DR. ABIGAIL DE GUZMAN D.O.
NPI 1427219302
Internal Medicine in Knoxville, TN
About Dr. Abigail De Guzman D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ABIGAIL DE GUZMAN D.O. (NPI 1427219302) is an individual internal medicine provider in Knoxville, Tennessee, licensed in Tennessee (1996) and active in the NPI registry since June 2008. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Abigail De Guzman D.o. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Abigail De Guzman reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Knoxville, TN 37919
- Reassigned Medicare billing, Tennessee enrollment
- 1,003 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 37919 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.
KNOXVILLE, TN 37919
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 Abigail De Guzman's NPI number?
The NPI number for Abigail De Guzman is 1427219302. It was assigned to this individual provider in the NPPES registry on June 23, 2008.
Where is Abigail De Guzman located?
Abigail De Guzman practices at 2240 Sutherland Ave Suite 104, Knoxville, TN 37919. The listed phone number is (865) 909-0090.
What is Abigail De Guzman's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Abigail De Guzman enrolled in Medicare?
Yes. Abigail De Guzman is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Abigail De Guzman's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Abigail De Guzman reassigns Medicare benefits to Summit Medical Group, PLLC (Knoxville, TN). 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 Abigail De Guzman'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 Abigail De Guzman was last updated on May 31, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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. Abigail De Guzman, D.O. · NPI 1427219302
Internal Medicine physician in Knoxville, Tennessee. Individual provider, active in the CMS NPPES registry since June 23, 2008.
## Identity
- **NPI:** 1427219302 (Entity type: Individual)
- **Enumerated:** June 23, 2008
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 1996 (Tennessee)
- **Sole proprietor:** No
## Practice location
- **Address:** 2240 SUTHERLAND AVE, SUITE 104, Knoxville, TN 37919-2333
- **Phone:** (865) 909-0090 · **Fax:** (865) 909-9883
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Summit Medical Group, PLLC (NPI 1528378726, Knoxville, TN), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** May 31, 2011
- **Other identifiers:** Medicare PIN 103I117640 (TN); Medicaid 1520000 (TN)
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Source: [NPI Profile](https://npiprofile.com/npi/1427219302) · Data from the CMS NPPES public registry.