CAROLINE L SOKOL MD, PHD
NPI 1528295060
Allergy & Immunology in Boston, MA
About Caroline L Sokol Md, Phd NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CAROLINE L SOKOL MD, PHD (NPI 1528295060) is an individual allergy & immunology provider in Boston, Massachusetts, licensed in Massachusetts (254470) and active in the NPI registry since June 2009. She is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and is a graduate of Yale University School Of Medicine (2009).
NPPES Registry Identity
Specialties & Licenses 2
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
Caroline L Sokol Md, Phd 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
2Medicare enrollment records show Caroline Sokol reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
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
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.
Massachusetts General Hospital
Acute Care Hospitals · Boston, MAOther Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BOSTON, MA 02114
BOSTON, MA 02114
BOSTON, MA 02114
BOSTON, MA 02114
BOSTON, MA 02114
BOSTON, MA 02114
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 Caroline Sokol's NPI number?
The NPI number for Caroline Sokol is 1528295060. It was assigned to this individual provider in the NPPES registry on June 11, 2009.
Where is Caroline Sokol located?
Caroline Sokol practices at Massachusetts General Hospital 55 Fruit St., Boston, MA 02114. The listed phone number is (617) 726-3850.
What is Caroline Sokol's specialty?
The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.
Is Caroline Sokol enrolled in Medicare?
Yes. Caroline Sokol 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 Caroline Sokol's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Caroline Sokol reassigns Medicare benefits to 2 organizations: The General Hospital Corporation (Boston, MA) and Massachusetts General Physicians Organization 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 Caroline Sokol's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Caroline Sokol accept?
Health plans from Taro Health list Caroline Sokol 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 Caroline Sokol affiliated with any hospitals?
According to CMS data, Caroline Sokol is affiliated with Massachusetts General Hospital.
When was this NPI record last updated?
The NPPES record for Caroline Sokol was last updated on May 17, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 years 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.
# Caroline L Sokol, MD, PHD · NPI 1528295060
Allergy & Immunology physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since June 11, 2009.
## Identity
- **NPI:** 1528295060 (Entity type: Individual)
- **Enumerated:** June 11, 2009
- **Primary specialty:** Allergy & Immunology · taxonomy 207K00000X
- **State license:** 254470 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT ST., Boston, MA 02114
- **Phone:** (617) 726-3850
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): The General Hospital Corporation (NPI 1023049236, Boston, MA); Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Yale University School Of Medicine, class of 2009
## Record status
- **NPPES last updated:** May 17, 2013
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Source: [NPI Profile](https://npiprofile.com/npi/1528295060) · Data from the CMS NPPES public registry.