Dr. Ryan L. Kobayashi, MD, MS
- Publications
- 26
- Hospital affiliations
- 1
- Medical group
- 1
- State licenses
- 2
- Year NPI issued
- 2017
- Practice address
- 300 Longwood Avenue, Boston, MA 02115
- Practice phone
- Call (617) 735-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Kobayashi'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. Ryan L. Kobayashi is a pediatric cardiology physician in Boston, Massachusetts
Dr. Kobayashi practices at Boston Children's Hospital in Boston, Massachusetts, part of The Children's Hospital.
Dr. Kobayashi's NPI, 1215449830, was assigned on November 5, 2017. Dr. Kobayashi holds Massachusetts license 274639.
- NPI
- 1215449830NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3476947417
- NPI enumeration date
- November 5, 2017
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (617) 735-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- 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. Ryan L. Kobayashi practices at Boston Children's Hospital in Boston, Massachusetts
Dr. Kobayashi's primary practice is Boston Children's Hospital, at 300 Longwood Avenue, Boston, MA 02115 in Suffolk County. The practice phone is (617) 735-6000.
- Boston Children's Hospital300 Longwood Avenue, Boston, MA 02115 · Suffolk CountyPhone(617) 735-6000
Source: Dmand AI Affiliation Data
Dr. Ryan L. Kobayashi is affiliated with 2 sites of care and 1 medical group
Dr. Kobayashi's primary practice is Boston Children's Hospital in Boston, Massachusetts, part of The Children's Hospital. The medical group on file is Boston Children's Benderson Family Heart Center. Dmand AI also links Dr. Kobayashi to 1 more dialysis center, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Ryan L. Kobayashi's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kobayashi practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Boston Children's Hospital | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across The Children's Hospital and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Ryan L. Kobayashi is one of 109 pediatric cardiology physicians in Massachusetts
Pediatric cardiology is Dr. Kobayashi's primary specialty in the NPI Registry, under taxonomy code 2080P0202X. Dmand AI has Dr. Kobayashi's licenses on file in 2 states: Massachusetts and California.
Specialties and state licenses
- Pediatric cardiology, MassachusettsPrimary
- Pediatrics, California
Pediatric cardiology physicians near Dr. Kobayashi
Counts of pediatric cardiology 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. Ryan L. Kobayashi's patients have a median age of 13
Across all payers, Dmand AI patient panel data puts Dr. Kobayashi's median patient age at 13, with 42% women.
Dr. Kobayashi's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 13
Patient panel by sex, all payers
- Women42%
- Men57%
Source: Dmand AI Patient Panel Data
How Dr. Ryan L. Kobayashi takes part in Medicare
Dr. Kobayashi 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. Ryan L. Kobayashi has 26 publications on record
Dmand AI links 26 papers to Dr. Kobayashi, published from 2015 to 2025. 2024 was the busiest year, with 8. The most frequent topics are Anticoagulants, Cardiopulmonary Resuscitation and Extracorporeal Membrane Oxygenation. Dr. Kobayashi has published most often in ASAIO J. Dr. Kobayashi's most frequent co-authors are Francis E. Fynn-Thompson, MD, Elizabeth D. Blume, MD and Matthew J. O'Connor, MD.
Dr. Kobayashi's papers by year, 2015 to 2025
Topics Dr. Kobayashi writes about most
- Anticoagulants
- Cardiopulmonary Resuscitation
- Extracorporeal Membrane Oxygenation
- Heart-Assist Devices
- Heart Arrest
- Heart Defects, Congenital
- Heart Diseases
- Heart Failure
Dr. Kobayashi's most frequent co-authors
- Francis E. Fynn-Thompson, MD5 shared papers
- Elizabeth D. Blume, MD4 shared papers
- Matthew J. O'Connor, MD3 shared papers
Recent publications by Dr. Kobayashi
See who Dr. Kobayashi researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Kobayashi 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
Sources for Dr. Ryan L. Kobayashi'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 |
| 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. Ryan L. Kobayashi
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. Ryan L. Kobayashi's NPI number?
Dr. Ryan L. Kobayashi's NPI number is 1215449830. It was assigned on November 5, 2017, and it is active in the NPI Registry.
What kind of doctor is Dr. Ryan L. Kobayashi?
Dr. Ryan L. Kobayashi is a pediatric cardiology physician in Boston, Massachusetts. The primary specialty in the NPI Registry is Pediatric Cardiology Physician (taxonomy code 2080P0202X).
Where does Dr. Ryan L. Kobayashi practice?
Dr. Kobayashi practices at 300 Longwood Avenue, Boston, MA 02115. Dr. Kobayashi's primary practice is Boston Children's Hospital in Boston, Massachusetts, part of The Children's Hospital. Dmand AI also links Dr. Kobayashi to 1 dialysis center.
What is Dr. Ryan L. Kobayashi's office phone number?
The practice phone on file for Dr. Kobayashi is (617) 735-6000.
What is Dr. Ryan L. Kobayashi's medical license number?
Dr. Kobayashi holds Massachusetts license 274639, one of the licenses on file in 2 states.
Which states has Dr. Ryan L. Kobayashi been licensed in?
Dmand AI has state licenses on file for Dr. Kobayashi in Massachusetts and California.
Which hospitals is Dr. Ryan L. Kobayashi affiliated with?
Dr. Kobayashi practices at Boston Children's Hospital in Boston, Massachusetts.
What medical group is Dr. Ryan L. Kobayashi part of?
Dr. Kobayashi is linked to Boston Children's Benderson Family Heart Center.
Does Dr. Ryan L. Kobayashi accept Medicare?
Yes. CMS lists Dr. Kobayashi as accepting Medicare assignment.
How long has Dr. Ryan L. Kobayashi been practicing?
Dr. Kobayashi graduated from medical school in 2015, 11 years ago.
Does Dr. Ryan L. Kobayashi do research?
Dmand AI links 26 publications to Dr. Kobayashi, published from 2015 to 2025.
Who does Dr. Ryan L. Kobayashi publish with?
Dr. Kobayashi's most frequent co-authors are Francis E. Fynn-Thompson, MD (5 shared papers), Elizabeth D. Blume, MD (4 shared papers) and Matthew J. O'Connor, MD (3 shared papers).
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