Dr. Ana Lopez-O'Sullivan, MD
- Medicare services, 2024
- 423
- Medicare patients, 2024
- 342
- Part D claims, 2024
- 327
- Hospital affiliations
- 1
- Industry payments
- $53
- Practice address
- 4420 Lake Boone Trail, Raleigh, NC 27607
- Practice phone
- Call (919) 784-3100
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Lopez-O'Sullivan'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. Ana Lopez-O'Sullivan is an emergency medicine physician in Raleigh, North Carolina
Dr. Lopez-O'Sullivan practices at UNC Health Rex in Raleigh, North Carolina, part of University of North Carolina Health Care System.
Dr. Lopez-O'Sullivan's NPI, 1235363193, was assigned on May 7, 2009. Dr. Lopez-O'Sullivan graduated from David Geffen School of Medicine at UCLA in 2009. Dr. Lopez-O'Sullivan holds California license A114378.
- NPI
- 1235363193NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8022244540
- NPI enumeration date
- May 7, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (919) 784-3100
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 43
- Medical school graduation
- 2009
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ana Lopez-O'Sullivan practices at UNC Health Rex in Raleigh, North Carolina
Dr. Lopez-O'Sullivan's primary practice is UNC Health Rex, at 4420 Lake Boone Trail, Raleigh, NC 27607 in Wake County. The practice phone is (919) 784-3100.
- UNC Health Rex4420 Lake Boone Trail, Raleigh, NC 27607 · Wake CountyPhone(919) 784-3100
Source: Dmand AI Affiliation Data
Dr. Ana Lopez-O'Sullivan is affiliated with 3 sites of care and 4 medical groups
Dr. Lopez-O'Sullivan's primary practice is UNC Health Rex in Raleigh, North Carolina, part of University of North Carolina Health Care System. The medical group on file is Raleigh Emergency Medicine Associates. Dmand AI also links Dr. Lopez-O'Sullivan to 3 more medical groups, 1 clinical lab and 1 group practice or clinic, 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. Ana Lopez-O'Sullivan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lopez-O'Sullivan practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UNC Health Rex | Available with a free account |
| +2 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ana Lopez-O'Sullivan is one of 1,860 emergency medicine physicians in North Carolina
Emergency medicine is Dr. Lopez-O'Sullivan's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Lopez-O'Sullivan is board certified in emergency medicine by the American Board of Emergency Medicine. Dmand AI has Dr. Lopez-O'Sullivan's licenses on file in 2 states: California and North Carolina.
Specialties and state licenses
- Emergency medicine, CaliforniaPrimary
- North Carolina license
Emergency medicine physicians near Dr. Lopez-O'Sullivan
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. Ana Lopez-O'Sullivan billed Medicare for 423 services in 2024
CMS data shows 423 Medicare services from Dr. Lopez-O'Sullivan across 5 procedure codes in 2024, for 342 Medicare patients. Medicare paid $44,426 for them.
Dr. Lopez-O'Sullivan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3782024: 3439%
- Tests and treatments
- 2023: 782024: 803%
Where Dr. Lopez-O'Sullivan's Medicare services took place, 2024
- In an office113%
- In a facility41297%
Dr. Lopez-O'Sullivan compared with the North Carolina median for emergency medicine physicians, 2024
- Dr. Lopez-O'Sullivan
- North Carolina median
- Medicare services
- 423vs 28449% above
- Medicare patients
- 342vs 25136% above
- Part D claims
- 196vs 802.5 times
Medians across 1,795 emergency medicine physicians in North Carolina with Dmand AI profiles that report each measure.
Dr. Lopez-O'Sullivan'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. Ana Lopez-O'Sullivan treated 342 Medicare patients in 2024, average age 77
CMS counts 342 Medicare patients who saw Dr. Lopez-O'Sullivan in 2024. The largest group is 75 to 84, with 126 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 33% are also on Medicaid. Their average risk score is 2.05, 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. Lopez-O'Sullivan's median patient age at 46, with 57% women.
Dr. Lopez-O'Sullivan's Medicare patients by age, 2024
Dr. Lopez-O'Sullivan's Medicare patients by sex, 2024
- Women22064%
- Men12236%
Chronic conditions among Dr. Lopez-O'Sullivan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis49%
- Diabetes42%
- Chronic kidney disease39%
- Ischemic heart disease33%
- Heart failure32%
- Mood disorders31%
Share of Medicare patients with each condition. A patient can have several.
Dr. Lopez-O'Sullivan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 46
Patient panel by sex, all payers
- Women57%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ana Lopez-O'Sullivan wrote 327 Medicare Part D claims in 2024
In 2024, Dr. Lopez-O'Sullivan wrote 327 Medicare Part D claims for 206 patients. 92% of them were for generic drugs. CMS names the drug for 196 of them, across 9 drugs with 11 or more claims each, at $1,144 in total drug cost. In 2023, CMS named 187 claims across 9 drugs.
Dr. Lopez-O'Sullivan's Part D claims by kind of drug, 2024
- Generic301 claims92%
- Brand-name26 claims8%
Dr. Lopez-O'Sullivan'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. Lopez-O'Sullivan's Part D claims, 2024
- Opioids5%16 of 327 claims
- Antibiotics32%105 of 327 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: 1872024: 1965%
Drugs named by CMS: 9 in 2024, 9 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. Ana Lopez-O'Sullivan takes part in Medicare
Dr. Lopez-O'Sullivan 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. Ana Lopez-O'Sullivan received $53 in industry payments from 2019 to 2020
CMS Open Payments shows 3 general payments to Dr. Lopez-O'Sullivan from 3 drug and device companies from 2019 to 2020. Food and beverage make up the largest share, 100% of the total. Allergan Inc. paid the most, $19.
