AnesthesiaCoronavirus InfectionsCOVID-19
Dr. Geraldine A. Ryan, MD
NPI1689640609PAC ID7810094828
- Medicare services, 2024
- 538
- Medicare patients, 2024
- 191
- Part D claims, 2024
- 6,874
- Publications
- 1
- Hospital affiliations
- 5
- Practice address
- 615 New Ballas Road, Saint Louis, MO 63141
- Practice phone
- Call (314) 251-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Ryan'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. Geraldine A. Ryan is an internist in Saint Louis, Missouri
Dr. Ryan practices at Mercy Hospital St. Louis in Saint Louis, Missouri, part of Mercy.
Dr. Ryan's NPI, 1689640609, was assigned on February 28, 2006. Dr. Ryan graduated from Saint Louis University School of Medicine in 1988. Dr. Ryan holds Missouri license 100756.
NPI and contact details
- NPI
- 1689640609NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7810094828
- NPI enumeration date
- February 28, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (314) 251-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 64
- Medical school graduation
- 1988
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Geraldine A. Ryan practices at Mercy Hospital St. Louis in Saint Louis, Missouri
Dr. Ryan's primary practice is Mercy Hospital St. Louis, at 615 New Ballas Road, Saint Louis, MO 63141 in St. Louis County. The practice phone is (314) 251-6000.
- Mercy Hospital St. Louis615 New Ballas Road, Saint Louis, MO 63141 · St. Louis CountyPhone(314) 251-6000
Source: Dmand AI Affiliation Data
Dr. Geraldine A. Ryan is affiliated with 7 sites of care and 1 medical group
Dr. Ryan's primary practice is Mercy Hospital St. Louis in Saint Louis, Missouri, part of Mercy. Dr. Ryan is also affiliated with St. Luke's Hospital. The medical group on file is Mercy Clinic East Communities. Dmand AI also links Dr. Ryan to 3 more hospitals, 1 group practice or clinic and 1 home health agency, each named with a free account.
St. Luke's HospitalMercy Clinic East Communities3 hospitalsNames with a free account1 group practice or clinicName with a free account1 home health agencyName with a free account
See all 8 affiliations for Dr. RyanSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Geraldine A. Ryan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ryan practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mercy Hospital St. Louis | Available with a free account |
| +6 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every hospital where Dr. Ryan practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across Mercy and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Geraldine A. Ryan is one of 2,114 internists in Missouri
Internal medicine is Dr. Ryan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Ryan is licensed in Missouri.
Specialties and state licenses
- Internal medicine, MissouriPrimary
Internists near Dr. Ryan
Counts of internists 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. Geraldine A. Ryan billed Medicare for 538 services in 2024
CMS data shows 538 Medicare services from Dr. Ryan across 7 procedure codes in 2024, for 191 Medicare patients. Medicare paid $47,097 for them. Every service was in an office.
Medicare services, 2024538
Medicare patients191
Paid by Medicare$47,097
Procedure codes7
Dr. Ryan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3122024: 2868%
- Other services
- 2023: 1822024: 1978%
- Tests and treatments
- 2023: 522024: 556%
Dr. Ryan compared with the Missouri median for internists, 2024
- Dr. Ryan
- Missouri median
- Medicare services
- 538vs 530Close to median
- Medicare patients
- 191vs 2119% below
- Part D claims
- 6,112vs 32518.8 times
Medians across 2,076 internists in Missouri with Dmand AI profiles that report each measure.
Dr. Ryan'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.
Need commercial claims for Dr. Ryan?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Ryan and other internists in Missouri.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Geraldine A. Ryan treated 191 Medicare patients in 2024, average age 72
CMS counts 191 Medicare patients who saw Dr. Ryan in 2024. The largest group is 65 to 74, with 113 patients. 71% of them have high blood pressure, and 64% have high cholesterol. Their average risk score is 0.96, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Ryan's median patient age at 65, with 67% women.
Medicare patients, 2024191
Average age72
Average risk score0.96
Dr. Ryan's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Ryan's Medicare patients by sex, 2024
- Women13169%
- Men6031%
Chronic conditions among Dr. Ryan's Medicare patients, 2024
- High blood pressure71%
- High cholesterol64%
- Arthritis42%
- Chronic kidney disease27%
- Diabetes21%
- Anxiety19%
- Ischemic heart disease18%
- Mood disorders18%
Share of Medicare patients with each condition. A patient can have several.
