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Dr. Zeferino Arroyo, D.O.

Anesthesiology Physician in Billings, MT · enumerated 2006.

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

National Provider Identifier

1285601096

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Registry record

Entity type Individual (Type 1)
Name Dr. Zeferino Arroyo
Credential D.O.
Sex Male
Practice address 1233 N 30th St, Billings, MT, 59101
Phone (406) 254-0707
Fax (406) 254-0709
Enumeration date Mar 1, 2006
Last updated in NPPES Jul 8, 2010

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 10380 (MT) 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

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

What is the NPI number for Zeferino Arroyo?
The National Provider Identifier (NPI) for Zeferino Arroyo is 1285601096, a Type 1 (individual) record in the CMS NPPES registry.
Where does Zeferino Arroyo practice?
The practice location on file with NPPES is in Billings, MT. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-07-08.