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TERRANCE W. BREEN M.D.
NPI 1841202280
Anesthesiology in San Diego, CA

Active since August 13, 2006PECOS EnrolledAccepts Medicare Assignment
79.24/100
CMS Quality Rating
3626 RUFFIN RD, SAN DIEGO, CA 92123(858) 565-9666(858) 565-9441 Get Directions Write a Review

NPPES record last updated: November 30, 2007. Verified against the NPPES registry weekly; last sync: November 08, 2026.

About Terrance W. Breen M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

TERRANCE W. BREEN M.D. (NPI 1841202280) is an individual anesthesiology provider in San Diego, California, licensed in California (C52003) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1985).

NPPES Registry Identity

NPI1841202280
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameTERRANCE W. BREENCredential: M.D.
Location Address3626 RUFFIN RDSan Diego, CA 92123-1810
Mailing Address3626 Ruffin RdSan Diego, CA 92123-1810 · (858) 565-9666 · Fax (858) 565-9441
Phone(858) 565-9666
Fax(858) 565-9441
Sole ProprietorNo
Medical School CMSOtherGraduated 1985
Enumeration DateAugust 13, 2006
Last NPPES UpdateNovember 30, 2007
✔ NPI 1841202280 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in CA · C52003
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
3626 RUFFIN RD, San Diego, CA 92123
Open in Google Maps ↗

Other Identifiers 4

Other00C520030CA · Blue Shield Of Ca
Medicare UPING95114CA
Medicaid00C520030CA
Medicare PINWC52003ACA

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

Terrance W. Breen 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.

PECOS PAC ID7214953868
PECOS Enrollment IDI20051021000893
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Terrance Breen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Anesthesia Service Medical Group
Same address
Anesthesiology
3626 RUFFIN RD
San Diego, CA 92123
  • Reassigned Medicare billing, California enrollment
  • 269 clinicians in this Medicare group
NPI 1053354233 (858) 565-9666

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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.

79.24/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality75.57
Improvement Activities40

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.

THOMAS J. PIETUCH M.D.
Anesthesiology
3626 RUFFIN RD
SAN DIEGO, CA 92123
San Diego County (858) 565-9666
DR. JEFFREY KOJI SAKIHARA M.D.
Anesthesiology
3626 RUFFIN RD
SAN DIEGO, CA 92123
San Diego County (858) 565-9666
MARK SETH CHRISTOFFERSON MD
Anesthesiology
3626 RUFFIN RD
SAN DIEGO, CA 92123
San Diego County (858) 565-9666
QUINN S HUME DO
Anesthesiology
3626 RUFFIN RD
SAN DIEGO, CA 92123
San Diego County (858) 565-9666
STEVEN A. SALTZ M.D.
Anesthesiology
3626 RUFFIN RD
SAN DIEGO, CA 92123
San Diego County (858) 565-9666
TATYANA FELDMAN MD
Anesthesiology
3626 RUFFIN RD
SAN DIEGO, CA 92123
San Diego County (858) 565-9666
DR. JAMES BRIAN BILLYS MD
Anesthesiology
3626 RUFFIN RD
SAN DIEGO, CA 92123
San Diego County (858) 565-9666
DARCI J. TOM M.D.
Anesthesiology
3626 RUFFIN RD
SAN DIEGO, CA 92123
San Diego County (858) 565-9666

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 Terrance Breen's NPI number?

The NPI number for Terrance Breen is 1841202280. It was assigned to this individual provider in the NPPES registry on August 13, 2006.

Where is Terrance Breen located?

Terrance Breen practices at 3626 Ruffin Rd, San Diego, CA 92123. The listed phone number is (858) 565-9666.

What is Terrance Breen's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Terrance Breen enrolled in Medicare?

Yes. Terrance Breen 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 Terrance Breen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Terrance Breen reassigns Medicare benefits to Anesthesia Service Medical Group (San Diego, CA). 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 Terrance Breen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Terrance Breen was last updated on November 30, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.