Dr. Steven T. Zierer, MD
- Medicare services, 2024
- 170
- Medicare patients, 2024
- 166
- Part D claims, 2024
- 482
- Hospital affiliations
- 1
- Industry payments
- $10,988
- Practice address
- 310 Sunnyview Lane, Kalispell, MT 59901
- Practice phone
- Call (406) 752-5111
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Zierer'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. Steven T. Zierer is a gastroenterologist in Kalispell, Montana
Dr. Zierer practices at Logan Health Medical Center in Kalispell, Montana, part of Billings Clinic.
Dr. Zierer's NPI, 1366437337, was assigned on September 15, 2005. Dr. Zierer graduated from Indiana University School of Medicine in 1989. Dr. Zierer holds Arizona license 20445.
- NPI
- 1366437337NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5294639712
- NPI enumeration date
- September 15, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (406) 752-5111
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 63
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Steven T. Zierer practices at Logan Health Medical Center in Kalispell, Montana
Dr. Zierer's primary practice is Logan Health Medical Center, at 310 Sunnyview Lane, Kalispell, MT 59901 in Flathead County. The practice phone is (406) 752-5111.
- Logan Health Medical Center310 Sunnyview Lane, Kalispell, MT 59901 · Flathead CountyPhone(406) 752-5111
Source: Dmand AI Affiliation Data
Dr. Steven T. Zierer is affiliated with 3 sites of care and 3 medical groups
Dr. Zierer's primary practice is Logan Health Medical Center in Kalispell, Montana, part of Billings Clinic. The medical group on file is Arizona Digestive Health. Dmand AI also links Dr. Zierer to 2 more group practices and clinics and 2 medical groups, 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. Steven T. Zierer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Zierer practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Logan Health Medical Center | Available with a free account |
| +2 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Steven T. Zierer is one of 40 gastroenterologists in Montana
Gastroenterology is Dr. Zierer's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dmand AI has Dr. Zierer's licenses on file in 2 states: Arizona and Montana.
Specialties and state licenses
- Gastroenterology, ArizonaPrimary
- Montana license
Gastroenterologists near Dr. Zierer
Counts of gastroenterologists 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. Steven T. Zierer billed Medicare for 170 services in 2024
CMS data shows 170 Medicare services from Dr. Zierer across 8 procedure codes in 2024, for 166 Medicare patients. Medicare paid $13,691 for them.
Dr. Zierer's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 6932024: 11983%
- Surgery
- 2023: 3012024: 3788%
- Other services
- 2023: 962024: 1485%
- Tests and treatments
- 2023: 152024: 0100%
Where Dr. Zierer's Medicare services took place, 2024
- In an office9254%
- In a facility7846%
Dr. Zierer compared with the Montana median for gastroenterologists, 2024
- Dr. Zierer
- Montana median
- Medicare services
- 170vs 48065% below
- Medicare patients
- 166vs 44863% below
- Part D claims
- 359vs 24447% above
Medians across 44 gastroenterologists in Montana with Dmand AI profiles that report each measure.
Dr. Zierer'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. Zierer and other gastroenterologists in Montana.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Steven T. Zierer treated 166 Medicare patients in 2024, average age 76
CMS counts 166 Medicare patients who saw Dr. Zierer in 2024. The largest group is 65 to 74, with 74 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.50, 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. Zierer's median patient age at 69, with 41% women.
Dr. Zierer's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Zierer's Medicare patients by sex, 2024
- Women8451%
- Men8249%
Chronic conditions among Dr. Zierer's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis55%
- Ischemic heart disease34%
- Chronic kidney disease33%
- Mood disorders33%
- Depression31%
- Cancer28%
Share of Medicare patients with each condition. A patient can have several.
Dr. Zierer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women41%
- Men55%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Steven T. Zierer wrote 482 Medicare Part D claims in 2024
In 2024, Dr. Zierer wrote 482 Medicare Part D claims for 191 patients. 89% of them were for generic drugs. CMS names the drug for 359 of them, across 7 drugs with 11 or more claims each, at $17,446 in total drug cost. In 2023, CMS named 1,060 claims across 21 drugs.
