Dr. Mary E. Keller, MD
- Medicare services, 2024
- 934
- Medicare patients, 2024
- 237
- Part D claims, 2024
- 96
- Hospital affiliations
- 4
- Industry payments
- $23
- Practice address
- 5666 East State Street, Rockford, IL 61108
- Practice phone
- Call (815) 226-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Keller's professional email, personal email and mobile number
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Dr. Mary E. Keller is a general surgeon in Rockford, Illinois
Dr. Keller practices at OSF Saint Anthony Medical Center in Rockford, Illinois, part of OSF HealthCare System.
Dr. Keller's NPI, 1275567703, was assigned on July 10, 2006. Dr. Keller graduated from University of Missouri, Kansas City, School of Medicine in 1994. Dr. Keller holds Illinois license 036107717.
- NPI
- 1275567703NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5799704938
- NPI enumeration date
- July 10, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (815) 226-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 58
- Medical school graduation
- 1994
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mary E. Keller practices at OSF Saint Anthony Medical Center in Rockford, Illinois
Dr. Keller's primary practice is OSF Saint Anthony Medical Center, at 5666 East State Street, Rockford, IL 61108 in Winnebago County. The practice phone is (815) 226-2000.
- OSF Saint Anthony Medical Center5666 East State Street, Rockford, IL 61108 · Winnebago CountyPhone(815) 226-2000
Source: Dmand AI Affiliation Data
Dr. Mary E. Keller is affiliated with 6 sites of care and 1 medical group
Dr. Keller's primary practice is OSF Saint Anthony Medical Center in Rockford, Illinois, part of OSF HealthCare System. Dr. Keller is also affiliated with UW Health SwedishAmerican Hospital. The medical group on file is OSF Multi-Specialty Group. Dmand AI also links Dr. Keller to 2 more hospitals, 1 group practice or clinic and 1 home health agency, 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. Mary E. Keller's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Keller practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| OSF Saint Anthony Medical Center | Available with a free account |
| +5 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mary E. Keller is one of 1,217 general surgeons in Illinois
Surgery is Dr. Keller's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Keller is licensed in Illinois.
Specialties and state licenses
- Surgery, IllinoisPrimary
General surgeons near Dr. Keller
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. Mary E. Keller billed Medicare for 934 services in 2024
CMS data shows 934 Medicare services from Dr. Keller across 10 procedure codes in 2024, for 237 Medicare patients. Medicare paid $45,255 for them.
Dr. Keller's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 8552024: 8105%
- Tests and treatments
- 2023: 1,0182024: 8692%
- Surgery
- 2023: 952024: 3860%
Where Dr. Keller's Medicare services took place, 2024
- In an office212%
- In a facility91398%
Dr. Keller compared with the Illinois median for general surgeons, 2024
- Dr. Keller
- Illinois median
- Medicare services
- 934vs 1944.8 times
- Medicare patients
- 237vs 14465% above
- Part D claims
- 64vs 282.3 times
Medians across 1,031 general surgeons in Illinois with Dmand AI profiles that report each measure.
Dr. Keller'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. Mary E. Keller treated 237 Medicare patients in 2024, average age 76
CMS counts 237 Medicare patients who saw Dr. Keller in 2024. The largest group is 75 to 84, with 88 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 23% are also on Medicaid. Their average risk score is 2.33, 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. Keller's median patient age at 75, with 56% women.
Dr. Keller's Medicare patients by age, 2024
Dr. Keller's Medicare patients by sex, 2024
- Women12954%
- Men10846%
Chronic conditions among Dr. Keller's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis65%
- Diabetes52%
- Heart failure49%
- Chronic kidney disease46%
- Ischemic heart disease46%
- Atrial fibrillation38%
Share of Medicare patients with each condition. A patient can have several.
