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MIRIAM ALICIA PAZ SIERRA MD
NPI 1780378257
Internal Medicine in Lubbock, TX

Active since June 06, 2023PECOS EnrolledAccepts Medicare Assignment
3601 4TH ST RM 2B210, LUBBOCK, TX 79430(806) 743-2978(806) 743-1599 Get Directions Write a Review

NPPES record last updated: July 28, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jul 28, 2026, Jun 6, 2023 (2 updates tracked since 2023).

About Miriam Alicia Paz Sierra Md NPPES

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

MIRIAM ALICIA PAZ SIERRA MD (NPI 1780378257) is an individual internal medicine provider in Lubbock, Texas, licensed in Texas (W7106) and active in the NPI registry since June 2023. She is enrolled in Medicare PECOS, is affiliated with University Medical Center, and maintains a secondary practice location in Lubbock.

NPPES Registry Identity

NPI1780378257
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameMIRIAM ALICIA PAZ SIERRACredential: MD
Location Address3601 4TH ST RM 2B210Lubbock, TX 79430-0002
Mailing Address3601 4th St Rm 2b210Lubbock, TX 79430-0002 · (806) 743-2978 · Fax (806) 743-1599
Phone(806) 743-2978
Fax(806) 743-1599
Sole ProprietorYes
Medical School CMSOtherGraduated 2012
Enumeration DateJune 6, 2023
Last NPPES UpdateJuly 28, 20262 updates tracked since enumeration
NPPES CertifiedJuly 28, 2026
✔ NPI 1780378257 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 · W7106
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.
3601 4TH ST RM 2B210, Lubbock, TX 79430
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Secondary Practice Location 1

Location 1602 Indiana AveLubbock, TX 79415-3364 · Phone (806) 743-9098 · Fax (806) 743-9085

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas.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

Miriam Alicia Paz Sierra 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.

PECOS PAC ID941767891
PECOS Enrollment IDI20260811001312
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 Miriam Paz Sierra reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Lubbock County Hospital District
5.7 mi
Hospitalist
602 INDIANA AVE
Lubbock, TX 79415
  • Reassigned Medicare billing, Texas enrollment
  • 64 clinicians in this Medicare group
NPI 1487993630 (806) 775-8200

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.

University Medical Center

Acute Care Hospitals · Lubbock, TX
2/5 CMS rating
OwnershipGovernment - Hospital District or Authority
CMS Certification Number450686
Location602 Indiana AvenueLubbock, TX 79415 · Lubbock County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 79430 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 Miriam Paz Sierra's NPI number?

The NPI number for Miriam Paz Sierra is 1780378257. It was assigned to this individual provider in the NPPES registry on June 6, 2023.

Where is Miriam Paz Sierra located?

Miriam Paz Sierra practices at 3601 4th St Rm 2b210, Lubbock, TX 79430. The listed phone number is (806) 743-2978.

What is Miriam Paz Sierra's specialty?

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

Is Miriam Paz Sierra enrolled in Medicare?

Yes. Miriam Paz Sierra 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 Miriam Paz Sierra's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Miriam Paz Sierra reassigns Medicare benefits to Lubbock County Hospital District (Lubbock, 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 Miriam Paz Sierra's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Miriam Paz Sierra accept?

Health plans from Blue Cross and Blue Shield of Texas list Miriam Paz Sierra 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 Miriam Paz Sierra affiliated with any hospitals?

According to CMS data, Miriam Paz Sierra is affiliated with University Medical Center.

When was this NPI record last updated?

The NPPES record for Miriam Paz Sierra was last updated on July 28, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.