Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Nathan Shumway, D.O., FACP

Hematology & Oncology Physician in San Antonio, TX · enumerated 2005.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1285616359

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Registry record

Entity type Individual (Type 1)

Name Dr. Nathan Shumway

Credential D.O., FACP

Sex Male

Practice address 18707 Hardy Oak Blvd, Suite 320, San Antonio, TX, 78258

Phone (210) 545-6972

Fax (210) 545-1016

Enumeration date Nov 15, 2005

Last updated in NPPES Jan 28, 2016

Taxonomy & licenses

207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians · License DOS-1014 (HI) Secondary

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License P2528 (TX) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
P01547652	Other	TX	RAILROAD MEDICARE
349764601	Medicaid	TX	-

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.

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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 Nathan Shumway?

Nathan Shumway is registered in NPPES with the primary taxonomy of Hematology & Oncology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-01-28.