Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Martha Elizabeth Billings, M.D.

Sleep Medicine (Internal Medicine) Physician in Seattle, WA · enumerated 2006.

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

National Provider Identifier

1700811619

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Registry record

Entity type Individual (Type 1)

Name Martha Elizabeth Billings

Credential M.D.

Sex Female

Practice address 908 Jefferson St, Suite 400, Seattle, WA, 98104

Phone (206) 744-4999

Enumeration date Jul 11, 2006

Last updated in NPPES Jan 16, 2014

Taxonomy & licenses

207RS0012X Sleep Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License WA MD00046402 (WA) Primary

207RP1001X Pulmonary Disease Physician Allopathic & Osteopathic Physicians · License WA MD00046402 (WA) Secondary

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
0298525	Other	WA	L&I
1700811619	Medicaid	WA	-

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1700811619 active?

Yes, as of the latest NPPES snapshot, NPI 1700811619 is active (record last updated 2014-01-16).

How do I verify Martha Billings's NPI record?

Cross-check NPI 1700811619 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-01-16.