Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. William E Omalley, M.D.
Specialist in Rochester, NY · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1558327999
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Registry record
Entity type Individual (Type 1)
Name Dr. William E Omalley
Credential M.D.
Sex Male
Practice address 1000 South Ave, Box 20, Rochester, NY, 14620
Phone (585) 341-0366
Fax (585) 371-0681
Enumeration date Apr 25, 2006
Last updated in NPPES Nov 1, 2016
Taxonomy & licenses
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 01713675 | Medicaid | NY | - |
| P010199116 | Other | NY | BLUE CHOICE |
| 00020275401 | Other | NY | UNIVERA |
| 0101630 | Other | NY | GHI |
| 020035954 | Other | NY | RAILROAD MEDICARE |
| 601716 | Other | NY | MVP |
| 101584FL | Other | NY | PREFERRED CARE |
| 3944 | Other | NY | BLUE SHIELD |
| 000525379001 | Other | NY | BS WESTERN/COMMUNITY BLUE |
| 5003449 | Other | NY | AETNA |
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
Where does William Omalley practice?
The practice location on file with NPPES is in Rochester, NY. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for William Omalley?
The National Provider Identifier (NPI) for William Omalley is 1558327999, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-11-01.