Dr. Rebecca Lipton Warkol, MD
- Medicare services, 2024
- 1,123
- Medicare patients, 2024
- 171
- Part D claims, 2024
- 1,932
- Hospital affiliations
- 2
- Industry payments
- $622
- 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. Warkol'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. Rebecca Lipton Warkol is an internist in Greenwich, Connecticut
Dr. Warkol practices at Greenwich Hospital in Greenwich, Connecticut, part of Yale New Haven Health System.
Dr. Warkol's NPI, 1184820110, was assigned on June 26, 2007. Dr. Warkol graduated from New York Medical College in 2003. Dr. Warkol holds Connecticut license 045522.
- NPI
- 1184820110NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2567555022
- NPI enumeration date
- June 26, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (203) 863-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Rebecca Lipton Warkol practices at Greenwich Hospital in Greenwich, Connecticut
Dr. Warkol'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. Rebecca Lipton Warkol is affiliated with 6 sites of care and 3 medical groups
Dr. Warkol's primary practice is Greenwich Hospital in Greenwich, Connecticut, part of Yale New Haven Health System. Dr. Warkol is also affiliated with Stamford Hospital. The medical group on file is Old Greenwich Medical Group. Dmand AI also links Dr. Warkol to 3 more group practices and clinics, 2 medical groups 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. Rebecca Lipton Warkol's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Warkol practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Greenwich Hospital | Available with a free account |
| +5 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Rebecca Lipton Warkol is one of 2,189 internists in Connecticut
Internal medicine is Dr. Warkol's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Warkol's licenses on file in 2 states: Connecticut and New York.
Specialties and state licenses
- Internal medicine, ConnecticutPrimary
- New York license
Internists near Dr. Warkol
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. Rebecca Lipton Warkol billed Medicare for 1,123 services in 2024
CMS data shows 1,123 Medicare services from Dr. Warkol across 9 procedure codes in 2024, for 171 Medicare patients. Medicare paid $54,471 for them. Every service was in an office.
Dr. Warkol's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4002024: 48922%
- Other services
- 2023: 722024: 323349%
- Tests and treatments
- 2023: 3192024: 3113%
Dr. Warkol compared with the Connecticut median for internists, 2024
- Dr. Warkol
- Connecticut median
- Medicare services
- 1,123vs 3902.9 times
- Medicare patients
- 171vs 172Close to median
- Part D claims
- 1,614vs 3434.7 times
Medians across 2,185 internists in Connecticut with Dmand AI profiles that report each measure.
Dr. Warkol'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. Warkol and other internists in Connecticut.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Rebecca Lipton Warkol treated 171 Medicare patients in 2024, average age 74
CMS counts 171 Medicare patients who saw Dr. Warkol in 2024. The largest group is 65 to 74, with 107 patients. 75% of them have high cholesterol, and 52% have high blood pressure. Their average risk score is 0.76, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Warkol's median patient age at 54, with 80% women.
Dr. Warkol's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Warkol's Medicare patients by sex, 2024
- Women13680%
- Men3520%
Chronic conditions among Dr. Warkol's Medicare patients, 2024
- High cholesterol75%
- High blood pressure52%
- Osteoporosis36%
- Arthritis35%
- Anxiety24%
- Depression22%
- Mood disorders22%
- Chronic kidney disease18%
Share of Medicare patients with each condition. A patient can have several.
Dr. Warkol's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 54
Patient panel by sex, all payers
- Women80%
- Men15%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Rebecca Lipton Warkol wrote 1,932 Medicare Part D claims in 2024
In 2024, Dr. Warkol wrote 1,932 Medicare Part D claims for 201 patients. 89% of them were for generic drugs. CMS names the drug for 1,614 of them, across 38 drugs with 11 or more claims each, at $113,707 in total drug cost. In 2023, CMS named 1,381 claims across 35 drugs.
