Quick answers
- Which hospitals does Frederick Ast work at?
- Medicare's official clinician data lists Frederick Ast at 5 hospitals: Cox Medical Centers, Insight Hospital and Medical Center Coldwater, Northern Light Eastern Maine Medical Center, Opelousas General Health System and Tri-State Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Frederick Ast see patients?
- Medicare's clinician data lists 3 practice locations, including Bronx, NY, Coldwater, MI and Benson, AZ. Call before your visit to confirm the address.
- What is Frederick Ast's specialty?
- Medicare lists Allergy/Immunology as the primary specialty, and also Internal Medicine and Rheumatology.
- Does Frederick Ast accept Medicare assignment?
- Yes. Medicare's clinician data says Frederick Ast 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.
- What is the phone number for Frederick Ast?
- (646) 350-1633, as listed in official Medicare / NPI Registry data.
- What is Frederick Ast's NPI number?
- 1699742288. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Frederick Ast works
Medicare's Facility Affiliation Data lists Frederick Ast at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Cox Medical CentersSpringfield, MO · Acute Care Hospital · CCN 260040
- Insight Hospital and Medical Center ColdwaterColdwater, MI · Acute Care Hospital · CCN 230022
- Northern Light Eastern Maine Medical CenterBangor, ME · Acute Care Hospital · CCN 200033
- Opelousas General Health SystemOpelousas, LA · Acute Care Hospital · CCN 190017
- Tri-State Memorial HospitalClarkston, WA · Critical Access Hospital · CCN 501332
Practice locations
Addresses where Frederick Ast is enrolled with Medicare (CMS data updated 2026-10-02).
- 1250 Shakespeare AveBronx, NY 10452 (646) 350‑1633
- 274 E Chicago StColdwater, MI 49036 (517) 279‑5400
- 450 S Ocotillo AveBenson, AZ 85602 (520) 586‑2261
Group practices
Medicare enrollment lists Frederick Ast as a member of these groups (CMS data updated 2026-10-02).
- Shakespeare Operating LLC151 clinicians in the group
- Community Health Center of Branch County56 clinicians in the group
- Benson Hospital Corporation21 clinicians in the group
Specialties
- Allergy/Immunologyprimary
- Internal Medicinealso
- Rheumatologyalso
Other allergist and immunologists in Bronx
Clinicians with the same Medicare primary specialty in Bronx, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1987 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1699742288 |
| 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