Dr. Cassidy Bennett Sullivan, MD
- Medicare services, 2022
- 55
- Medicare patients, 2024
- 25
- Part D claims, 2024
- 35
- MIPS score, 2024
- 87
- Hospital affiliations
- 1
- Practice address
- 2801 Atlantic Ave, Long Beach, CA 90806
- Practice phone
- Call (562) 933-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Sullivan's professional email, personal email and mobile number
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Dr. Cassidy Bennett Sullivan is an OB-GYN in Long Beach, California
Dr. Sullivan practices at Long Beach Medical Center in Long Beach, California, part of MemorialCare Health System.
Dr. Sullivan's NPI, 1821483900, was assigned on April 5, 2015. Dr. Sullivan graduated from OU College of Medicine in 2015. Dr. Sullivan's California license number on file is A163333.
- NPI
- 1821483900NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4385074335
- NPI enumeration date
- April 5, 2015
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (562) 933-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Cassidy Bennett Sullivan practices at Long Beach Medical Center in Long Beach, California
Dr. Sullivan's primary practice is Long Beach Medical Center, at 2801 Atlantic Ave, Long Beach, CA 90806 in Los Angeles County. The practice phone is (562) 933-2000.
- Long Beach Medical Center2801 Atlantic Ave, Long Beach, CA 90806 · Los Angeles CountyPhone(562) 933-2000
Source: Dmand AI Affiliation Data
Dr. Cassidy Bennett Sullivan is affiliated with 4 sites of care and 2 medical groups
Dr. Sullivan's primary practice is Long Beach Medical Center in Long Beach, California, part of MemorialCare Health System. The medical group on file is MemorialCare Medical Group. Dmand AI also links Dr. Sullivan to 2 more group practices and clinics, 1 therapy and rehab clinic and 1 medical group, 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. Cassidy Bennett Sullivan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Sullivan practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Long Beach Medical Center | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Cassidy Bennett Sullivan is one of 4,642 OB-GYNs in California
Obstetrics and gynecology is Dr. Sullivan's primary specialty in the NPI Registry, under taxonomy code 207V00000X. Dr. Sullivan is board certified in obstetrics & gynecology by the American Board of Obstetrics and Gynecology. Dr. Sullivan has a license on file in California.
Specialties and state licenses
- Obstetrics and gynecology, CaliforniaPrimary
Clinical focus
Dmand AI lists menopause and UTI among the conditions Dr. Sullivan treats.
OB-GYNs near Dr. Sullivan
Counts of OB-GYNs 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. Cassidy Bennett Sullivan billed Medicare for 55 services in 2022
CMS data shows 55 Medicare services from Dr. Sullivan across 3 procedure codes in 2022, for 25 Medicare patients. Medicare paid $3,733 for them. Every service was in an office.
Dr. Sullivan's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Office and hospital visits
- 2021: 402022: 393%
- Other services
- 2021: 02022: 16
Dr. Sullivan compared with the California median for OB-GYNs, 2022
- Dr. Sullivan
- California median
- Medicare services
- 55vs 585% below
- Medicare patients
- 25vs 5252% below
- Part D claims
- 18vs 3549% below
Medians across 3,823 OB-GYNs in California with Dmand AI profiles that report each measure.
Dr. Sullivan's most billed Medicare procedure codes, 2022
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. Sullivan and other OB-GYNs in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Cassidy Bennett Sullivan treated 25 Medicare patients in 2024, average age 69
CMS counts 25 Medicare patients who saw Dr. Sullivan in 2024. 60% of them have high blood pressure, and 60% have high cholesterol. Their average risk score is 1.28, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Sullivan's median patient age at 35, with 98% women.
Chronic conditions among Dr. Sullivan's Medicare patients, 2024
- High blood pressure60%
- High cholesterol60%
- Arthritis56%
- Mood disorders48%
- Anxiety44%
- Depression44%
Share of Medicare patients with each condition. A patient can have several.
Dr. 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 35
Patient panel by sex, all payers
- Women98%
- Men1%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Cassidy Bennett Sullivan wrote 35 Medicare Part D claims in 2024
In 2024, Dr. Sullivan wrote 35 Medicare Part D claims for 17 patients. 83% of them were for generic drugs. CMS names the drug for 18 of them, across 1 drug with 11 or more claims each, at $2,191 in total drug cost. In 2021, CMS named 23 claims across 2 drugs.
Dr. Sullivan's Part D claims by kind of drug, 2024
- Generic29 claims83%
- Brand-name and other6 claims17%
Dr. Sullivan's most prescribed drugs by claims, 2022
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2021 to 2022
- 2021
- 2022
- Claims for drugs CMS names
- 2021: 232022: 1822%
Drugs named by CMS: 1 in 2022, 2 in 2021.
