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DR. ALEXANDER PAIVA D.O.
NPI 1104131846
Internal Medicine in San Antonio, TX

Active since August 17, 2010PECOS EnrolledAccepts Medicare Assignment
1715 MCCULLOUGH AVE, SAN ANTONIO, TX 78212(210) 225-5323(210) 225-7505 Get Directions Write a Review

NPPES record last updated: July 23, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jan 3, 2025, Dec 24, 2024, Apr 7, 2022 (3 updates tracked since 2022).

About Dr. Alexander Paiva D.o. NPPES

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

DR. ALEXANDER PAIVA D.O. (NPI 1104131846) is an individual internal medicine provider in San Antonio, Texas, licensed in Texas (V4165) and active in the NPI registry since August 2010. He is enrolled in Medicare PECOS, maintains 3 additional practice locations, and is a graduate of Other (2022).

NPPES Registry Identity

NPI1104131846
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. ALEXANDER PAIVACredential: D.O.
Location Address1715 MCCULLOUGH AVESan Antonio, TX 78212-4046
Mailing Address1715 Mccullough AveSan Antonio, TX 78212-4046 · (210) 225-5323 · Fax (210) 225-7505
Phone(210) 225-5323
Fax(210) 225-7505
Sole ProprietorNo
Medical School CMSOtherGraduated 2022
Enumeration DateAugust 17, 2010
Last NPPES UpdateJuly 23, 20253 updates tracked since enumeration
NPPES CertifiedJuly 23, 2025
✔ NPI 1104131846 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 · V4165
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.
1715 MCCULLOUGH AVE, San Antonio, TX 78212
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Secondary Practice Locations 3

Location 14301 Broadway # Cpo121San Antonio, TX 78209-6318 · Phone (210) 283-6438
Location 24502 Medical DrSan Antonio, TX 78229-4402 · Phone (210) 358-4000
Location 37400 Merton Minter St Bldg 1San Antonio, TX 78229-4404 · Phone (210) 617-5300

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. Alexander Paiva 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.

PECOS PAC ID3678080066
PECOS Enrollment IDI20250730000848
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 Alexander Paiva reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Wellmed Medical Group, PA
5.5 mi
Internal Medicine
4438 CENTERVIEW
San Antonio, TX 78228
  • Reassigned Medicare billing, Texas enrollment
  • 762 clinicians in this Medicare group
NPI 1437156486 (210) 280-0040

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 78212 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 13

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

DR. WESLEY ALLEN CLARKSON D.O.
Internal Medicine (Cardiovascular Disease)
1715 MCCULLOUGH AVE, FL 2
SAN ANTONIO, TX 78212
Bexar County (210) 408-1613
MRS. JANICE WENGYE LEUNG DNP
Nurse Practitioner (Gerontology)
1715 MCCULLOUGH AVE
SAN ANTONIO, TX 78212
Bexar County (210) 225-5323
CARMINA M FUSCO DPM
Podiatrist (Foot Surgery)
1715 MCCULLOUGH AVE, 2ND FLOOR
SAN ANTONIO, TX 78212
Bexar County (210) 732-3668
RAMON LUIS FIGUEROA MD
Family Medicine
1715 MCCULLOUGH AVE
SAN ANTONIO, TX 78212
Bexar County (210) 225-5323
DR. JAIME MORENO MD
Internal Medicine
1715 MCCULLOUGH AVE
SAN ANTONIO, TX 78212
Bexar County (210) 225-5323
ALEKSANDRA DUKHAN
Family Medicine
1715 MCCULLOUGH AVE
SAN ANTONIO, TX 78212
Bexar County (210) 225-5323
RACHEL PAIGE WALKER MD
Family Medicine
1715 MCCULLOUGH AVE
SAN ANTONIO, TX 78212
Bexar County (210) 225-5323
LISA MARIE LEFFLER MD
Hospitalist
1715 MCCULLOUGH AVE
SAN ANTONIO, TX 78212
Bexar County (210) 225-5323

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 Alexander Paiva's NPI number?

The NPI number for Alexander Paiva is 1104131846. It was assigned to this individual provider in the NPPES registry on August 17, 2010.

Where is Alexander Paiva located?

Alexander Paiva practices at 1715 Mccullough Ave, San Antonio, TX 78212. The listed phone number is (210) 225-5323.

What is Alexander Paiva's specialty?

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

Is Alexander Paiva enrolled in Medicare?

Yes. Alexander Paiva 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 organization bills Medicare for Alexander Paiva's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alexander Paiva reassigns Medicare benefits to Wellmed Medical Group, PA (San Antonio, 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 Alexander Paiva'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 Alexander Paiva was last updated on July 23, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.