Quick answers
- Which hospitals does Yousuf A. Gaffar work at?
- Medicare's official clinician data lists Yousuf A. Gaffar at 5 hospitals: AdventHealth Avista, AdventHealth Castle Rock, AdventHealth Littleton, AdventHealth Parker and AdventHealth Porter. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Yousuf A. Gaffar see patients?
- Medicare's clinician data lists 8 practice locations, including Columbia, MD, Denver, CO and Castle Rock, CO. Call before your visit to confirm the address.
- What is Yousuf A. Gaffar's specialty?
- Medicare lists Hematology/Oncology as the primary specialty, and also Internal Medicine.
- Does Yousuf A. Gaffar accept Medicare assignment?
- Yes. Medicare's clinician data says Yousuf A. Gaffar accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does Yousuf A. Gaffar offer telehealth?
- Medicare's clinician data says Yousuf A. Gaffar offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Yousuf A. Gaffar?
- (410) 964-2218, as listed in official Medicare / NPI Registry data.
- What is Yousuf A. Gaffar's NPI number?
- 1891798914. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Yousuf A. Gaffar works
Medicare's Facility Affiliation Data lists Yousuf A. Gaffar at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- AdventHealth AvistaLouisville, CO · Acute Care Hospital · CCN 060103
- AdventHealth Castle RockCastle Rock, CO · Acute Care Hospital · CCN 060125
- AdventHealth LittletonLittleton, CO · Acute Care Hospital · CCN 060113
- AdventHealth ParkerParker, CO · Acute Care Hospital · CCN 060114
- AdventHealth PorterDenver, CO · Acute Care Hospital · CCN 060064
Practice locations
Addresses where Yousuf A. Gaffar is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 8; the Medicare profile lists all.
- 10710 Charter Dr, Suite G020Columbia, MD 21044 (410) 964‑2218
- 2525 S Downing StDenver, CO 80210
- 2535 D S Downing St, Suite 460Denver, CO 80210 (303) 744‑1065
- 2535 S Downing StDenver, CO 80210 (303) 778‑5797
- 2555 S Downing St, 240 Aah Cypress DenverDenver, CO 80210 (303) 715‑7030
Group practices
Medicare enrollment lists Yousuf A. Gaffar as a member of these groups (CMS data updated 2026-10-02).
- Portercare Adventist Health System774 clinicians in the group
- Maryland Oncology Hematology PA104 clinicians in the group
Specialties
- Hematology/Oncologyprimary
- Internal Medicinealso
Other hematologist-oncologists in Columbia
Clinicians with the same Medicare primary specialty in Columbia, MD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1998 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1891798914 |
| 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 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- 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