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. Cassidy Bennett Sullivan scored 87 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 87 out of 100 for Dr. Sullivan for performance year 2024, reported as part of a group. Dr. Sullivan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Sullivan's MIPS scores, performance year 2024
- 87of 100Final score
- 81.2of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 72of 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. Cassidy Bennett Sullivan received $2,802 in industry payments from 2017 to 2025
CMS Open Payments shows 133 general payments to Dr. Sullivan from 28 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 97% of the total. Abbvie Inc. paid the most, $842.
General payments to Dr. Sullivan by program year, 2017 to 2025
General payments to Dr. Sullivan by kind, 2017 to 2025
- Food and beverage$2,71797%
- Education$853%
Companies that paid Dr. Sullivan the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Cassidy Bennett Sullivan graduated from OU College of Medicine
Dr. Sullivan graduated from OU College of Medicine in 2015.
- Medical school
- Board certified in obstetrics & gynecology
Source: Dmand AI Professional Profile Data
Dr. Cassidy Bennett Sullivan accepts plans from 14 insurance carriers
Dr. Sullivan is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Elevance
- Humana
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- +6 more carriersWith a free account
Plan types Dr. Sullivan accepts, by number of carriers
- PPO9
- HMO7
- Medicare7
- EPO4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. Cassidy Bennett 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)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 |
| 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. Cassidy Bennett 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. Cassidy Bennett Sullivan's NPI number?
Dr. Cassidy Bennett Sullivan's NPI number is 1821483900. It was assigned on April 5, 2015, and it is active in the NPI Registry.
What kind of doctor is Dr. Cassidy Bennett Sullivan?
Dr. Cassidy Bennett Sullivan is an OB-GYN in Long Beach, California. The primary specialty in the NPI Registry is Obstetrics & Gynecology Physician (taxonomy code 207V00000X).
Where does Dr. Cassidy Bennett Sullivan practice?
Dr. Sullivan practices at 2801 Atlantic Ave, Long Beach, CA 90806. Dr. Sullivan's primary practice is Long Beach Medical Center in Long Beach, California, part of MemorialCare Health System. Dmand AI also links Dr. Sullivan to 2 group practices and clinics, 1 therapy and rehab clinic and 1 medical group.
What is Dr. Cassidy Bennett Sullivan's office phone number?
The practice phone on file for Dr. Sullivan is (562) 933-2000.
What is Dr. Cassidy Bennett Sullivan's medical license number?
Dr. Sullivan's California license number on file is A163333.
Which hospitals is Dr. Cassidy Bennett Sullivan affiliated with?
Dr. Sullivan practices at Long Beach Medical Center in Long Beach, California.
What medical group is Dr. Cassidy Bennett Sullivan part of?
Dr. Sullivan is linked to MemorialCare Medical Group. Dmand AI links Dr. Sullivan to 1 more medical group.
Does Dr. Cassidy Bennett Sullivan accept Medicare?
Yes. CMS data shows Dr. Sullivan billed Medicare for 55 services in 2022, and Dr. Sullivan accepts Medicare assignment.
What is Dr. Cassidy Bennett Sullivan's MIPS score?
Dr. Sullivan's MIPS final score for performance year 2024 is 87 out of 100, reported as part of a group.
How many Medicare patients does Dr. Cassidy Bennett Sullivan see?
CMS counts 25 Medicare patients who saw Dr. Sullivan in 2024, with an average age of 69.
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Is Dr. Cassidy Bennett Sullivan board certified?
Yes. Dr. Sullivan is board certified in obstetrics & gynecology by the American Board of Obstetrics and Gynecology.
What services does Dr. Cassidy Bennett Sullivan bill to Medicare?
In 2022, Dr. Sullivan's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and medicare service (G0101).
Where did Dr. Cassidy Bennett Sullivan go to medical school?
Dr. Sullivan graduated from OU College of Medicine in 2015.
What drugs does Dr. Cassidy Bennett Sullivan prescribe most?
In 2022 Medicare Part D data, Dr. Sullivan's most prescribed drugs by claims were Estradiol.
Has Dr. Cassidy Bennett Sullivan received payments from drug or device companies?
CMS Open Payments shows $2,802 in general payments to Dr. Sullivan from 28 companies from 2017 to 2025. The largest total came from Abbvie Inc.
How long has Dr. Cassidy Bennett Sullivan been practicing?
Dr. Sullivan graduated from medical school in 2015, 11 years ago.
What insurance does Dr. Cassidy Bennett Sullivan accept?
Dr. Sullivan is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
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