DR. KATHARINE E BLACK MD
NPI 1124165063
Internal Medicine - Pulmonary Disease in Boston, MA
About Dr. Katharine E Black Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. KATHARINE E BLACK MD (NPI 1124165063) is an individual pulmonary disease provider in Boston, Massachusetts, licensed in Massachusetts (226949) and active in the NPI registry since January 2007. She is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and maintains a secondary practice location in Boston.
NPPES Registry Identity
Specialties & Licenses 2
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
Dr. Katharine E Black 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
3Medicare enrollment records show Katharine Black reassigns Medicare billing to 3 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
- 6,360 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,234 clinicians in this Medicare group
Boston, MA 02115
- Reassigned Medicare billing, Massachusetts enrollment
- 4,574 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.
Areas of Expertise CMS Part B claims 3
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, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02114 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 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
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 Katharine Black's NPI number?
The NPI number for Katharine Black is 1124165063. It was assigned to this individual provider in the NPPES registry on January 31, 2007.
Where is Katharine Black located?
Katharine Black practices at 55 Fruit St Bul 148, Boston, MA 02114. The listed phone number is (617) 726-1721.
What is Katharine Black's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.
Is Katharine Black enrolled in Medicare?
Yes. Katharine Black 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 Katharine Black's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Katharine Black reassigns Medicare benefits to 3 organizations: Massachusetts General Physicians Organization Inc (Boston, MA), The General Hospital Corporation (Boston, MA) and Brigham & Womens 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 Katharine Black's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Katharine Black accept?
Health plans from Taro Health list Katharine Black 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 Katharine Black affiliated with any hospitals?
According to CMS data, Katharine Black is affiliated with Massachusetts General Hospital.
When was this NPI record last updated?
The NPPES record for Katharine Black was last updated on January 23, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# Dr. Katharine E Black, MD · NPI 1124165063
Pulmonary Disease physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since January 31, 2007.
## Identity
- **NPI:** 1124165063 (Entity type: Individual)
- **Enumerated:** January 31, 2007
- **Primary specialty:** Internal Medicine - Pulmonary Disease · taxonomy 207RP1001X
- **State license:** 226949 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 55 FRUIT ST, BUL 148, Boston, MA 02114-2621
- **Phone:** (617) 726-1721
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA); The General Hospital Corporation (NPI 1023049236, Boston, MA); Brigham & Womens Physicians Organization Inc (NPI 1033535497, Boston, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Harvard Medical School, class of 2003
## Record status
- **NPPES last updated:** January 23, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1124165063) · Data from the CMS NPPES public registry.