Dr. Zachary D. Rynerson, MD
- Medicare services, 2024
- 505
- Medicare patients, 2024
- 467
- Part D claims, 2024
- 424
- MIPS score, 2024
- 87
- Hospital affiliations
- 2
- Practice address
- 1015 Bowles, Fenton, MO 63026
- Practice phone
- Call (636) 496-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Rynerson's professional email, personal email and mobile number
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Dr. Zachary D. Rynerson is an emergency medicine physician in Fenton, Missouri
Dr. Rynerson practices at SSM Health St. Clare Hospital - Fenton in Fenton, Missouri, part of SSM Health Care.
Dr. Rynerson's NPI, 1326488685, was assigned on July 1, 2013. Dr. Rynerson holds Illinois license 036.140646.
- NPI
- 1326488685NPI Registry (opens in a new tab)
- NPI enumeration date
- July 1, 2013
- NPI status
- Active
- Practice phone
- (636) 496-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Zachary D. Rynerson practices at SSM Health St. Clare Hospital - Fenton in Fenton, Missouri
Dr. Rynerson's primary practice is SSM Health St. Clare Hospital - Fenton, at 1015 Bowles, Fenton, MO 63026 in Jefferson County. The practice phone is (636) 496-2000.
- SSM Health St. Clare Hospital - Fenton1015 Bowles, Fenton, MO 63026 · Jefferson CountyPhone(636) 496-2000
Source: Dmand AI Affiliation Data
Dr. Zachary D. Rynerson is affiliated with 3 sites of care and 3 medical groups
Dr. Rynerson's primary practice is SSM Health St. Clare Hospital - Fenton in Fenton, Missouri, part of SSM Health Care. Dr. Rynerson is also affiliated with HSHS Holy Family Hospital. The medical group on file is CEP America. Dmand AI also links Dr. Rynerson to 2 more medical groups and 1 hospital outpatient department, 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 D. Rynerson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Rynerson practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| SSM Health St. Clare Hospital - Fenton | 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. Zachary D. Rynerson is one of 1,063 emergency medicine physicians in Missouri
Emergency medicine is Dr. Rynerson's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dmand AI has Dr. Rynerson's licenses on file in 2 states: Illinois and Missouri.
Specialties and state licenses
- Emergency medicine, IllinoisPrimary
- Missouri license
Emergency medicine physicians near Dr. Rynerson
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 D. Rynerson billed Medicare for 505 services in 2024
CMS data shows 505 Medicare services from Dr. Rynerson across 3 procedure codes in 2024, for 467 Medicare patients. Medicare paid $67,497 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Rynerson's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5402024: 5056%
Dr. Rynerson compared with the Missouri median for emergency medicine physicians, 2024
- Dr. Rynerson
- Missouri median
- Medicare services
- 505vs 2522.0 times
- Medicare patients
- 467vs 26278% above
- Part D claims
- 237vs 693.4 times
Medians across 1,092 emergency medicine physicians in Missouri with Dmand AI profiles that report each measure.
Dr. Rynerson'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Zachary D. Rynerson treated 467 Medicare patients in 2024, average age 75
CMS counts 467 Medicare patients who saw Dr. Rynerson in 2024. The largest group is 65 to 74, with 158 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 18% are also on Medicaid. Their average risk score is 2.37, 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. Rynerson's median patient age at 67, with 54% women.
Dr. Rynerson's Medicare patients by age, 2024
Dr. Rynerson's Medicare patients by sex, 2024
- Women26757%
- Men20043%
Chronic conditions among Dr. Rynerson's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis59%
- Chronic kidney disease49%
- Mood disorders49%
- Depression46%
- Heart failure46%
- Ischemic heart disease46%
Share of Medicare patients with each condition. A patient can have several.
Dr. Rynerson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women54%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Zachary D. Rynerson wrote 424 Medicare Part D claims in 2024
In 2024, Dr. Rynerson wrote 424 Medicare Part D claims for 225 patients. 95% of them were for generic drugs. CMS names the drug for 237 of them, across 12 drugs with 11 or more claims each, at $1,429 in total drug cost. In 2023, CMS named 380 claims across 14 drugs.
Dr. Rynerson's Part D claims by kind of drug, 2024
- Generic403 claims95%
- Brand-name and other21 claims5%
Dr. Rynerson'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. Rynerson's Part D claims, 2024
- Opioids19%79 of 424 claims
- Antibiotics30%129 of 424 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: 3802024: 23738%
Drugs named by CMS: 12 in 2024, 14 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. Zachary D. Rynerson scored 87 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 87 out of 100 for Dr. Rynerson for performance year 2024, reported as part of a group.
Dr. Rynerson's MIPS scores, performance year 2024
- 87of 100Final score
- 70.9of 100Quality
- 40of 100Improvement Activities
- 93of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Sources for Dr. Zachary D. Rynerson'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 | Clinician Public Reporting: Overall MIPS Performance (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 D. Rynerson
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 D. Rynerson's NPI number?
Dr. Zachary D. Rynerson's NPI number is 1326488685. It was assigned on July 1, 2013, and it is active in the NPI Registry.
What kind of doctor is Dr. Zachary D. Rynerson?
Dr. Zachary D. Rynerson is an emergency medicine physician in Fenton, Missouri. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Zachary D. Rynerson practice?
Dr. Rynerson practices at 1015 Bowles, Fenton, MO 63026. Dr. Rynerson's primary practice is SSM Health St. Clare Hospital - Fenton in Fenton, Missouri, part of SSM Health Care. Dmand AI also links Dr. Rynerson to 2 medical groups and 1 hospital outpatient department.
What is Dr. Zachary D. Rynerson's office phone number?
The practice phone on file for Dr. Rynerson is (636) 496-2000.
What is Dr. Zachary D. Rynerson's medical license number?
Dr. Rynerson holds Illinois license 036.140646, one of the licenses on file in 2 states.
Which states has Dr. Zachary D. Rynerson been licensed in?
Dmand AI has state licenses on file for Dr. Rynerson in Illinois and Missouri.
Which hospitals is Dr. Zachary D. Rynerson affiliated with?
Dr. Rynerson practices at SSM Health St. Clare Hospital - Fenton in Fenton, Missouri. Dr. Rynerson is also affiliated with HSHS Holy Family Hospital.
What medical group is Dr. Zachary D. Rynerson part of?
Dr. Rynerson is linked to CEP America. Dmand AI links Dr. Rynerson to 2 more medical groups.
Does Dr. Zachary D. Rynerson accept Medicare?
Yes. CMS data shows Dr. Rynerson billed Medicare for 505 services in 2024.
What is Dr. Zachary D. Rynerson's MIPS score?
Dr. Rynerson's MIPS final score for performance year 2024 is 87 out of 100, reported as part of a group.
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How many Medicare patients does Dr. Zachary D. Rynerson see?
CMS counts 467 Medicare patients who saw Dr. Rynerson in 2024, with an average age of 75.
What services does Dr. Zachary D. Rynerson bill to Medicare?
In 2024, Dr. Rynerson's most billed Medicare services were emergency department visit (99285), critical care (99291) and emergency department visit (99284).
What drugs does Dr. Zachary D. Rynerson prescribe most?
In 2024 Medicare Part D data, Dr. Rynerson's most prescribed drugs by claims were Hydrocodone-Acetaminophen, Ondansetron ODT and Amoxicillin-Clavulanate Potass.
How long has Dr. Zachary D. Rynerson been practicing?
Dr. Rynerson's NPI was assigned in 2013.
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