DAVID R ZIEHR MD
NPI 1447631874
Internal Medicine - Critical Care Medicine in Boston, MA
About David R Ziehr Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DAVID R ZIEHR MD (NPI 1447631874) is an individual critical care medicine provider in Boston, Massachusetts, licensed in Massachusetts (273801) and active in the NPI registry since June 2015. He is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and maintains 4 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Locations 4
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
David R Ziehr 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 David Ziehr reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02115
- Reassigned Medicare billing, Massachusetts enrollment
- 4,574 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
Newton, MA 02462
- Reassigned Medicare billing, Massachusetts enrollment
- 992 clinicians in this Medicare group
Dover, NH 03820
- Reassigned Medicare billing, New Hampshire enrollment
- 559 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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Massachusetts General Hospital
Acute Care Hospitals · Boston, MANewton-Wellesley Hospital
Acute Care Hospitals · Newton, 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
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 David Ziehr's NPI number?
The NPI number for David Ziehr is 1447631874. It was assigned to this individual provider in the NPPES registry on June 11, 2015.
Where is David Ziehr located?
David Ziehr practices at Massachusetts General Hospital 55 Fruit Street, Boston, MA 02114. The listed phone number is (617) 726-2674.
What is David Ziehr's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.
Is David Ziehr enrolled in Medicare?
Yes. David Ziehr 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 David Ziehr's services?
According to the CMS Revalidation Reassignment List (October 2026 release), David Ziehr reassigns Medicare benefits to 5 organizations: Brigham & Womens Physicians Organization Inc (Boston, MA), The General Hospital Corporation (Boston, MA), Massachusetts General Physicians Organization Inc (Boston, MA), Mass General Brigham Medical Group Suburban Massachusetts Inc (Newton, MA) and Wentworth Douglass Physician Corporation (Dover, NH). 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 David Ziehr's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does David Ziehr accept?
Health plans from Taro Health list David Ziehr 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 David Ziehr affiliated with any hospitals?
According to CMS data, David Ziehr is affiliated with Massachusetts General Hospital and Newton-Wellesley Hospital.
When was this NPI record last updated?
The NPPES record for David Ziehr was last updated on October 31, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.
# David R Ziehr, MD · NPI 1447631874
Critical Care Medicine physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since June 11, 2015.
## Identity
- **NPI:** 1447631874 (Entity type: Individual)
- **Enumerated:** June 11, 2015
- **Primary specialty:** Internal Medicine - Critical Care Medicine · taxonomy 207RC0200X
- **State license:** 273801 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** MASSACHUSETTS GENERAL HOSPITAL, 55 FRUIT STREET, Boston, MA 02114
- **Phone:** (617) 726-2674
## 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): Brigham & Womens Physicians Organization Inc (NPI 1033535497, Boston, MA); The General Hospital Corporation (NPI 1023049236, Boston, MA); Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA); Mass General Brigham Medical Group Suburban Massachusetts Inc (NPI 1538191218, Newton, MA); Wentworth Douglass Physician Corporation (NPI 1336751825, Dover, NH) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Harvard Medical School, class of 2015
## Record status
- **NPPES last updated:** October 31, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1447631874) · Data from the CMS NPPES public registry.