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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MATTHEW GERARD RETZLOFF M.D.
NPI 1659362218
Obstetrics & Gynecology - Reproductive Endocrinology in San Antonio, TX

Active since November 02, 2005PECOS Enrolled
7707 EWING HALSELL, SUITE 103, SAN ANTONIO, TX 78229(210) 692-0577(210) 692-1210 Get Directions Write a Review

NPPES record last updated: September 25, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Sep 25, 2026, Aug 21, 2024, Aug 13, 2024 (3 updates tracked since 2024).

About Matthew Gerard Retzloff M.d. NPPES

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

MATTHEW GERARD RETZLOFF M.D. (NPI 1659362218) is an individual reproductive endocrinology provider in San Antonio, Texas, licensed in Texas (J8736) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1659362218
Entity TypeIndividualMale
Primary Taxonomy207VE0102X
Provider Legal NameMATTHEW GERARD RETZLOFFCredential: M.D.
Location Address7707 EWING HALSELL, SUITE 103San Antonio, TX 78229-4040
Mailing Address7707 Ewing Halsell Dr Ste 103San Antonio, TX 78229-4040 · (210) 692-0577 · Fax (210) 692-1210
Phone(210) 692-0577
Fax(210) 692-1210
Sole ProprietorNo
Enumeration DateNovember 2, 2005
Last NPPES UpdateSeptember 25, 20263 updates tracked since enumeration
NPPES CertifiedSeptember 25, 2026
✔ NPI 1659362218 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyObstetrics & Gynecology · Reproductive EndocrinologyAllopathic & Osteopathic Physicians
Taxonomy Code207VE0102X
Licenses✔ Licensed in TX · J8736✔ Licensed in ND · 24888
Definition
An obstetrician/gynecologist who is capable of managing complex problems relating to reproductive endocrinology and infertility.
Also ListedObstetrics & GynecologyTaxonomy 207V00000X · License J8736 (TX)
7707 EWING HALSELL, SUITE 103, San Antonio, TX 78229
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Sanford Health Plan, Security Health Plan, Wellmark Health Plan of Iowa, Inc. and more.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Matthew Gerard Retzloff M.d. 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 Matthew Retzloff reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Sanford Medical Center
959 mi
Rural Health
108 S MAIN ST
Lennox, SD 57039
  • Reassigned Medicare billing, South Dakota enrollment
  • 1,097 clinicians in this Medicare group
NPI 1518284264 (605) 647-2841

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 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.

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.

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 Matthew Retzloff's NPI number?

The NPI number for Matthew Retzloff is 1659362218. It was assigned to this individual provider in the NPPES registry on November 2, 2005.

Where is Matthew Retzloff located?

Matthew Retzloff practices at 7707 Ewing Halsell, Suite 103, San Antonio, TX 78229. The listed phone number is (210) 692-0577.

What is Matthew Retzloff's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Reproductive Endocrinology, with taxonomy code 207VE0102X.

Is Matthew Retzloff enrolled in Medicare?

Yes. Matthew Retzloff is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Matthew Retzloff's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Matthew Retzloff reassigns Medicare benefits to Sanford Medical Center (Lennox, SD). 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 Matthew Retzloff's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Matthew Retzloff accept?

Health plans from Sanford Health Plan, Security Health Plan, Wellmark Health Plan of Iowa, Inc. and Wellmark of South Dakota, Inc. list Matthew Retzloff 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 Matthew Retzloff was last updated on September 25, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 28 days 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.