Ryan Kobayashi, MD, MS
NPI 1215449830 · Pediatric Cardiology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ryan Kobayashi, MD, MS is a Pediatric Cardiology Physician provider in Boston, MA (NPI 1215449830).
Provider details
- NPI number
- 1215449830
- Entity type
- Individual
- Primary specialty
- Pediatric Cardiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, MS
- Sex
- Male
- Sole proprietor
- Yes
- License
- 146289 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
8 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2017-11-05
- Last updated
- 2022-03-01
- Certified
- 2022-03-01
Frequently asked questions
- What is Ryan Kobayashi's NPI number?
- Ryan Kobayashi's National Provider Identifier (NPI) is 1215449830, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ryan Kobayashi's specialty?
- Ryan Kobayashi is listed in the NPPES registry with a primary specialty of Pediatric Cardiology Physician (Allopathic & Osteopathic Physicians).
- Where is Ryan Kobayashi located?
- Ryan Kobayashi's practice location on file with NPPES is 300 Longwood Ave, Boston, MA 02115-5724.
- What is Ryan Kobayashi's phone number?
- The practice phone number listed in the NPPES registry for Ryan Kobayashi is (617) 355-6000.
- Does Ryan Kobayashi accept Medicare?
- Ryan Kobayashi is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ryan Kobayashi's NPI active?
- Yes — Ryan Kobayashi's NPI (1215449830) is active in the NPPES registry as of the last update on 2022-03-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.