Active NPI
William Fitzgerald Demas, M.D., F.A.C.R.
- Radiation Oncology Physician
- Akron, OH
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Radiation Oncology Physician
- License
- 35-054294
- Practice address
- 525 E Market St
Akron, OH 44304-1619 - Phone
- (330) 375-3557
- Fax
- (337) 376-1302
- NPI assigned
- Nov 4, 2005
- Last updated
- Dec 2, 2025
- Sex
- Male
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Radiation Oncology Physician | 2085R0001X | 35-054294 | OH | Primary |
Addresses
Primary practice location
525 E Market St
Akron, OH 44304-1619
Mailing address
75 Arch St Ste 410
Akron, OH 44304-1433
Phone (330) 376-0928
Other practice location 1
524 W High St
Bryan, OH 43506-1618
Phone (419) 636-9800
Electronic endpoints 3
| Type | Endpoint | Use | Affiliation |
|---|---|---|---|
| FHIR URL | https://epicprod-mobile.parkview.com/FHIR/api/FHIR/R4/ | ||
| Direct Messaging Address | wdemas688586@Direct.Parkviewexchange.com | ||
| FHIR URL | https://epicprod-mobile.parkview.com/FHIR/api/FHIR/DSTU2/ |
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in OH, NY
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: Yes
Enrollment records 2
Care Compare profile
Medicare Care Compare- Specialty
- Radiation Oncology
- Education
- State University of New York Downstate Medical Center, 1981
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Group practices
Practice addresses (Care Compare)
158 W Main Rd
Conneaut, OH 44030-2039
442 W High St
Bryan, OH 43506-1681
Phone (260) 266-8210
Hospital & facility affiliations
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 35-054294 | OH | MD | Radiation Oncology Physician |
Practice roles
Locations
234 Eugenio Maria de Hosto Blvd
Bronx, NY 10451
Phone (718) 579-5874
2601 Ocean Pkwy
Brooklyn, NY 11235
Phone (718) 616-5354
451 Clarkson Ave
#R
Brooklyn, NY 11203
Phone (718) 245-2306
7901 Broadway
Rm A119
Elmhurst, NY 11373
Phone (718) 334-4951
7901 Broadway
Flushing, NY 11373
Phone (718) 334-2156
506 Malcolm X Blvd
New York, NY 10037
Phone (212) 939-1000
1415 Buffalo St
Olean, NY 14760
Phone (716) 373-7134
442 W High St
Bryan, OH 43506
Phone (260) 266-8210
524 W High St
Bryan, OH 43506
Phone (419) 636-9800
158 W Main Rd
Ste 203
Conneaut, OH 44030
Phone (440) 285-2960
Networks
- Healthfirst Medicare Network H5989
- Healthfirst Medicare Network H1722
- Healthfirst Medicare Network H9678
- Healthfirst Medicare Network H3359
Interoperability endpoints
- wdemas3599853@nychhc.direct-ci.com
- wdemas36883@ehrdirect.uhhospitals.org
- wdemas688586@direct.parkviewexchange.com
- williamdemas@uhhs.allscriptsdirect.net
Organizations & group practices 19
Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.
-
- Family Medicine Physician
- Bryan, OH
- NPI 1619915170
-
- Gastroenterology Physician
- Mentor, OH
- NPI 1003935339
-
dba Mount Sinai Elmhurst Faculty practice Group
- Orthopaedic Surgery Physician
- Elmhurst, NY
- NPI 1609120674
-
- Registered Dietitian
- New York, NY
- NPI 1013375526
-
- Surgery Physician
- Lima, OH
- NPI 1518589803
-
- Emergency Medical Services (Emergency Medicine) Physician
- Bronx, NY
- NPI 1689618407
-
- Durable Medical Equipment & Medical Supplies
- Bryan, OH
- NPI 1942770581
-
dba Uhmp
- Internal Medicine Physician
- Shaker Heights, OH
- NPI 1720220098
-
dba Center for Orthopedics
- Orthopaedic Surgery Physician
- Oberlin, OH
- NPI 1982727087
-
dba Mount Sinai Elmhurst Faculty Practice Group
- Surgery Physician
- Elmhurst, NY
- NPI 1073867040
-
dba Mount Sinai Elmhurst Faculty Practice Group
- Diagnostic Radiology Physician
- Elmhurst, NY
- NPI 1619221686
Radiation Oncology
Hospital & facility affiliations 3
Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.
-
- General Acute Care Hospital
- Bryan, OH
- NPI 1962458521
-
dba Salem Regional Medical Center
- General Acute Care Hospital
- Salem, OH
- NPI 1639131535
-
dba SRMC Ancillary Services
- Radiology Clinic/Center
- Calcutta, OH
- NPI 1750227377
Hospital
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1131062400000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1764633600000",
"number": "1033100334",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "75 ARCH ST STE 410",
"city": "AKRON",
"state": "OH",
"postal_code": "443041433",
"telephone_number": "330-376-0928",
"fax_number": "330-376-1302"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "525 E MARKET ST",
"city": "AKRON",
"state": "OH",
"postal_code": "443041619",
"telephone_number": "330-375-3557",
"fax_number": "337-376-1302"
}
],
"practiceLocations": [
{
"address_1": "524 W High St",
"address_purpose": "LOCATION",
"city": "Bryan",
"state": "OH",
"postal_code": "435061618",
"country_code": "US",
"telephone_number": "419-636-9800",
"fax_number": "419-636-0451",
"country_name": "United States",
"address_type": "DOM"
}
],
"basic": {
"last_name": "DEMAS",
"first_name": "WILLIAM",
"middle_name": "FITZGERALD",
"credential": "M.D., F.A.C.R.",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2005-11-04",
"last_updated": "2025-12-02",
"certification_date": "2025-12-02",
"status": "A"
},
"taxonomies": [
{
"code": "2085R0001X",
"taxonomy_group": "",
"desc": "Radiology, Radiation Oncology",
"state": "OH",
"license": "35-054294",
"primary": true
}
],
"identifiers": [],
"endpoints": [
{
"endpointType": "FHIR",
"endpointTypeDescription": "FHIR URL",
"endpoint": "https://epicprod-mobile.parkview.com/FHIR/api/FHIR/R4/",
"affiliation": "N",
"address_1": "524 W High St",
"city": "Bryan",
"state": "OH",
"country_code": "US",
"postal_code": "435061618",
"country_name": "United States",
"address_type": "DOM"
},
{
"endpointType": "DIRECT",
"endpointTypeDescription": "Direct Messaging Address",
"endpoint": "wdemas688586@Direct.Parkviewexchange.com",
"affiliation": "N",
"address_1": "524 W High St",
"city": "Bryan",
"state": "OH",
"country_code": "US",
"postal_code": "435061618",
"country_name": "United States",
"address_type": "DOM"
},
{
"endpointType": "FHIR",
"endpointTypeDescription": "FHIR URL",
"endpoint": "https://epicprod-mobile.parkview.com/FHIR/api/FHIR/DSTU2/",
"affiliation": "N",
"address_1": "524 W High St",
"city": "Bryan",
"state": "OH",
"country_code": "US",
"postal_code": "435061618",
"country_name": "United States",
"address_type": "DOM"
}
],
"other_names": []
}Other providers in Akron, OH
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 2, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
- Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.