KATHERINE MARGARET FAIR MD
NPI 1629531777
Internal Medicine in Boston, MA
About Katherine Margaret Fair Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KATHERINE MARGARET FAIR MD (NPI 1629531777) is an individual internal medicine provider in Boston, Massachusetts, licensed in Massachusetts (1023397) and active in the NPI registry since April 2019. She is enrolled in Medicare PECOS, maintains a secondary practice location in Burlington, and is a graduate of University Of Pittsburgh School Of Medicine (2019).
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Location 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
Katherine Margaret Fair 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 Reassignment
Medicare enrollment records show Katherine Fair reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Burlington, MA 01805
- Reassigned Medicare billing, Massachusetts enrollment
- Also billed through NPI 1063447316 (Massachusetts)
- 1,574 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02118 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Katherine Fair's NPI number?
The NPI number for Katherine Fair is 1629531777. It was assigned to this individual provider in the NPPES registry on April 7, 2019.
Where is Katherine Fair located?
Katherine Fair practices at 725 Albany St # 9B, Boston, MA 02118. The listed phone number is (617) 638-7480.
What is Katherine Fair's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Katherine Fair enrolled in Medicare?
Yes. Katherine Fair 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 organization bills Medicare for Katherine Fair's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Katherine Fair reassigns Medicare benefits to Lahey Clinic, Inc. (Burlington, MA). The 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 Katherine Fair's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Katherine Fair accept?
Health plans from Anthem Blue Cross and Blue Shield and Taro Health list Katherine Fair 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.
When was this NPI record last updated?
The NPPES record for Katherine Fair was last updated on April 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Katherine Margaret Fair, MD · NPI 1629531777
Internal Medicine physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since April 7, 2019.
## Identity
- **NPI:** 1629531777 (Entity type: Individual)
- **Enumerated:** April 7, 2019
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 1023397 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 725 ALBANY ST # 9B, Boston, MA 02118-3549
- **Phone:** (617) 638-7480
## 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:** Lahey Clinic, Inc. (NPI 1538194980, Burlington, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Pittsburgh School Of Medicine, class of 2019
## Record status
- **NPPES last updated:** April 13, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1629531777) · Data from the CMS NPPES public registry.