Dr. Ruth A. Decker, MD
- Medicare services, 2024
- 62
- Medicare patients, 2024
- 53
- Part D claims, 2024
- 79
- Hospital affiliations
- 2
- Industry payments
- $731
- Practice address
- 232 S Woods Mill Rd, Chesterfield, MO 63017
- Practice phone
- Call (314) 434-1500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Decker's professional email, personal email and mobile number
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Dr. Ruth A. Decker is a general surgeon in Chesterfield, Missouri
Dr. Decker practices at St. Luke's Hospital in Chesterfield, Missouri, part of St. Luke's Episcopal-Presbyterian Hospital.
Dr. Decker's NPI, 1538145552, was assigned on December 21, 2005. Dr. Decker graduated from University of Wisconsin School of Medicine in 1986. Dr. Decker holds Missouri license R6H10.
- NPI
- 1538145552NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0749378701
- NPI enumeration date
- December 21, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (314) 434-1500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 66
- Medical school graduation
- 1986
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ruth A. Decker practices at St. Luke's Hospital in Chesterfield, Missouri
Dr. Decker's primary practice is St. Luke's Hospital, at 232 S Woods Mill Rd, Chesterfield, MO 63017 in St. Louis County. The practice phone is (314) 434-1500.
- St. Luke's Hospital232 S Woods Mill Rd, Chesterfield, MO 63017 · St. Louis CountyPhone(314) 434-1500
Source: Dmand AI Affiliation Data
Dr. Ruth A. Decker is affiliated with 4 sites of care
Dr. Decker's primary practice is St. Luke's Hospital in Chesterfield, Missouri, part of St. Luke's Episcopal-Presbyterian Hospital. Dr. Decker is also affiliated with Barnes-Jewish West County Hospital. Dmand AI also links Dr. Decker to 1 more breast imaging center and 1 physician office, 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. Ruth A. Decker's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Decker practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| St. Luke's Hospital | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across St. Luke's Episcopal-Presbyterian Hospital and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Ruth A. Decker is one of 593 general surgeons in Missouri
Surgery is Dr. Decker's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Decker is licensed in Missouri.
Specialties and state licenses
- Surgery, MissouriPrimary
General surgeons near Dr. Decker
Counts of general surgeons 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. Ruth A. Decker billed Medicare for 62 services in 2024
CMS data shows 62 Medicare services from Dr. Decker across 4 procedure codes in 2024, for 53 Medicare patients. Medicare paid $12,505 for them.
Dr. Decker's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 322024: 5159%
- Surgery
- 2023: 132024: 1115%
Where Dr. Decker's Medicare services took place, 2024
- In an office5182%
- In a facility1118%
Dr. Decker compared with the Missouri median for general surgeons, 2024
- Dr. Decker
- Missouri median
- Medicare services
- 62vs 16963% below
- Medicare patients
- 53vs 12758% below
- Part D claims
- 52vs 4127% above
Medians across 570 general surgeons in Missouri with Dmand AI profiles that report each measure.
Dr. Decker'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. Ruth A. Decker treated 53 Medicare patients in 2024, average age 76
CMS counts 53 Medicare patients who saw Dr. Decker in 2024. The largest group is 65 to 74, with 27 patients. 75% of them have high cholesterol, and 70% have arthritis. Their average risk score is 0.96, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Decker's median patient age at 71, with 74% women.
Dr. Decker's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Dr. Decker's Medicare patients, 2024
- High cholesterol75%
- Arthritis70%
- High blood pressure64%
- Cancer23%
- Mood disorders23%
- Ischemic heart disease21%
- Osteoporosis21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Decker's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women74%
- Men26%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ruth A. Decker wrote 79 Medicare Part D claims in 2024
In 2024, Dr. Decker wrote 79 Medicare Part D claims for 35 patients. 76% of them were for generic drugs. CMS names the drug for 52 of them, across 2 drugs with 11 or more claims each, at $212 in total drug cost. In 2023, CMS named 61 claims across 2 drugs.
Dr. Decker's Part D claims by kind of drug, 2024
- Generic60 claims76%
- Brand-name19 claims24%
Dr. Decker'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. Decker's Part D claims, 2024
- Opioids15%12 of 79 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: 612024: 5215%
Drugs named by CMS: 2 in 2024, 2 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
How Dr. Ruth A. Decker takes part in Medicare
Dr. Decker accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Ruth A. Decker received $731 in industry payments from 2018 to 2025
CMS Open Payments shows 20 general payments to Dr. Decker from 4 drug and device companies from 2018 to 2025. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $674.
General payments to Dr. Decker by program year, 2018 to 2025
Companies that paid Dr. Decker the most, 2018 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Ruth A. Decker graduated from University of Wisconsin School of Medicine
Dr. Decker graduated from University of Wisconsin School of Medicine in 1986.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Ruth A. Decker'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) |
| 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. Ruth A. Decker
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. Ruth A. Decker's NPI number?
Dr. Ruth A. Decker's NPI number is 1538145552. It was assigned on December 21, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Ruth A. Decker?
Dr. Ruth A. Decker is a general surgeon in Chesterfield, Missouri. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Ruth A. Decker practice?
Dr. Decker practices at 232 S Woods Mill Rd, Chesterfield, MO 63017. Dr. Decker's primary practice is St. Luke's Hospital in Chesterfield, Missouri, part of St. Luke's Episcopal-Presbyterian Hospital. Dmand AI also links Dr. Decker to 1 breast imaging center and 1 physician office.
What is Dr. Ruth A. Decker's office phone number?
The practice phone on file for Dr. Decker is (314) 434-1500.
What is Dr. Ruth A. Decker's medical license number?
Dr. Decker holds Missouri license R6H10.
Which hospitals is Dr. Ruth A. Decker affiliated with?
Dr. Decker practices at St. Luke's Hospital in Chesterfield, Missouri. Dr. Decker is also affiliated with Barnes-Jewish West County Hospital.
Does Dr. Ruth A. Decker accept Medicare?
Yes. CMS data shows Dr. Decker billed Medicare for 62 services in 2024, and Dr. Decker accepts Medicare assignment.
How many Medicare patients does Dr. Ruth A. Decker see?
CMS counts 53 Medicare patients who saw Dr. Decker in 2024, with an average age of 76.
What services does Dr. Ruth A. Decker bill to Medicare?
In 2024, Dr. Decker's most billed Medicare services were office visit, new patient (99203), office visit, new patient (99204) and surgery: endocrine glands (60500).
Where did Dr. Ruth A. Decker go to medical school?
Dr. Decker graduated from University of Wisconsin School of Medicine in 1986.
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What drugs does Dr. Ruth A. Decker prescribe most?
In 2024 Medicare Part D data, Dr. Decker's most prescribed drugs by claims were Levothyroxine Sodium and Hydrocodone-Acetaminophen.
Has Dr. Ruth A. Decker received payments from drug or device companies?
CMS Open Payments shows $731 in general payments to Dr. Decker from 4 companies from 2018 to 2025. The largest total came from Abbvie Inc.
How long has Dr. Ruth A. Decker been practicing?
Dr. Decker graduated from medical school in 1986, 40 years ago.
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