ALLISON KELLOGG M.D.
NPI 1225425440
Obstetrics & Gynecology in San Antonio, TX
About Allison Kellogg M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALLISON KELLOGG M.D. (NPI 1225425440) is an individual obstetrics & gynecology provider in San Antonio, Texas, licensed in Texas (R9990) and active in the NPI registry since April 2015. She is enrolled in Medicare PECOS, maintains a secondary practice location in Truckee, and is a graduate of University Of Texas Medical School At San Antonio (2015).
NPPES Registry Identity
Specialties & Licenses
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
Allison Kellogg 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
3Medicare enrollment records show Allison Kellogg reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Antonio, TX 78229
- Reassigned Medicare billing, Texas enrollment
- 64 clinicians in this Medicare group
Austin, TX 78758
- Reassigned Medicare billing, Texas enrollment
- Medicare enrollment name: Obhg Texas Holdings PA
- 998 clinicians in this Medicare group
Truckee, CA 96161
- Reassigned Medicare billing, California enrollment
- Also billed through NPI 1538265780 (California)
- 129 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 78258 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.
SAN ANTONIO, TX 78258
SAN ANTONIO, TX 78258
SAN ANTONIO, TX 78258
SAN ANTONIO, TX 78258
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 Allison Kellogg's NPI number?
The NPI number for Allison Kellogg is 1225425440. It was assigned to this individual provider in the NPPES registry on April 26, 2015.
Where is Allison Kellogg located?
Allison Kellogg practices at 520 Madison Oak Dr, San Antonio, TX 78258. The listed phone number is (210) 297-4075.
What is Allison Kellogg's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Allison Kellogg enrolled in Medicare?
Yes. Allison Kellogg 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 Allison Kellogg's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Allison Kellogg reassigns Medicare benefits to 3 organizations: Lone Star Ob/Gyn Associates, P.A. (San Antonio, TX), Obhg Texas Holdings, P.A. (Austin, TX) and Tahoe Forest Hospital District (Truckee, CA). 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 Allison Kellogg's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Allison Kellogg accept?
Health plans from Blue Cross and Blue Shield of Texas list Allison Kellogg 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.
When was this NPI record last updated?
The NPPES record for Allison Kellogg was last updated on May 6, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.
# Allison Kellogg, M.D. · NPI 1225425440
Obstetrics & Gynecology physician in San Antonio, Texas. Individual provider, active in the CMS NPPES registry since April 26, 2015.
## Identity
- **NPI:** 1225425440 (Entity type: Individual)
- **Enumerated:** April 26, 2015
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** R9990 (Texas)
- **Sole proprietor:** No
## Practice location
- **Address:** 520 MADISON OAK DR, San Antonio, TX 78258-3913
- **Phone:** (210) 297-4075
## 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): Lone Star Ob/Gyn Associates, P.A. (NPI 1063441921, San Antonio, TX); Obhg Texas Holdings, P.A. (NPI 1083917769, Austin, TX); Tahoe Forest Hospital District (NPI 1538689583, Truckee, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Texas Medical School At San Antonio, class of 2015
## Record status
- **NPPES last updated:** May 6, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1225425440) · Data from the CMS NPPES public registry.