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DR. KARL F FREY DDS
NPI 1821091398
Dentist - Oral and Maxillofacial Surgery in Harlingen, TX

Active since May 27, 2005PECOS EnrolledAccepts Medicare Assignment
1622 N ED CAREY DR, HARLINGEN, TX 78550(956) 428-4258(956) 428-4292 Get Directions Write a Review

NPPES record last updated: March 14, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Karl F Frey Dds NPPES

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

DR. KARL F FREY DDS (NPI 1821091398) is an individual oral and maxillofacial surgery provider in Harlingen, Texas, licensed in Texas (12285) and active in the NPI registry since May 2005. He is enrolled in Medicare PECOS, is affiliated with Vhs Harlingen Hospital Company Llc, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1821091398
Entity TypeIndividualMale
Primary Taxonomy1223S0112X
Provider Legal NameDR. KARL F FREYCredential: DDS
Location Address1622 N ED CAREY DRHarlingen, TX 78550-8286
Mailing Address1622 N Ed Carey DrHarlingen, TX 78550-8286 · (956) 428-4258 · Fax (956) 428-4292
Phone(956) 428-4258
Fax(956) 428-4292
Sole ProprietorNo
Medical School CMSUniversity Of Texas Hsc At Houston School Of DentistryGraduated 1981
Enumeration DateMay 27, 2005
Last NPPES UpdateMarch 14, 2025
NPPES CertifiedMarch 14, 2025
✔ NPI 1821091398 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentist · Oral and Maxillofacial SurgeryDental Providers
Taxonomy Code1223S0112X
License✔ Licensed in TX · 12285
Definition
An oral and maxillofacial surgery dentist specialized in the diagnosis, surgical and adjunctive treatment of diseases, injuries and defects involving both the functional and esthetic aspects of the hard and soft tissues of the oral and maxillofacial region.
1622 N ED CAREY DR, Harlingen, TX 78550
Open in Google Maps ↗

Secondary Practice Locations 2

Location 1100 E Pecan BlvdMcAllen, TX 78501-9555 · Phone (956) 682-5292
Location 22330 Central BlvdBrownsville, TX 78520-8714 · Phone (956) 542-2870

Other Identifiers 4

Medicaid130590609TX
Medicaid130590611TX
Medicaid130590608TX
Medicaid130590610TX

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections 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 and accepts Medicare assignment

Dr. Karl F Frey Dds 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 ID9436248804
PECOS Enrollment IDI20110831000814
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 Karl Frey reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Rio Grande Oral & Maxillofacial Surgery, P.C.
Same address
Oral and Maxillofacial Surgery
1622 N ED CAREY DR
Harlingen, TX 78550
  • Reassigned Medicare billing, Texas enrollment
  • 2 clinicians in this Medicare group
NPI 1417088972 (956) 428-4258

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.

Vhs Harlingen Hospital Company LLC

Acute Care Hospitals · Harlingen, TX
2/5 CMS rating
OwnershipProprietary
CMS Certification Number450033
Location2101 Pease StHarlingen, TX 78550 · Cameron County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 78550 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
$84.92 typical visit price
range $54.84 – $166.88
Typical copayment $21.23 (range $13.71 – $41.72)
Most-billed visit code 99203
Established Patient
$68.55 typical visit price
range $17.52 – $136.11
Typical copayment $17.13 (range $4.38 – $34.02)
Most-billed visit code 99213
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 2

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

RIO GRANDE ORAL & MAXILLOFACIAL SURGERY, P.C.
Dentist (Oral and Maxillofacial Surgery)
1622 N ED CAREY DR
HARLINGEN, TX 78550
Cameron County (956) 428-4258
DR. AUXILLIAN LUCIANO STROIA DDS
Dentist (Oral and Maxillofacial Surgery)
1622 N ED CAREY DR
HARLINGEN, TX 78550
Cameron County (956) 428-4258

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 Karl Frey's NPI number?

The NPI number for Karl Frey is 1821091398. It was assigned to this individual provider in the NPPES registry on May 27, 2005.

Where is Karl Frey located?

Karl Frey practices at 1622 N Ed Carey Dr, Harlingen, TX 78550. The listed phone number is (956) 428-4258.

What is Karl Frey's specialty?

The primary specialty registered for this NPI is Dentist, specializing in Oral and Maxillofacial Surgery, with taxonomy code 1223S0112X.

Is Karl Frey enrolled in Medicare?

Yes. Karl Frey 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 Karl Frey's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Karl Frey reassigns Medicare benefits to Rio Grande Oral & Maxillofacial Surgery, P.C. (Harlingen, 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 Karl Frey's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Karl Frey accept?

Health plans from Ambetter Health, Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections and Ambetter from Superior HealthPlan and 15 other insurers list Karl Frey 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 Karl Frey affiliated with any hospitals?

According to CMS data, Karl Frey is affiliated with Vhs Harlingen Hospital Company LLC.

When was this NPI record last updated?

The NPPES record for Karl Frey was last updated on March 14, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.