DR. STEVEN T ZIERER (M.D.) – Gastroenterology Physician, NPI 1366437337
Gastroenterology Physician
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Profile Insights
NPPES metrics only — not quality of care.
431 GASTROENTEROLOGY in AZ
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Provider Addresses for DR. STEVEN T ZIERER (M.D.)
Arizona Digestive Health, 6020, East Arbor Avenue, Buckhorn, Mesa, Maricopa County, Arizona, 85206, United States
SUITE 101
MESA, AZ 852066102
Phone: (480) 985-1700
Fax: (480) 396-3659
Type: Location
320 Sunnyview Ln
Kalispell, MT 599013129
Phone: (064) 752-7441
Fax: (406) 257-0304
Type: Location
3020, East Camelback Road, Biltmore Villas, Camelback East, Phoenix, Maricopa County, Arizona, 85016, United States
SUITE 301
PHOENIX, AZ 850145095
Phone: (602) 264-9100
Fax: (602) 264-9101
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 139 Open Payments records for all available years, with a total value of $2,510.
Total Amount is formed as General ($2,510) + Research ($0) + Ownership ($0) = $2,510.
Last reported payment date: 2024-08-05 • Largest payer in this snapshot: ABBVIE INC. ($707).
Total Amount
$2,510
General + Research + Ownership
Payments
139
Total payment records
General Amount
$2,510
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
2
Ownership records
Last Payment Date
2024-08-05
Latest reported date
Top Companies
Largest payers in this snapshot
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2024-06-24
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20080408000202 | I | Gastroenterology | AZ | TBD |
| I20240624003621 | I | Gastroenterology | MT | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 286 | 207 | $0 |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 122 | 122 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 87 | 87 | $0 |
| 45385 | Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 81 | 81 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 73 | 71 | $0 |
Insurance plans in this area (ZIP 85206)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | TX | |
| Infectious Disease, Internal Medicine | MT | |
| - | MT | |
| - | MT | |
| Internal Medicine | MT | |
| Cardiovascular Disease (Cardiology), Interventional Cardiology | MT | |
| Diagnostic Radiology | CA | |
| - | MT | |
| - | MT | |
| Family Practice | MT |
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