Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Mary T Delang, M.D.
Pediatrics Physician in Olean, NY · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1861449803
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Registry record
Entity type Individual (Type 1)
Name Dr. Mary T Delang
Credential M.D.
Sex Female
Practice address 135 N Union St, Olean, NY, 14760
Phone (716) 375-7500
Fax (716) 701-6854
Enumeration date May 27, 2006
Last updated in NPPES Feb 28, 2018
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 |
|---|---|---|---|
| 01272802 | Medicaid | NY | - |
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
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Mary Delang?
Mary Delang is registered in NPPES with the primary taxonomy of Pediatrics Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → Henry Storch Cardiovascular Disease Physician · Olean, NY NPI 1538168778 Annmarie Zimmermann Family Medicine Physician · Olean, NY NPI 1578535258 Cindy Mack Advanced Practice Midwife · Olean, NY NPI 1447223946 Southern Tier Community Health Center Network, Inc. Federally Qualified Health Center (FQHC) · Olean, NY NPI 1184654477 Julie Elsigan Medical Physician Assistant · Olean, NY NPI 1154335834 Christina Roosa Family Medicine Physician · Olean, NY NPI 1033304803 Katie Sekulovski Advanced Practice Midwife · Olean, NY NPI 1801082110 Jennifer Mark Obstetrics & Gynecology Physician · Olean, NY NPI 1376706713
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-02-28.