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DR. ROBERT DONOVAN BUTTER D.O.
NPI 1265490809
Preventive Medicine - Undersea and Hyperbaric Medicine in San Marcos, TX

Active since May 03, 2006PECOS Enrolled
1301 WONDER WORLD DR, SAN MARCOS, TX 78666(512) 353-8979 Get Directions Write a Review

NPPES record last updated: August 21, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Robert Donovan Butter D.o. NPPES

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

DR. ROBERT DONOVAN BUTTER D.O. (NPI 1265490809) is an individual undersea and hyperbaric medicine provider in San Marcos, Texas, licensed in Texas (H2278) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS and maintains a secondary practice location in San Antonio.

NPPES Registry Identity

NPI1265490809
Entity TypeIndividualMale
Primary Taxonomy2083P0011X
Provider Legal NameDR. ROBERT DONOVAN BUTTERCredential: D.O.
Location Address1301 WONDER WORLD DRSan Marcos, TX 78666-7533
Mailing Address5224 75th St Ste DLubbock, TX 79424-2525 · (806) 712-1096 · Fax (806) 771-2093
Phone(512) 353-8979
Sole ProprietorNo
Enumeration DateMay 3, 2006
Last NPPES UpdateAugust 21, 2023
NPPES CertifiedAugust 21, 2023
✔ NPI 1265490809 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPreventive Medicine · Undersea and Hyperbaric MedicineAllopathic & Osteopathic Physicians
Taxonomy Code2083P0011X
License✔ Licensed in TX · H2278
Definition
A specialist who treats decompression illness and diving accident cases and uses hyperbaric oxygen therapy to treat such conditions as carbon monoxide poisoning, gas gangrene, non-healing wounds, tissue damage from radiation and burns and bone infections. This specialist also serves as consultant to other physicians in all aspects of hyperbaric chamber operations and assesses risks and applies appropriate standards to prevent disease and disability in divers and other persons working in altered atmospheric conditions.
Also ListedEmergency MedicineTaxonomy 207P00000X · License H2278 (TX)
1301 WONDER WORLD DR, San Marcos, TX 78666
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Secondary Practice Location 1

Location 111212 State Highway 151, Plaza 2 Suite 300San Antonio, TX 78251-4498 · Phone (210) 703-8454 · Fax (210) 703-8461

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas, CHRISTUS Health Plan, Community First.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Robert Donovan Butter D.o. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Robert Butter reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Physicians Unity
345 mi
Family Medicine
5224 75TH ST STE D
Lubbock, TX 79424
  • Reassigned Medicare billing, Texas enrollment
  • 43 clinicians in this Medicare group
NPI 1679878268 (806) 712-1096

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 78666 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$126.40 typical visit price
range $54.84 – $166.88
Typical copayment $31.60 (range $13.71 – $41.72)
Most-billed visit code 99204
Established Patient
$97.05 typical visit price
range $17.52 – $136.11
Typical copayment $24.26 (range $4.38 – $34.02)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

KATHERINE ALISON SIDES MD
Emergency Medicine
1301 WONDER WORLD DR, CENTRAL TEXAS MEDICAL CENTER
SAN MARCOS, TX 78666
Hays County (512) 353-8979
ROCKIE LANE DUGGER CRNA
Nurse Anesthetist, Certified Registered
1301 WONDER WORLD DR
SAN MARCOS, TX 78666
Hays County (512) 353-8979
DOUGLAS S SMITH M.D.
Radiology (Diagnostic Radiology)
1301 WONDER WORLD DR
SAN MARCOS, TX 78666
Hays County (512) 396-8565
MS. MILDRED SIMON MOZARA CRNA
Nurse Anesthetist, Certified Registered
1301 WONDER WORLD DR
SAN MARCOS, TX 78666
Hays County (512) 353-8979
COLLEEN HUGHES
Physical Therapist
1301 WONDER WORLD DR
SAN MARCOS, TX 78666
Hays County (512) 353-8979
RADIOLOGY ASSOCIATES OF SAN MARCOS
Radiology (Diagnostic Radiology)
1301 WONDER WORLD DR
SAN MARCOS, TX 78666
Hays County (512) 396-8565
JOSE OVIDIO PENA JR. MD
Emergency Medicine
1301 WONDER WORLD DR
SAN MARCOS, TX 78666
Hays County (512) 753-3796
CAREY MICHELLE SWEET ARNP-C
Nurse Practitioner
1301 WONDER WORLD DR
SAN MARCOS, TX 78666
Hays County (512) 753-3874

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 Robert Butter's NPI number?

The NPI number for Robert Butter is 1265490809. It was assigned to this individual provider in the NPPES registry on May 3, 2006.

Where is Robert Butter located?

Robert Butter practices at 1301 Wonder World Dr, San Marcos, TX 78666. The listed phone number is (512) 353-8979.

What is Robert Butter's specialty?

The primary specialty registered for this NPI is Preventive Medicine, specializing in Undersea and Hyperbaric Medicine, with taxonomy code 2083P0011X.

Is Robert Butter enrolled in Medicare?

Yes. Robert Butter is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Robert Butter's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Robert Butter reassigns Medicare benefits to Physicians Unity (Lubbock, TX). 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 Robert Butter's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Robert Butter accept?

Health plans from Blue Cross and Blue Shield of Texas, CHRISTUS Health Plan and Community First list Robert Butter 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 Robert Butter was last updated on August 21, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.