LEE W HAAK MD
NPI 1104803923
Family Medicine in Mission, TX
About Lee W Haak Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
LEE W HAAK MD (NPI 1104803923) is an individual family medicine provider in Mission, Texas, licensed in Texas (L2296) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS, is affiliated with South Texas Health System, and maintains a secondary practice location in Mcallen.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Other Identifiers 3
Accepted 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
Lee W Haak Md 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.
Medicare Billing Reassignments
9Medicare enrollment records show Lee Haak reassigns Medicare billing to 9 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Mission, TX 78572
- Reassigned Medicare billing, Texas enrollment
- 5 clinicians in this Medicare group
Mcallen, TX 78503
- Reassigned Medicare billing, Texas enrollment
- 40 clinicians in this Medicare group
Kerrville, TX 78028
- Reassigned Medicare billing, Texas enrollment
- 149 clinicians in this Medicare group
Austin, TX 78735
- Reassigned Medicare billing, Texas enrollment
- 241 clinicians in this Medicare group
Rotan, TX 79546
- Reassigned Medicare billing, Texas enrollment
- 106 clinicians in this Medicare group
Frisco, TX 75033
- Reassigned Medicare billing, Texas enrollment
- 279 clinicians in this Medicare group
Electra, TX 76360
- Reassigned Medicare billing, Texas enrollment
- 155 clinicians in this Medicare group
Lubbock, TX 79401
- Reassigned Medicare billing, Texas enrollment
- 1,338 clinicians in this Medicare group
Lubbock, TX 79401
- Reassigned Medicare billing, Texas enrollment
- 1,439 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 6
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
South Texas Health System
Acute Care Hospitals · Edinburg, TXMission Regional Medical Center
Acute Care Hospitals · Mission, TXRio Grande Regional Hospital
Acute Care Hospitals · Mcallen, TXDoctors Hosptal At Renaissance
Acute Care Hospitals · Edinburg, TXPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 78572 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
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 Lee Haak's NPI number?
The NPI number for Lee Haak is 1104803923. It was assigned to this individual provider in the NPPES registry on December 22, 2005.
Where is Lee Haak located?
Lee Haak practices at 1512 E Griffin Pkwy Ste 2, Mission, TX 78572. The listed phone number is (956) 519-7088.
What is Lee Haak's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Lee Haak enrolled in Medicare?
Yes. Lee Haak 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 organizations bill Medicare for Lee Haak's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Lee Haak reassigns Medicare benefits to 9 organizations: Mario R Anzaldua MD PA (Mission, TX), MD Hospitalists PLLC (Mcallen, TX), Comprehensive Hospitalist Services Of Texas PLLC (Kerrville, TX), Hni Medical Services (Austin, TX), Fisher County Hospital District (Rotan, TX) and 4 more organizations, listed in the Medicare section above. Each 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 Lee Haak's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Lee Haak accept?
Health plans from Blue Cross and Blue Shield of Texas list Lee Haak 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 Lee Haak affiliated with any hospitals?
According to CMS data, Lee Haak is affiliated with South Texas Health System, Mission Regional Medical Center, Rio Grande Regional Hospital and Doctors Hosptal At Renaissance.
When was this NPI record last updated?
The NPPES record for Lee Haak was last updated on October 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 37 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.
# Lee W Haak, MD · NPI 1104803923
Family Medicine physician in Mission, Texas. Individual provider, active in the CMS NPPES registry since December 22, 2005.
## Identity
- **NPI:** 1104803923 (Entity type: Individual)
- **Enumerated:** December 22, 2005
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** L2296 (Texas)
- **Sole proprietor:** No
## Practice location
- **Address:** 1512 E GRIFFIN PKWY STE 2, Mission, TX 78572-2422
- **Phone:** (956) 519-7088 · **Fax:** (956) 519-9816
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 9 organizations under Medicare reassignment (form CMS-855R): Mario R Anzaldua MD PA (NPI 1740626340, Mission, TX); MD Hospitalists PLLC (NPI 1235672809, Mcallen, TX); Comprehensive Hospitalist Services Of Texas PLLC (NPI 1356655062, Kerrville, TX); Hni Medical Services (NPI 1366735169, Austin, TX); Fisher County Hospital District (NPI 1104808112, Rotan, TX); and 4 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Texas A & M University System, Hsc, College Of Medicine, class of 2000
## Record status
- **NPPES last updated:** October 2, 2026
- **Other identifiers:** Other 740054 (TX); Medicaid 146776321 (TX); Medicaid 146776307 (TX)
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Source: [NPI Profile](https://npiprofile.com/npi/1104803923) · Data from the CMS NPPES public registry.