DR. KATHRYN E HIMMELSTEIN MD
NPI 1548752140
Internal Medicine - Infectious Disease in Boston, MA
About Dr. Kathryn E Himmelstein Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. KATHRYN E HIMMELSTEIN MD (NPI 1548752140) is an individual infectious disease provider in Boston, Massachusetts, licensed in Massachusetts (1013330) and active in the NPI registry since May 2018. She is enrolled in Medicare PECOS, is affiliated with Boston Medical Center, 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. Kathryn E Himmelstein 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 Kathryn Himmelstein reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02118
- Reassigned Medicare billing, Massachusetts enrollment
- 573 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
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
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.
Boston Medical Center
Acute Care Hospitals · Boston, MAPhysician 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.
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 Kathryn Himmelstein's NPI number?
The NPI number for Kathryn Himmelstein is 1548752140. It was assigned to this individual provider in the NPPES registry on May 31, 2018.
Where is Kathryn Himmelstein located?
Kathryn Himmelstein practices at 801 Massachusetts Ave, # 2, Boston, MA 02118. The listed phone number is (617) 414-7019.
What is Kathryn Himmelstein's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.
Is Kathryn Himmelstein enrolled in Medicare?
Yes. Kathryn Himmelstein 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 Kathryn Himmelstein's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Kathryn Himmelstein reassigns Medicare benefits to 3 organizations: Evans Medical Foundation, Inc. (Boston, MA), 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 Kathryn Himmelstein's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Kathryn Himmelstein accept?
Health plans from Taro Health and WellSense Health Plan list Kathryn Himmelstein 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 Kathryn Himmelstein affiliated with any hospitals?
According to CMS data, Kathryn Himmelstein is affiliated with Boston Medical Center.
When was this NPI record last updated?
The NPPES record for Kathryn Himmelstein was last updated on July 11, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Dr. Kathryn E Himmelstein, MD · NPI 1548752140
Infectious Disease physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since May 31, 2018.
## Identity
- **NPI:** 1548752140 (Entity type: Individual)
- **Enumerated:** May 31, 2018
- **Primary specialty:** Internal Medicine - Infectious Disease · taxonomy 207RI0200X
- **State license:** 1013330 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 801 MASSACHUSETTS AVE, # 2, Boston, MA 02118
- **Phone:** (617) 414-7019 · **Fax:** (617) 414-2875
## 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): Evans Medical Foundation, Inc. (NPI 1912954124, Boston, MA); 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:** Perelman School Of Med At The University Of Pennsylvania, class of 2018
## Record status
- **NPPES last updated:** July 11, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1548752140) · Data from the CMS NPPES public registry.