Quick answers
- Does Coreen R. Martinez accept Medicare assignment?
- Yes. Medicare's clinician data says Coreen R. Martinez accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Coreen R. Martinez see?
- In 2024, CMS data shows 143 Original Medicare patients and 217 services for Coreen R. Martinez. This counts Original Medicare only and measures volume, not quality.
- What is Coreen R. Martinez's NPI number?
- 1821639923. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Coreen R. Martinez, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 143 |
|---|---|
| Services billed to Medicare | 217 |
| Different services or procedures | 3 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)196 services
- Telephone medical discussion with physician, 11-20 minutes (99442)14 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)75%
- High blood pressure74%
- High cholesterol74%
- Arthritis45%
- Osteoporosis40%
- Anxiety26%
Practice locations
Addresses where Coreen R. Martinez is enrolled with Medicare (CMS data updated October 2, 2026).
- 1515 Holcombe BlvdHouston, TX 77030 (713) 792‑2121
Group practices
Medicare enrollment lists Coreen R. Martinez as a member of this group (CMS data updated October 2, 2026).
- Physicians Referral Service2,765 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Houston
Clinicians with the same Medicare primary specialty in Houston, TX — not a recommendation.
Other clinicians in Physicians Referral Service
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2019 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1821639923 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians