Quick answers
- Does Carlos L. Martinez Ii accept Medicare assignment?
- Yes. Medicare's clinician data says Carlos L. Martinez Ii 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 Carlos L. Martinez Ii see?
- In 2024, CMS data shows 405 Original Medicare patients and 13,758 services for Carlos L. Martinez Ii. This counts Original Medicare only and measures volume, not quality.
- What is Carlos L. Martinez Ii's NPI number?
- 1366476897. 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 Carlos L. Martinez Ii, 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 | 405 |
|---|---|
| Services billed to Medicare | 13,758 |
| Different services or procedures | 29 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Injection, denosumab, 1 mg (J0897)1,140 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)588 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)156 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)44 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)39 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 cholesterol75%
- Arthritis75%
- High blood pressure73%
- Anxiety34%
- Depression26%
- Chronic kidney disease26%
Hospitals where Carlos L. Martinez Ii works
Medicare's Facility Affiliation Data lists Carlos L. Martinez Ii 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.
- Kaleida HealthBuffalo, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330005
- Mercy Hospital of BuffaloBuffalo, NY · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 330279
- Olean General HospitalOlean, NY · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 330103
- Sisters of Charity HospitalBuffalo, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330078
- Strong Memorial HospitalRochester, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330285
Practice locations
Addresses where Carlos L. Martinez Ii is enrolled with Medicare (CMS data updated October 2, 2026).
- 30 N Union RdWilliamsville, NY 14221 (716) 747‑4000
Group practices
Medicare enrollment lists Carlos L. Martinez Ii as a member of this group (CMS data updated October 2, 2026).
- Preferred Physician Care PC27 clinicians in the group
Specialties
- Rheumatologyprimary
- Internal Medicinealso
Other rheumatologists in Williamsville
Clinicians with the same Medicare primary specialty in Williamsville, NY — not a recommendation.
Other clinicians in Preferred Physician Care PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1982 (44 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1366476897 |
| 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