General payments to Dr. Lopez-O'Sullivan by program year, 2019 to 2020
Companies that paid Dr. Lopez-O'Sullivan the most, 2019 to 2020
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Ana Lopez-O'Sullivan graduated from David Geffen School of Medicine at UCLA
Dr. Lopez-O'Sullivan graduated from David Geffen School of Medicine at UCLA in 2009.
- Medical school
- Board certified in emergency medicine
Source: Dmand AI Professional Profile Data
Dr. Ana Lopez-O'Sullivan accepts plans from 6 insurance carriers
Dr. Lopez-O'Sullivan is in network with 6 carriers, including United Healthcare, Aspirus Health Plan and Blue Cross and Blue Shield of Kansas City. PPO plans come from the most carriers, 3. Check the plan with the practice before a visit.
- United Healthcare
- Aspirus Health Plan
- Blue Cross and Blue Shield of Kansas City
- CMS Medicare
- Elevance
- HCSC
Plan types Dr. Lopez-O'Sullivan accepts, by number of carriers
- PPO3
- Medicare2
- POS2
- EPO1
- HMO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Ana Lopez-O'Sullivan'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 |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Ana Lopez-O'Sullivan
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. Ana Lopez-O'Sullivan's NPI number?
Dr. Ana Lopez-O'Sullivan's NPI number is 1235363193. It was assigned on May 7, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Ana Lopez-O'Sullivan?
Dr. Ana Lopez-O'Sullivan is an emergency medicine physician in Raleigh, North Carolina. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Ana Lopez-O'Sullivan practice?
Dr. Lopez-O'Sullivan practices at 4420 Lake Boone Trail, Raleigh, NC 27607. Dr. Lopez-O'Sullivan's primary practice is UNC Health Rex in Raleigh, North Carolina, part of University of North Carolina Health Care System. Dmand AI also links Dr. Lopez-O'Sullivan to 3 medical groups, 1 clinical lab and 1 group practice or clinic.
What is Dr. Ana Lopez-O'Sullivan's office phone number?
The practice phone on file for Dr. Lopez-O'Sullivan is (919) 784-3100.
What is Dr. Ana Lopez-O'Sullivan's medical license number?
Dr. Lopez-O'Sullivan holds California license A114378, one of the licenses on file in 2 states.
Which states has Dr. Ana Lopez-O'Sullivan been licensed in?
Dmand AI has state licenses on file for Dr. Lopez-O'Sullivan in California (2010 to 2026) and North Carolina (2025).
Which hospitals is Dr. Ana Lopez-O'Sullivan affiliated with?
Dr. Lopez-O'Sullivan practices at UNC Health Rex in Raleigh, North Carolina.
What medical group is Dr. Ana Lopez-O'Sullivan part of?
Dr. Lopez-O'Sullivan is linked to Raleigh Emergency Medicine Associates. Dmand AI links Dr. Lopez-O'Sullivan to 3 more medical groups.
Does Dr. Ana Lopez-O'Sullivan accept Medicare?
Yes. CMS data shows Dr. Lopez-O'Sullivan billed Medicare for 423 services in 2024, and Dr. Lopez-O'Sullivan accepts Medicare assignment.
How many Medicare patients does Dr. Ana Lopez-O'Sullivan see?
CMS counts 342 Medicare patients who saw Dr. Lopez-O'Sullivan in 2024, with an average age of 77.
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Is Dr. Ana Lopez-O'Sullivan board certified?
Yes. Dr. Lopez-O'Sullivan is board certified in emergency medicine by the American Board of Emergency Medicine.
What services does Dr. Ana Lopez-O'Sullivan bill to Medicare?
In 2024, Dr. Lopez-O'Sullivan's most billed Medicare services were emergency department visit (99285), emergency department visit (99284) and heart test or procedure (93042).
Where did Dr. Ana Lopez-O'Sullivan go to medical school?
Dr. Lopez-O'Sullivan graduated from David Geffen School of Medicine at UCLA in 2009.
What drugs does Dr. Ana Lopez-O'Sullivan prescribe most?
In 2024 Medicare Part D data, Dr. Lopez-O'Sullivan's most prescribed drugs by claims were Ondansetron ODT, Cefdinir and Naproxen.
Has Dr. Ana Lopez-O'Sullivan received payments from drug or device companies?
CMS Open Payments shows $53 in general payments to Dr. Lopez-O'Sullivan from 3 companies from 2019 to 2020. The largest total came from Allergan Inc.
How long has Dr. Ana Lopez-O'Sullivan been practicing?
Dr. Lopez-O'Sullivan graduated from medical school in 2009, 17 years ago.
What insurance does Dr. Ana Lopez-O'Sullivan accept?
Dr. Lopez-O'Sullivan is in network with 6 carriers, including United Healthcare, Aspirus Health Plan and Blue Cross and Blue Shield of Kansas City. PPO plans come from the most carriers, 3. Check the plan with the practice before a visit.
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