DR. THEODORE MARCUS FRIEDMAN M.D.
NPI 1164608451
Pathology - Anatomic Pathology & Clinical Pathology in Fairfax, VA
About Dr. Theodore Marcus Friedman M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. THEODORE MARCUS FRIEDMAN M.D. (NPI 1164608451) is an individual anatomic pathology & clinical pathology provider in Fairfax, Virginia, licensed in Virginia (0101249423) and active in the NPI registry since January 2008. He is enrolled in Medicare PECOS, is affiliated with Inova Alexandria Hospital, and is a graduate of Geisel School Of Medicine At Dartmouth (2003).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 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
Dr. Theodore Marcus Friedman M.d. 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 Theodore Friedman reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Vienna, VA 22180
- Reassigned Medicare billing, Virginia and District of Columbia enrollments
- Also billed through NPI 1669511051 (District of Columbia)
- 2,379 clinicians in this Medicare group
Falls Church, VA 22042
- Reassigned Medicare billing, District of Columbia and Virginia enrollments
- 57 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 10
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 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Inova Alexandria Hospital
Acute Care Hospitals · Alexandria, VAInova Fairfax Hospital
Acute Care Hospitals · Falls Church, VAInova Fair Oaks Hospital
Acute Care Hospitals · Fairfax, VAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 22033 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
FAIRFAX, VA 22033
FAIRFAX, VA 22033
FAIRFAX, VA 22033
FAIRFAX, VA 22033
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 Theodore Friedman's NPI number?
The NPI number for Theodore Friedman is 1164608451. It was assigned to this individual provider in the NPPES registry on January 16, 2008.
Where is Theodore Friedman located?
Theodore Friedman practices at 3600 Joseph Siewick Dr Dept Of Pathology, Inova Fair Oaks Hospital, Fairfax, VA 22033. The listed phone number is (703) 391-3654.
What is Theodore Friedman's specialty?
The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology & Clinical Pathology, with taxonomy code 207ZP0102X.
Is Theodore Friedman enrolled in Medicare?
Yes. Theodore Friedman 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 Theodore Friedman's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Theodore Friedman reassigns Medicare benefits to 2 organizations: Inova Health Care Services (Vienna, VA) and Inova Health Care Services - Pathology (Falls Church, VA). 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 Theodore Friedman's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Theodore Friedman accept?
Health plans from Oscar Health list Theodore Friedman 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 Theodore Friedman affiliated with any hospitals?
According to CMS data, Theodore Friedman is affiliated with Inova Alexandria Hospital, Inova Fairfax Hospital and Inova Fair Oaks Hospital.
When was this NPI record last updated?
The NPPES record for Theodore Friedman was last updated on March 25, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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. Theodore Marcus Friedman, M.D. · NPI 1164608451
Anatomic Pathology & Clinical Pathology physician in Fairfax, Virginia. Individual provider, active in the CMS NPPES registry since January 16, 2008.
## Identity
- **NPI:** 1164608451 (Entity type: Individual)
- **Enumerated:** January 16, 2008
- **Primary specialty:** Pathology - Anatomic Pathology & Clinical Pathology · taxonomy 207ZP0102X
- **State license:** 0101249423 (Virginia)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 3600 JOSEPH SIEWICK DR, DEPT OF PATHOLOGY, INOVA FAIR OAKS HOSPITAL, Fairfax, VA 22033-1709
- **Phone:** (703) 391-3654
## 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): Inova Health Care Services (NPI 1275886418, Vienna, VA); Inova Health Care Services - Pathology (NPI 1427369578, Falls Church, VA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Geisel School Of Medicine At Dartmouth, class of 2003
## Record status
- **NPPES last updated:** March 25, 2015
- **Other identifiers:** Medicaid 169935001 (AR); Medicare PIN 5H226 (AR)
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Source: [NPI Profile](https://npiprofile.com/npi/1164608451) · Data from the CMS NPPES public registry.