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Dr. Sarah E. Kollar, DO
NPI1649624891PAC ID3678867645
- Publications
- 4
- Hospital affiliations
- 1
- Industry payments
- $116
- Medical groups
- 2
- State license
- 1
- Practice address
- 111 Michigan Ave, NW, Washington, DC 20010
- Practice phone
- Call (202) 476-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Kollar'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. Sarah E. Kollar is a pediatric cardiology physician in Washington, District of Columbia
Dr. Kollar practices at Children's National Hospital in Washington, District of Columbia, part of Children's National Hospital.
Dr. Kollar's NPI, 1649624891, was assigned on April 13, 2016. Dr. Kollar holds District of Columbia license DO034919.
NPI and contact details
- NPI
- 1649624891NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3678867645
- NPI enumeration date
- April 13, 2016
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (202) 476-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 36
- Medical school graduation
- 2016
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Sarah E. Kollar practices at Children's National Hospital in Washington, District of Columbia
Dr. Kollar's primary practice is Children's National Hospital, at 111 Michigan Ave, NW, Washington, DC 20010 in The District County. The practice phone is (202) 476-5000.
- Children's National Hospital111 Michigan Ave, NW, Washington, DC 20010 · The District CountyPhone(202) 476-5000
Source: Dmand AI Affiliation Data
Dr. Sarah E. Kollar is affiliated with 2 sites of care and 2 medical groups
Dr. Kollar's primary practice is Children's National Hospital in Washington, District of Columbia, part of Children's National Hospital. The medical group on file is Children's National Hospital. Dmand AI also links Dr. Kollar to 1 more dialysis center and 1 medical group, each named with a free account.
Children's National Hospital1 dialysis centerName with a free account1 medical groupName with a free account
See all 4 affiliations for Dr. KollarSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Sarah E. Kollar's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kollar practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Children's National Hospital | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every hospital where Dr. Kollar practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across Children's National Hospital and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Sarah E. Kollar is one of 56 pediatric cardiology physicians in District of Columbia
Pediatric cardiology is Dr. Kollar's primary specialty in the NPI Registry, under taxonomy code 2080P0202X. Dr. Kollar is licensed in District of Columbia.
Specialties and state licenses
- Pediatric cardiology, District of ColumbiaPrimary
Pediatric cardiology physicians near Dr. Kollar
Counts of pediatric cardiology physicians with a Dmand AI profile, by place and practice. Each opens the list.
56pediatric cardiology physicians in District of Columbia56pediatric cardiology physicians in Washington46pediatric cardiology physicians at Children's National Hospital
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Sarah E. Kollar's patients have a median age of 10
Across all payers, Dmand AI patient panel data puts Dr. Kollar's median patient age at 10, with 51% women.
Dr. Kollar's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 10
Patient panel by sex, all payers
- Women51%
- Men49%
Source: Dmand AI Patient Panel Data
How Dr. Sarah E. Kollar takes part in Medicare
Dr. Kollar 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)
Dr. Sarah E. Kollar has 4 publications on record
Dmand AI links 4 papers to Dr. Kollar, published from 2022 to 2024. 2022 was the busiest year, with 3. The most frequent topics are Heart Ventricles. Dr. Kollar's most frequent co-authors are Laura Jean Olivieri, MD, Michelle Udine, MD and Michael Hanwei He, MD.
Papers4
Years published2022 to 2024
Topics Dr. Kollar writes about most
- Heart Ventricles
Dr. Kollar's most frequent co-authors
- Laura Jean Olivieri, MD3 shared papers
- Michelle Udine, MD2 shared papers
- Michael Hanwei He, MD1 shared paper
Recent publications by Dr. Kollar
Am J Physiol Heart Circ Physiol
Heart VentriclesHemodynamicsPulmonary Valve Insufficiency
See who Dr. Kollar researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Kollar works with, so you can find a warm path to the right pediatric cardiology physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Sarah E. Kollar received $116 in industry payments from 2023 to 2025
CMS Open Payments shows 2 general payments to Dr. Kollar from 2 drug and device companies from 2023 to 2025. Education make up the largest share, 83% of the total. Sanofi and Genzyme US Companies paid the most, $97.
General payments to Dr. Kollar by program year, 2023 to 2025
General payments to Dr. Kollar by kind, 2023 to 2025
$116in total
- Education$9783%
- Food and beverage$1917%
Companies that paid Dr. Kollar the most, 2023 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Sarah E. Kollar'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 patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Sarah E. Kollar
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. Sarah E. Kollar's NPI number?
Dr. Sarah E. Kollar's NPI number is 1649624891. It was assigned on April 13, 2016, and it is active in the NPI Registry.
What kind of doctor is Dr. Sarah E. Kollar?
Dr. Sarah E. Kollar is a pediatric cardiology physician in Washington, District of Columbia. The primary specialty in the NPI Registry is Pediatric Cardiology Physician (taxonomy code 2080P0202X).
Where does Dr. Sarah E. Kollar practice?
Dr. Kollar practices at 111 Michigan Ave, NW, Washington, DC 20010. Dr. Kollar's primary practice is Children's National Hospital in Washington, District of Columbia, part of Children's National Hospital. Dmand AI also links Dr. Kollar to 1 dialysis center and 1 medical group.
What is Dr. Sarah E. Kollar's office phone number?
The practice phone on file for Dr. Kollar is (202) 476-5000.
What is Dr. Sarah E. Kollar's medical license number?
Dr. Kollar holds District of Columbia license DO034919.
Which hospitals is Dr. Sarah E. Kollar affiliated with?
Dr. Kollar practices at Children's National Hospital in Washington, District of Columbia.
What medical group is Dr. Sarah E. Kollar part of?
Dr. Kollar is linked to Children's National Hospital. Dmand AI links Dr. Kollar to 1 more medical group.
Does Dr. Sarah E. Kollar accept Medicare?
Yes. CMS lists Dr. Kollar as accepting Medicare assignment.
Has Dr. Sarah E. Kollar received payments from drug or device companies?
CMS Open Payments shows $116 in general payments to Dr. Kollar from 2 companies from 2023 to 2025. The largest total came from Sanofi and Genzyme US Companies.
How long has Dr. Sarah E. Kollar been practicing?
Dr. Kollar graduated from medical school in 2016, 10 years ago.
Does Dr. Sarah E. Kollar do research?
Dmand AI links 4 publications to Dr. Kollar, published from 2022 to 2024.
Who does Dr. Sarah E. Kollar publish with?
Dr. Kollar's most frequent co-authors are Laura Jean Olivieri, MD (3 shared papers), Michelle Udine, MD (2 shared papers) and Michael Hanwei He, MD (1 shared paper).
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