Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark A Rainosek, M.D.

Anesthesiology Physician in Anchorage, AK · enumerated 2006.

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

National Provider Identifier

1255303053

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark A Rainosek

Credential M.D.

Sex Male

Practice address 1200 Airport Heights Dr, Suite 355, Anchorage, AK, 99508

Phone (907) 258-2149

Fax (907) 258-2147

Enumeration date Feb 6, 2006

Last updated in NPPES Oct 10, 2024

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 17057 (SC) Secondary

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 94-125 (NM) Secondary

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 7873 (ND) Secondary

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 0101053991 (VA) Secondary

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License E-1569 (AR) Secondary

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License MD114245 (MO) Secondary

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 217875 (NY) Secondary

207LP2900X Pain Medicine (Anesthesiology) Physician Allopathic & Osteopathic Physicians · License 94-125 (NM) Secondary

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 4089 (AK) Primary

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
MD40891	Medicaid	AK	-

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 Mark Rainosek?

Mark Rainosek is registered in NPPES with the primary taxonomy of Anesthesiology 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 2024-10-10.