dr. Greiner is a member of ACC.
- Medical school
- Board certified in cardiovascular disease
Source: Dmand AI Professional Profile Data
Dr. Diane Z. Greiner accepts plans from 15 insurance carriers
Dr. Greiner is in network with 15 carriers, including Elevance, Excellus BlueCross BlueShield and United Healthcare. HMO plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Elevance
- Excellus BlueCross BlueShield
- United Healthcare
- Aetna
- Alliant Health Plans
- HCSC
- Molina
- Baylor Scott and White
- +7 more carriersWith a free account
Plan types Dr. Greiner accepts, by number of carriers
- HMO10
- PPO8
- EPO4
- Medicare4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. Diane Z. Greiner'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 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) |
| 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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| 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. Diane Z. Greiner
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. Diane Z. Greiner's NPI number?
Dr. Diane Z. Greiner's NPI number is 1568462885. It was assigned on July 28, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Diane Z. Greiner?
Dr. Diane Z. Greiner is a cardiologist in Charles City, Iowa. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does Dr. Diane Z. Greiner practice?
Dr. Greiner practices at 800 11th St, Charles City, IA 50616. Dr. Greiner's primary practice is Floyd County Medical Center in Charles City, Iowa, part of Floyd County Medical Center. Dmand AI also links Dr. Greiner to 1 group practice or clinic.
What is Dr. Diane Z. Greiner's office phone number?
The practice phone on file for Dr. Greiner is (641) 228-6830.
What is Dr. Diane Z. Greiner's medical license number?
Dr. Greiner holds Texas license J6830.
Which hospitals is Dr. Diane Z. Greiner affiliated with?
Dr. Greiner practices at Floyd County Medical Center in Charles City, Iowa.
What medical group is Dr. Diane Z. Greiner part of?
Dr. Greiner is linked to Surgical Oncology Associates of South Texas.
Does Dr. Diane Z. Greiner accept Medicare?
Yes. CMS data shows Dr. Greiner billed Medicare for 1,598 services in 2021.
Is Dr. Diane Z. Greiner board certified?
Yes. Dr. Greiner is board certified in cardiovascular disease by the American Board of Internal Medicine.
What services does Dr. Diane Z. Greiner bill to Medicare?
In 2021, Dr. Greiner's most billed Medicare services were office visit, established patient (99214), heart test or procedure (93306) and hospital inpatient care (99232).
Show 6 more questionsShow fewer questions
Where did Dr. Diane Z. Greiner go to medical school?
Dr. Greiner graduated from Duke University School Of Medicine in 1993.
What drugs does Dr. Diane Z. Greiner prescribe most?
In 2022 Medicare Part D data, Dr. Greiner's most prescribed drugs by claims were Metoprolol Succinate, Atorvastatin Calcium and Eliquis.
Has Dr. Diane Z. Greiner received payments from drug or device companies?
CMS Open Payments shows $14 in general payments to Dr. Greiner from 1 company from 2017 to 2017. The largest total came from Allergan Inc.
How long has Dr. Diane Z. Greiner been practicing?
Dr. Greiner graduated from medical school in 1993, 33 years ago.
Does Dr. Diane Z. Greiner do research?
Dmand AI links 1 publication to Dr. Greiner.
What insurance does Dr. Diane Z. Greiner accept?
Dr. Greiner is in network with 15 carriers, including Elevance, Excellus BlueCross BlueShield and United Healthcare. HMO plans come from the most carriers, 10. Check the plan with the practice before a visit.
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