Dr. Keller's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women56%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mary E. Keller wrote 96 Medicare Part D claims in 2024
In 2024, Dr. Keller wrote 96 Medicare Part D claims for 39 patients. 92% of them were for generic drugs. CMS names the drug for 64 of them, across 2 drugs with 11 or more claims each, at $1,211 in total drug cost. In 2023, CMS named 87 claims across 3 drugs.
Dr. Keller's Part D claims by kind of drug, 2024
- Generic88 claims92%
- Brand-name and other8 claims8%
Dr. Keller'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. Keller's Part D claims, 2024
- Antibiotics21%20 of 96 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: 872024: 6426%
Drugs named by CMS: 2 in 2024, 3 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. Mary E. Keller ranks in the 86th percentile for removal of tissue in Medicare
Dr. Keller accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 105 procedures of removal of tissue by Dr. Keller, more than 86% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Keller ranks in Medicare procedure volume
- Removal of tissue
- 86th percentile105 procedures
- Removal of skin lesions
- 68th percentile29 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Skin biopsy: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Mary E. Keller received $23 in industry payments in 2025
CMS Open Payments shows 1 general payment to Dr. Keller from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. MIMEDX Group, Inc. paid the most, $23.
Companies that paid Dr. Keller the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mary E. Keller graduated from University of Missouri, Kansas City, School of Medicine
Dr. Keller graduated from University of Missouri, Kansas City, School of Medicine in 1994.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mary E. Keller'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)Doctors and Clinicians Utilization Data (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. Mary E. Keller
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. Mary E. Keller's NPI number?
Dr. Mary E. Keller's NPI number is 1275567703. It was assigned on July 10, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mary E. Keller?
Dr. Mary E. Keller is a general surgeon in Rockford, Illinois. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Mary E. Keller practice?
Dr. Keller practices at 5666 East State Street, Rockford, IL 61108. Dr. Keller's primary practice is OSF Saint Anthony Medical Center in Rockford, Illinois, part of OSF HealthCare System. Dmand AI also links Dr. Keller to 2 hospitals, 1 group practice or clinic and 1 home health agency.
What is Dr. Mary E. Keller's office phone number?
The practice phone on file for Dr. Keller is (815) 226-2000.
What is Dr. Mary E. Keller's medical license number?
Dr. Keller holds Illinois license 036107717.
Which hospitals is Dr. Mary E. Keller affiliated with?
Dr. Keller practices at OSF Saint Anthony Medical Center in Rockford, Illinois. Dr. Keller is also affiliated with UW Health SwedishAmerican Hospital. Dmand AI links Dr. Keller to 2 more hospitals.
What medical group is Dr. Mary E. Keller part of?
Dr. Keller is linked to OSF Multi-Specialty Group.
Does Dr. Mary E. Keller accept Medicare?
Yes. CMS data shows Dr. Keller billed Medicare for 934 services in 2024, and Dr. Keller accepts Medicare assignment.
How many Medicare patients does Dr. Mary E. Keller see?
CMS counts 237 Medicare patients who saw Dr. Keller in 2024, with an average age of 76.
What services does Dr. Mary E. Keller bill to Medicare?
In 2024, Dr. Keller's most billed Medicare services were office visit, established patient (99213), physical therapy and rehabilitation (97597) and office visit, established patient (99214).
Show 4 more questionsShow fewer questions
Where did Dr. Mary E. Keller go to medical school?
Dr. Keller graduated from University of Missouri, Kansas City, School of Medicine in 1994.
What drugs does Dr. Mary E. Keller prescribe most?
In 2024 Medicare Part D data, Dr. Keller's most prescribed drugs by claims were Mupirocin and Gentamicin Sulfate.
Has Dr. Mary E. Keller received payments from drug or device companies?
CMS Open Payments shows $23 in general payments to Dr. Keller from 1 company from 2025 to 2025. The largest total came from MIMEDX Group, Inc.
How long has Dr. Mary E. Keller been practicing?
Dr. Keller graduated from medical school in 1994, 32 years ago.
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