Dr. Warkol's Part D claims by kind of drug, 2024
- Generic1,729 claims89%
- Brand-name and other203 claims11%
Dr. Warkol'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. Warkol's Part D claims, 2024
- Opioids1%15 of 1,932 claims
- Antibiotics2%44 of 1,932 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: 1,3812024: 1,61417%
Drugs named by CMS: 38 in 2024, 35 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. Rebecca Lipton Warkol offers telehealth to Medicare patients
Dr. Warkol accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Warkol as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Rebecca Lipton Warkol received $622 in industry payments from 2021 to 2025
CMS Open Payments shows 19 general payments to Dr. Warkol from 7 drug and device companies from 2021 to 2025. Food and beverage make up the largest share, 100% of the total. Novo Nordisk Inc paid the most, $179.
General payments to Dr. Warkol by program year, 2021 to 2025
Companies that paid Dr. Warkol the most, 2021 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Rebecca Lipton Warkol graduated from New York Medical College
Dr. Warkol graduated from New York Medical College in 2003.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Rebecca Lipton Warkol'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. Rebecca Lipton Warkol
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. Rebecca Lipton Warkol's NPI number?
Dr. Rebecca Lipton Warkol's NPI number is 1184820110. It was assigned on June 26, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Rebecca Lipton Warkol?
Dr. Rebecca Lipton Warkol is an internist in Greenwich, Connecticut. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Rebecca Lipton Warkol practice?
Dr. Warkol practices at 5 Perryridge Rd, Greenwich, CT 06830. Dr. Warkol's primary practice is Greenwich Hospital in Greenwich, Connecticut, part of Yale New Haven Health System. Dmand AI also links Dr. Warkol to 3 group practices and clinics, 2 medical groups and 1 home health agency.
What is Dr. Rebecca Lipton Warkol's office phone number?
The practice phone on file for Dr. Warkol is (203) 863-3000.
What is Dr. Rebecca Lipton Warkol's medical license number?
Dr. Warkol holds Connecticut license 045522, one of the licenses on file in 2 states.
Which states has Dr. Rebecca Lipton Warkol been licensed in?
Dmand AI has state licenses on file for Dr. Warkol in Connecticut and New York.
Which hospitals is Dr. Rebecca Lipton Warkol affiliated with?
Dr. Warkol practices at Greenwich Hospital in Greenwich, Connecticut. Dr. Warkol is also affiliated with Stamford Hospital.
What medical group is Dr. Rebecca Lipton Warkol part of?
Dr. Warkol is linked to Old Greenwich Medical Group. Dmand AI links Dr. Warkol to 2 more medical groups.
Does Dr. Rebecca Lipton Warkol accept Medicare?
Yes. CMS data shows Dr. Warkol billed Medicare for 1,123 services in 2024, and Dr. Warkol accepts Medicare assignment.
Does Dr. Rebecca Lipton Warkol offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Warkol as offering telehealth services.
Show 6 more questionsShow fewer questions
How many Medicare patients does Dr. Rebecca Lipton Warkol see?
CMS counts 171 Medicare patients who saw Dr. Warkol in 2024, with an average age of 74.
What services does Dr. Rebecca Lipton Warkol bill to Medicare?
In 2024, Dr. Warkol's most billed Medicare services were medicare service (G2211), office visit, established patient (99213) and office visit, established patient (99215).
Where did Dr. Rebecca Lipton Warkol go to medical school?
Dr. Warkol graduated from New York Medical College in 2003.
What drugs does Dr. Rebecca Lipton Warkol prescribe most?
In 2024 Medicare Part D data, Dr. Warkol's most prescribed drugs by claims were Rosuvastatin Calcium, Atorvastatin Calcium and Levothyroxine Sodium.
Has Dr. Rebecca Lipton Warkol received payments from drug or device companies?
CMS Open Payments shows $622 in general payments to Dr. Warkol from 7 companies from 2021 to 2025. The largest total came from Novo Nordisk Inc.
How long has Dr. Rebecca Lipton Warkol been practicing?
Dr. Warkol graduated from medical school in 2003, 23 years ago.
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