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ALLEN SONSTEIN MD
NPI 1831194489
Internal Medicine in Austin, TX

Active since June 19, 2005PECOS Enrolled
7201 MANCHACA RD, STE B, AUSTIN, TX 78745(512) 443-3577(512) 445-6027 Get Directions Write a Review

NPPES record last updated: January 20, 2014. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Allen Sonstein Md NPPES

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

ALLEN SONSTEIN MD (NPI 1831194489) is an individual internal medicine provider in Austin, Texas, licensed in Texas (E3462) and active in the NPI registry since June 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1831194489
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameALLEN SONSTEINCredential: MD
Location Address7201 MANCHACA RD, STE BAustin, TX 78745-5259
Mailing Address7201 Manchaca Rd, Ste BAustin, TX 78745-5259 · (512) 443-3577 · Fax (512) 445-6027
Phone(512) 443-3577
Fax(512) 445-6027
Sole ProprietorNo
Enumeration DateJune 19, 2005
Last NPPES UpdateJanuary 20, 2014
✔ NPI 1831194489 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in TX · E3462
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
7201 MANCHACA RD, Austin, TX 78745
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Other Identifiers 1

Medicare ID-Type Unspecified80V440TX

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Allen Sonstein Md 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 Allen Sonstein reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Adult Care Of Austin PA
Same address
Internal Medicine
7201 MANCHACA RD STE B
Austin, TX 78745
  • Reassigned Medicare billing, Texas enrollment
  • 4 clinicians in this Medicare group
NPI 1619982147 (512) 443-3577

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 78745 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
$131.95 typical visit price
range $57.88 – $174.00
Typical copayment $32.98 (range $14.47 – $43.50)
Most-billed visit code 99204
Established Patient
$101.65 typical visit price
range $18.88 – $142.23
Typical copayment $25.41 (range $4.72 – $35.55)
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 6

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DEBRA MCDOWELL PT MSHP
Physical Therapist
7201 MANCHACA RD, SUITE B
AUSTIN, TX 78745
Travis County (512) 443-3577
JOHN A PRATT LCSW
Social Worker (Clinical)
7201 MANCHACA RD
AUSTIN, TX 78745
Travis County (512) 443-3577
LISA DANIELE BOUILLION AGNP-C
Nurse Practitioner (Adult Health)
7201 MANCHACA RD
AUSTIN, TX 78745
Travis County (512) 443-3577
LINDA HARGROVE RN C-FNP
Nurse Practitioner (Family)
7201 MANCHACA RD, STE B
AUSTIN, TX 78745
Travis County (512) 443-3577
BARBARA CARSON FNP
Nurse Practitioner (Family)
7201 MANCHACA RD, STE B
AUSTIN, TX 78745
Travis County (512) 443-3577
MICHAEL G PETERSEN PA-C
Physician Assistant
7201 MANCHACA RD, STE B
AUSTIN, TX 78745
Travis County (512) 443-3577

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 Allen Sonstein's NPI number?

The NPI number for Allen Sonstein is 1831194489. It was assigned to this individual provider in the NPPES registry on June 19, 2005.

Where is Allen Sonstein located?

Allen Sonstein practices at 7201 Manchaca Rd Ste B, Austin, TX 78745. The listed phone number is (512) 443-3577.

What is Allen Sonstein's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Allen Sonstein enrolled in Medicare?

Yes. Allen Sonstein is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Allen Sonstein's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Allen Sonstein reassigns Medicare benefits to Adult Care Of Austin PA (Austin, 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 Allen Sonstein'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 Allen Sonstein was last updated on January 20, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.