Dr. Zierer's Part D claims by kind of drug, 2024
- Generic430 claims89%
- Brand-name52 claims11%
Dr. Zierer'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. Zierer's Part D claims, 2024
- Antibiotics2%11 of 482 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: 1,0602024: 35966%
Drugs named by CMS: 7 in 2024, 21 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
Dr. Steven T. Zierer ranks in the 42nd percentile for upper gastrointestinal (gi) endoscopy for acid reflux in Medicare
Dr. Zierer accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 11 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Zierer, more than 42% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Zierer ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 42nd percentile11 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Steven T. Zierer received $10,988 in industry payments from 2016 to 2024
CMS Open Payments shows 612 general payments to Dr. Zierer from 41 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 99% of the total. Abbvie Inc. paid the most, $3,016.
General payments to Dr. Zierer by program year, 2016 to 2024
General payments to Dr. Zierer by kind, 2016 to 2024
- Food and beverage$10,88299%
- Education$1051%
Companies that paid Dr. Zierer the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Steven T. Zierer graduated from Indiana University School of Medicine
Dr. Zierer graduated from Indiana University School of Medicine in 1989.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Steven T. Zierer'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)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Steven T. Zierer
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. Steven T. Zierer's NPI number?
Dr. Steven T. Zierer's NPI number is 1366437337. It was assigned on September 15, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Steven T. Zierer?
Dr. Steven T. Zierer is a gastroenterologist in Kalispell, Montana. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Steven T. Zierer practice?
Dr. Zierer practices at 310 Sunnyview Lane, Kalispell, MT 59901. Dr. Zierer's primary practice is Logan Health Medical Center in Kalispell, Montana, part of Billings Clinic. Dmand AI also links Dr. Zierer to 2 group practices and clinics and 2 medical groups.
What is Dr. Steven T. Zierer's office phone number?
The practice phone on file for Dr. Zierer is (406) 752-5111.
What is Dr. Steven T. Zierer's medical license number?
Dr. Zierer holds Arizona license 20445, one of the licenses on file in 2 states.
Which states has Dr. Steven T. Zierer been licensed in?
Dmand AI has state licenses on file for Dr. Zierer in Arizona and Montana.
Which hospitals is Dr. Steven T. Zierer affiliated with?
Dr. Zierer practices at Logan Health Medical Center in Kalispell, Montana.
What medical group is Dr. Steven T. Zierer part of?
Dr. Zierer is linked to Arizona Digestive Health. Dmand AI links Dr. Zierer to 2 more medical groups.
Does Dr. Steven T. Zierer accept Medicare?
Yes. CMS data shows Dr. Zierer billed Medicare for 170 services in 2024, and Dr. Zierer accepts Medicare assignment.
How many Medicare patients does Dr. Steven T. Zierer see?
CMS counts 166 Medicare patients who saw Dr. Zierer in 2024, with an average age of 76.
Show 5 more questionsShow fewer questions
What services does Dr. Steven T. Zierer bill to Medicare?
In 2024, Dr. Zierer's most billed Medicare services were office visit, established patient (99214), surgery: digestive system (43239) and hospital inpatient care (99232).
Where did Dr. Steven T. Zierer go to medical school?
Dr. Zierer graduated from Indiana University School of Medicine in 1989.
What drugs does Dr. Steven T. Zierer prescribe most?
In 2024 Medicare Part D data, Dr. Zierer's most prescribed drugs by claims were Pantoprazole Sodium, Famotidine and Omeprazole.
Has Dr. Steven T. Zierer received payments from drug or device companies?
CMS Open Payments shows $10,988 in general payments to Dr. Zierer from 41 companies from 2016 to 2024. The largest total came from Abbvie Inc.
How long has Dr. Steven T. Zierer been practicing?
Dr. Zierer graduated from medical school in 1989, 37 years ago.
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