Quick answers
- Does Alex F. Herrera accept Medicare assignment?
- Yes. Medicare's clinician data says Alex F. Herrera 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 Alex F. Herrera see?
- In 2024, CMS data shows 129 Original Medicare patients and 468 services for Alex F. Herrera. This counts Original Medicare only and measures volume, not quality.
- What is Alex F. Herrera's NPI number?
- 1275761553. 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 Alex F. Herrera, 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 | 129 |
|---|---|
| Services billed to Medicare | 468 |
| Different services or procedures | 11 |
| Participating Medicare provider | Yes |
| Average age of these patients | 69 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)149 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)110 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)73 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)66 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)22 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 cholesterol70%
- High blood pressure61%
- Arthritis47%
- Diabetes36%
- Chronic kidney disease34%
- Ischemic heart disease31%
Practice locations
Addresses where Alex F. Herrera is enrolled with Medicare (CMS data updated October 2, 2026).
- 1500 Duarte RdDuarte, CA 91010 (626) 256‑4673
- 1500 E Duarte RdDuarte, CA 91010
- 209 Fair Oaks AveSouth Pasadena, CA 91030 (626) 396‑2900
Group practices
Medicare enrollment lists Alex F. Herrera as a member of this group (CMS data updated October 2, 2026).
- City of Hope Medical Foundation982 clinicians in the group
Specialties
- Hematologyprimary
Other hematologists in Duarte
Clinicians with the same Medicare primary specialty in Duarte, CA — not a recommendation.
Other clinicians in City of Hope Medical Foundation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Harvard Medical School |
| Graduation year | 2009 (17 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1275761553 |
| 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