Dr. Karen Ann Rummel, DO
- Medicare services, 2024
- 437
- Medicare patients, 2024
- 416
- Part D claims, 2024
- 116
- MIPS score, 2024
- 91
- Hospital affiliations
- 1
- Practice address
- 5 Perryridge Rd, Greenwich, CT 06830
- Practice phone
- Call (203) 863-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Rummel's professional email, personal email and mobile number
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Dr. Karen Ann Rummel is an emergency medicine physician in Greenwich, Connecticut
Dr. Rummel practices at Greenwich Hospital in Greenwich, Connecticut, part of Yale New Haven Health System.
Dr. Rummel's NPI, 1477598001, was assigned on June 18, 2006. Dr. Rummel graduated from NYIT College Of Osteopathic Medicine in 2002. Dr. Rummel holds New York license 236723.
- NPI
- 1477598001NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7618983875
- NPI enumeration date
- June 18, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (203) 863-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 52
- Medical school graduation
- 2002
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Karen Ann Rummel practices at Greenwich Hospital in Greenwich, Connecticut
Dr. Rummel's primary practice is Greenwich Hospital, at 5 Perryridge Rd, Greenwich, CT 06830 in Fairfield County. The practice phone is (203) 863-3000.
- Greenwich Hospital5 Perryridge Rd, Greenwich, CT 06830 · Fairfield CountyPhone(203) 863-3000
Source: Dmand AI Affiliation Data
Dr. Karen Ann Rummel is affiliated with 1 site of care and 1 medical group
Dr. Rummel's primary practice is Greenwich Hospital in Greenwich, Connecticut, part of Yale New Haven Health System. The medical group on file is Greenwich Hospital. Dr. Rummel's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Karen Ann Rummel's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Rummel practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Greenwich Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Karen Ann Rummel is one of 683 emergency medicine physicians in Connecticut
Emergency medicine is Dr. Rummel's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Rummel is licensed in New York.
Specialties and state licenses
- Emergency medicine, New YorkPrimary
Emergency medicine physicians near Dr. Rummel
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. Karen Ann Rummel billed Medicare for 437 services in 2024
CMS data shows 437 Medicare services from Dr. Rummel across 4 procedure codes in 2024, for 416 Medicare patients. Medicare paid $51,542 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Rummel's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4322024: 4371%
Dr. Rummel compared with the Connecticut median for emergency medicine physicians, 2024
- Dr. Rummel
- Connecticut median
- Medicare services
- 437vs 24380% above
- Medicare patients
- 416vs 25066% above
- Part D claims
- 12vs 4875% below
Medians across 695 emergency medicine physicians in Connecticut with Dmand AI profiles that report each measure.
Dr. Rummel'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Rummel and other emergency medicine physicians in Connecticut.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Karen Ann Rummel treated 416 Medicare patients in 2024, average age 81
CMS counts 416 Medicare patients who saw Dr. Rummel in 2024. The largest group is 85 and over, with 159 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 16% are also on Medicaid. Their average risk score is 1.79, 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. Rummel's median patient age at 73, with 54% women.
Dr. Rummel's Medicare patients by age, 2024
Dr. Rummel's Medicare patients by sex, 2024
- Women24258%
- Men17442%
Chronic conditions among Dr. Rummel's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis58%
- Mood disorders41%
- Ischemic heart disease38%
- Anxiety37%
- Depression35%
- Chronic kidney disease33%
Share of Medicare patients with each condition. A patient can have several.
Dr. Rummel's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women54%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Karen Ann Rummel wrote 116 Medicare Part D claims in 2024
In 2024, Dr. Rummel wrote 116 Medicare Part D claims for 90 patients. 97% of them were for generic drugs. CMS names the drug for 12 of them, across 1 drug with 11 or more claims each, at $238 in total drug cost. In 2023, CMS named 23 claims across 2 drugs.
Dr. Rummel's Part D claims by kind of drug, 2024
- Generic112 claims97%
- Brand-name and other4 claims3%
Dr. Rummel'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. Rummel's Part D claims, 2024
- Opioids12%14 of 116 claims
- Antibiotics39%45 of 116 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: 232024: 1248%
Drugs named by CMS: 1 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
Dr. Karen Ann Rummel scored 91 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 91 out of 100 for Dr. Rummel for performance year 2024, reported as part of a group. Dr. Rummel accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Rummel's MIPS scores, performance year 2024
- 91of 100Final score
- 86.8of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 77of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Karen Ann Rummel received $16 in industry payments in 2017
CMS Open Payments shows 1 general payment to Dr. Rummel from 1 drug or device company in 2017. Food and beverage make up the largest share, 100% of the total. Bristol-Myers Squibb Company paid the most, $16.
Companies that paid Dr. Rummel the most, 2017 to 2017
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Karen Ann Rummel graduated from NYIT College Of Osteopathic Medicine
Dr. Rummel graduated from NYIT College Of Osteopathic Medicine in 2002.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Karen Ann Rummel'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)Clinician Public Reporting: Overall MIPS Performance (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. Karen Ann Rummel
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. Karen Ann Rummel's NPI number?
Dr. Karen Ann Rummel's NPI number is 1477598001. It was assigned on June 18, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Karen Ann Rummel?
Dr. Karen Ann Rummel is an emergency medicine physician in Greenwich, Connecticut. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Karen Ann Rummel practice?
Dr. Rummel practices at 5 Perryridge Rd, Greenwich, CT 06830. Dr. Rummel's primary practice is Greenwich Hospital in Greenwich, Connecticut, part of Yale New Haven Health System.
What is Dr. Karen Ann Rummel's office phone number?
The practice phone on file for Dr. Rummel is (203) 863-3000.
What is Dr. Karen Ann Rummel's medical license number?
Dr. Rummel holds New York license 236723.
Which hospitals is Dr. Karen Ann Rummel affiliated with?
Dr. Rummel practices at Greenwich Hospital in Greenwich, Connecticut.
What medical group is Dr. Karen Ann Rummel part of?
Dr. Rummel is linked to Greenwich Hospital.
Does Dr. Karen Ann Rummel accept Medicare?
Yes. CMS data shows Dr. Rummel billed Medicare for 437 services in 2024, and Dr. Rummel accepts Medicare assignment.
What is Dr. Karen Ann Rummel's MIPS score?
Dr. Rummel's MIPS final score for performance year 2024 is 91 out of 100, reported as part of a group.
How many Medicare patients does Dr. Karen Ann Rummel see?
CMS counts 416 Medicare patients who saw Dr. Rummel in 2024, with an average age of 81.
Show 5 more questionsShow fewer questions
What services does Dr. Karen Ann Rummel bill to Medicare?
In 2024, Dr. Rummel's most billed Medicare services were emergency department visit (99285), emergency department visit (99284) and emergency department visit (99283).
Where did Dr. Karen Ann Rummel go to medical school?
Dr. Rummel graduated from NYIT College Of Osteopathic Medicine in 2002.
What drugs does Dr. Karen Ann Rummel prescribe most?
In 2024 Medicare Part D data, Dr. Rummel's most prescribed drugs by claims were Cefuroxime.
Has Dr. Karen Ann Rummel received payments from drug or device companies?
CMS Open Payments shows $16 in general payments to Dr. Rummel from 1 company from 2017 to 2017. The largest total came from Bristol-Myers Squibb Company.
How long has Dr. Karen Ann Rummel been practicing?
Dr. Rummel graduated from medical school in 2002, 24 years ago.
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