Quick answers
- Does Nastran Hashemi accept Medicare assignment?
- Yes. Medicare's clinician data says Nastran Hashemi 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 Nastran Hashemi see?
- In 2024, CMS data shows 261 Original Medicare patients and 5,305 services for Nastran Hashemi. This counts Original Medicare only and measures volume, not quality.
- What is Nastran Hashemi's NPI number?
- 1891009163. 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 Nastran Hashemi, 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 | 261 |
|---|---|
| Services billed to Medicare | 5,305 |
| Different services or procedures | 76 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)1,630 services
- Advance care planning, first 30 minutes (99497)532 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)453 services
- Critical care, first 30-74 minutes (99291)263 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)236 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%
- Arthritis66%
- Diabetes57%
- Ischemic heart disease49%
- Heart failure49%
Hospitals where Nastran Hashemi works
Medicare's Facility Affiliation Data lists Nastran Hashemi 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.
- Henry Mayo Newhall HospitalValencia, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: not listed by Medicare · CCN 050624
Practice locations
Addresses where Nastran Hashemi is enrolled with Medicare (CMS data updated October 2, 2026).
- 23838 Valencia Blvd, Suite 150Valencia, CA 91355 (661) 200‑0066
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Valencia
Clinicians with the same Medicare primary specialty in Valencia, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2003 (23 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1891009163 |
| 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