Quick answers
- Does Melissa R. Isbell accept Medicare assignment?
- Yes. Medicare's clinician data says Melissa R. Isbell 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 Melissa R. Isbell see?
- In 2024, CMS data shows 510 Original Medicare patients and 5,199 services for Melissa R. Isbell. This counts Original Medicare only and measures volume, not quality.
- What is Melissa R. Isbell's NPI number?
- 1881660660. 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 Melissa R. Isbell, 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 | 510 |
|---|---|
| Services billed to Medicare | 5,199 |
| Different services or procedures | 45 |
| Participating Medicare provider | Yes |
| Average age of these patients | 68 |
Most frequent services
- Injection, epoetin alfa, (for non-esrd use), 1000 units (J0885)1,038 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)656 services
- Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month (99490)647 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)639 services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)527 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).
- High blood pressure75%
- High cholesterol75%
- Chronic kidney disease75%
- Diabetes61%
- Arthritis43%
- Ischemic heart disease42%
Hospitals where Melissa R. Isbell works
Medicare's Facility Affiliation Data lists Melissa R. Isbell at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Baptist Medical CenterSan Antonio, TX · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 450058
- Methodist HospitalSan Antonio, TX · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 450388
- Methodist Hospital Stone OakSan Antonio, TX · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 670055
Practice locations
Addresses where Melissa R. Isbell is enrolled with Medicare (CMS data updated October 2, 2026).
- 4458 Medical Dr, Suite 205San Antonio, TX 78229 (210) 614‑1515
Group practices
Medicare enrollment lists Melissa R. Isbell as a member of this group (CMS data updated October 2, 2026).
- Renal Associates, P.A.40 clinicians in the group
Specialties
- Nephrologyprimary
Other nephrologists in San Antonio
Clinicians with the same Medicare primary specialty in San Antonio, TX — not a recommendation.
Other clinicians in Renal Associates, P.A.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1990 (36 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1881660660 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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