DR. STEPHEN DERDAK D.O.
NPI 1659471027
Internal Medicine - Pulmonary Disease in San Antonio, TX
About Dr. Stephen Derdak D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. STEPHEN DERDAK D.O. (NPI 1659471027) is an individual pulmonary disease provider in San Antonio, Texas, licensed in Texas (F6571) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, is affiliated with University Health System, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
Other Identifiers 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
Dr. Stephen Derdak D.o. 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 Stephen Derdak reassigns Medicare billing to 2 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
- 2,397 clinicians in this Medicare group
San Antonio, TX 78207
- Reassigned Medicare billing, Texas enrollment
- 1,129 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
University Health System
Acute Care Hospitals · San Antonio, TXPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 78229 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.
SAN ANTONIO, TX 78229
SAN ANTONIO, TX 78229
SAN ANTONIO, TX 78229
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 Stephen Derdak's NPI number?
The NPI number for Stephen Derdak is 1659471027. It was assigned to this individual provider in the NPPES registry on September 25, 2006.
Where is Stephen Derdak located?
Stephen Derdak practices at 8300 Floyd Curl Dr, San Antonio, TX 78229. The listed phone number is (210) 450-9800.
What is Stephen Derdak's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.
Is Stephen Derdak enrolled in Medicare?
Yes. Stephen Derdak 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 Stephen Derdak's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Stephen Derdak reassigns Medicare benefits to 2 organizations: University Of Texas Health Science Center At San Antonio (San Antonio, TX) and Community Medicine Associates (San Antonio, TX). 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 Stephen Derdak's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Stephen Derdak accept?
Health plans from Baylor Scott and White Health Plan, Blue Cross and Blue Shield of Texas, Community First and Imperial Insurance Companies, Inc. list Stephen Derdak 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 Stephen Derdak affiliated with any hospitals?
According to CMS data, Stephen Derdak is affiliated with University Health System.
When was this NPI record last updated?
The NPPES record for Stephen Derdak was last updated on May 14, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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. Stephen Derdak, D.O. · NPI 1659471027
Pulmonary Disease physician in San Antonio, Texas. Individual provider, active in the CMS NPPES registry since September 25, 2006.
## Identity
- **NPI:** 1659471027 (Entity type: Individual)
- **Enumerated:** September 25, 2006
- **Primary specialty:** Internal Medicine - Pulmonary Disease · taxonomy 207RP1001X
- **State license:** F6571 (Texas)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 8300 FLOYD CURL DR, San Antonio, TX 78229-3931
- **Phone:** (210) 450-9800
## 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): University Of Texas Health Science Center At San Antonio (NPI 1760424873, San Antonio, TX); Community Medicine Associates (NPI 1245313329, San Antonio, TX) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of North Texas Hsc, College Of Osteopathic Med, class of 1980
## Record status
- **NPPES last updated:** May 14, 2024
- **Other identifiers:** Medicaid 148199604 (TX)
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Source: [NPI Profile](https://npiprofile.com/npi/1659471027) · Data from the CMS NPPES public registry.