Zachary Rynerson, M.D
NPI 1326488685 · Emergency Medicine Physician · Greenville, IL
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Zachary Rynerson, M.D is a Emergency Medicine Physician provider in Greenville, IL (NPI 1326488685).
Provider details
- NPI number
- 1326488685
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D
- Sex
- Male
- Sole proprietor
- No
- License
- 036.140646 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
13 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
505 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 438 | $171 |
| Critical Care, First 30-74 Minutes99291 | 36 | $207 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 31 | $118 |
Typical Medicare-allowed amounts for these services range $118–$207 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 50 | 50 |
| Ondansetronbrand: Ondansetron Odt | 28 | 28 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 21 | 20 |
| Cephalexin | 20 | 20 |
| Azithromycin | 20 | 19 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 18 | 18 |
Practice location
Mailing address
Additional practice locations (1)
- 3635 Vista AveSaint Louis University Hospital E.m AdministrationSaint Louis, MO 63110Phone: (314) 577-8780
Registry dates
- Enumerated
- 2013-07-01
- Last updated
- 2019-05-10
Frequently asked questions
- What is Zachary Rynerson's NPI number?
- Zachary Rynerson's National Provider Identifier (NPI) is 1326488685, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Zachary Rynerson's specialty?
- Zachary Rynerson is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Zachary Rynerson located?
- Zachary Rynerson's practice location on file with NPPES is 200 Health Care Dr, Greenville, IL 62246-1154.
- What is Zachary Rynerson's phone number?
- The practice phone number listed in the NPPES registry for Zachary Rynerson is (618) 664-1230.
- Does Zachary Rynerson accept Medicare?
- Zachary Rynerson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Zachary Rynerson's NPI active?
- Yes — Zachary Rynerson's NPI (1326488685) is active in the NPPES registry as of the last update on 2019-05-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.