Dr. Ryan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women67%
- Men32%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Geraldine A. Ryan wrote 6,874 Medicare Part D claims in 2024
In 2024, Dr. Ryan wrote 6,874 Medicare Part D claims for 544 patients. 86% of them were for generic drugs. CMS names the drug for 6,112 of them, across 103 drugs with 11 or more claims each, at $450,974 in total drug cost. In 2023, CMS named 5,290 claims across 105 drugs.
Part D claims, 20246,874
Drugs named by CMS103
Total drug cost$450,974
Part D patients544
Dr. Ryan's Part D claims by kind of drug, 2024
- Generic5,932 claims86%
- Brand-name899 claims13%
- Other43 claims1%
Dr. Ryan'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. Ryan's Part D claims, 2024
- Opioids1%100 of 6,874 claims
- Antibiotics2%167 of 6,874 claims
- Antipsychotics, patients 65 and over0%18 of 6,874 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: 5,2902024: 6,11216%
Drugs named by CMS: 103 in 2024, 105 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. Geraldine A. Ryan offers telehealth to Medicare patients
Dr. Ryan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Ryan as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
Find internists like Dr. Ryan by procedure volume and prescribing
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Geraldine A. Ryan has 1 publication on record
Dmand AI links 1 paper to Dr. Ryan.
Papers1
Recent publications by Dr. Ryan
See who Dr. Ryan researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Ryan works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Geraldine A. Ryan received $3,501 in industry payments from 2016 to 2025
CMS Open Payments shows 194 general payments to Dr. Ryan from 43 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $468.
General payments to Dr. Ryan by program year, 2016 to 2025
Companies that paid Dr. Ryan the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Geraldine A. Ryan graduated from Saint Louis University School of Medicine
Dr. Ryan graduated from Saint Louis University School of Medicine in 1988.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Geraldine A. Ryan'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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Geraldine A. Ryan
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. Geraldine A. Ryan's NPI number?
Dr. Geraldine A. Ryan's NPI number is 1689640609. It was assigned on February 28, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Geraldine A. Ryan?
Dr. Geraldine A. Ryan is an internist in Saint Louis, Missouri. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Geraldine A. Ryan practice?
Dr. Ryan practices at 615 New Ballas Road, Saint Louis, MO 63141. Dr. Ryan's primary practice is Mercy Hospital St. Louis in Saint Louis, Missouri, part of Mercy. Dmand AI also links Dr. Ryan to 3 hospitals, 1 group practice or clinic and 1 home health agency.
What is Dr. Geraldine A. Ryan's office phone number?
The practice phone on file for Dr. Ryan is (314) 251-6000.
What is Dr. Geraldine A. Ryan's medical license number?
Dr. Ryan holds Missouri license 100756.
Which hospitals is Dr. Geraldine A. Ryan affiliated with?
Dr. Ryan practices at Mercy Hospital St. Louis in Saint Louis, Missouri. Dr. Ryan is also affiliated with St. Luke's Hospital. Dmand AI links Dr. Ryan to 3 more hospitals.
What medical group is Dr. Geraldine A. Ryan part of?
Dr. Ryan is linked to Mercy Clinic East Communities.
Does Dr. Geraldine A. Ryan accept Medicare?
Yes. CMS data shows Dr. Ryan billed Medicare for 538 services in 2024, and Dr. Ryan accepts Medicare assignment.
Does Dr. Geraldine A. Ryan offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Ryan as offering telehealth services.
How many Medicare patients does Dr. Geraldine A. Ryan see?
CMS counts 191 Medicare patients who saw Dr. Ryan in 2024, with an average age of 72.
Show 6 more questionsShow fewer questions
What services does Dr. Geraldine A. Ryan bill to Medicare?
In 2024, Dr. Ryan's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and medicare service (G0439).
Where did Dr. Geraldine A. Ryan go to medical school?
Dr. Ryan graduated from Saint Louis University School of Medicine in 1988.
What drugs does Dr. Geraldine A. Ryan prescribe most?
In 2024 Medicare Part D data, Dr. Ryan's most prescribed drugs by claims were Atorvastatin Calcium, Levothyroxine Sodium and Losartan Potassium.
Has Dr. Geraldine A. Ryan received payments from drug or device companies?
CMS Open Payments shows $3,501 in general payments to Dr. Ryan from 43 companies from 2016 to 2025. The largest total came from Abbvie Inc.
How long has Dr. Geraldine A. Ryan been practicing?
Dr. Ryan graduated from medical school in 1988, 38 years ago.
Does Dr. Geraldine A. Ryan do research?
Dmand AI links 1 publication to Dr. Ryan.
Selling to internal medicine practices?
See internists in Missouri by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card