RYAN DIN MD
NPI 1679139133
Internal Medicine - Allergy & Immunology in Boston, MA
About Ryan Din Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
RYAN DIN MD (NPI 1679139133) is an individual allergy & immunology provider in Boston, Massachusetts, licensed in Massachusetts (1020183) and active in the NPI registry since May 2019. He is enrolled in Medicare PECOS, is affiliated with Beth Israel Deaconess Medical Center, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Locations 2
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Ryan Din Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
5Medicare enrollment records show Ryan Din reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02111
- Reassigned Medicare billing, Massachusetts enrollment
- 5 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,234 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,360 clinicians in this Medicare group
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- Also billed through NPI 1497151773 (Massachusetts)
- 1,006 clinicians in this Medicare group
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- 2,579 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Beth Israel Deaconess Medical Center
Acute Care Hospitals · Boston, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02111 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BOSTON, MA 02111
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Ryan Din's NPI number?
The NPI number for Ryan Din is 1679139133. It was assigned to this individual provider in the NPPES registry on May 10, 2019.
Where is Ryan Din located?
Ryan Din practices at 75 Kneeland St Fl 1, Boston, MA 02111. The listed phone number is (617) 804-6767.
What is Ryan Din's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Allergy & Immunology, with taxonomy code 207RA0201X.
Is Ryan Din enrolled in Medicare?
Yes. Ryan Din is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Ryan Din's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ryan Din reassigns Medicare benefits to 5 organizations: Boston Food Allergy Center LLC Bi Network (Boston, MA), The General Hospital Corporation (Boston, MA), Massachusetts General Physicians Organization Inc (Boston, MA), Associated Physicians Of Harvard Medical Faculty Physicians At Beth Is (Boston, MA) and Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc (Boston, MA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Ryan Din's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Ryan Din accept?
Health plans from Anthem Blue Cross and Blue Shield and Taro Health list Ryan Din as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Ryan Din affiliated with any hospitals?
According to CMS data, Ryan Din is affiliated with Beth Israel Deaconess Medical Center.
When was this NPI record last updated?
The NPPES record for Ryan Din was last updated on February 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Ryan Din, MD · NPI 1679139133
Allergy & Immunology physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since May 10, 2019.
## Identity
- **NPI:** 1679139133 (Entity type: Individual)
- **Enumerated:** May 10, 2019
- **Primary specialty:** Internal Medicine - Allergy & Immunology · taxonomy 207RA0201X
- **State license:** 1020183 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 75 KNEELAND ST FL 1, Boston, MA 02111-1901
- **Phone:** (617) 804-6767 · **Fax:** (877) 726-8492
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Boston Food Allergy Center LLC Bi Network (NPI 1710523147, Boston, MA); The General Hospital Corporation (NPI 1023049236, Boston, MA); Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA); Associated Physicians Of Harvard Medical Faculty Physicians At Beth Is (NPI 1952358533, Boston, MA); Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc (NPI 1194765438, Boston, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Harvard Medical School, class of 2024
## Record status
- **NPPES last updated:** February 6, 2026
- **Other identifiers:** Other 13-3971298
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Source: [NPI Profile](https://npiprofile.com/npi/1679139133) · Data from the CMS NPPES public registry.