Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Carol P. Thomason, CNM

Advanced Practice Midwife in San Francisco, CA · enumerated 2006.

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

National Provider Identifier

1861413361

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Registry record

Entity type Individual (Type 1)

Name Carol P. Thomason

Credential CNM

Sex Female

Practice address 400 Parnassus Ave, San Francisco, CA, 94143

Phone (415) 476-1000

Enumeration date Jul 21, 2006

Last updated in NPPES Jul 21, 2022

Taxonomy & licenses

367A00000X Advanced Practice Midwife Physician Assistants & Advanced Practice Nursing Providers · License APRN-914 (HI) Secondary

367A00000X Advanced Practice Midwife Physician Assistants & Advanced Practice Nursing Providers · License 224 (CA) Primary

CNM · Certified Nurse Midwife: An advanced practice nurse specializing in pregnancy, childbirth, and reproductive care. About the CNM credential

Other identifiers

Identifier	Type	State	Issuer
0000261156	Other	HI	HMSA BILLING NUMBER
58689401	Medicaid	HI	-

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 1861413361 active?

Yes, as of the latest NPPES snapshot, NPI 1861413361 is active (record last updated 2022-07-21).

How do I verify Carol Thomason's NPI record?

Cross-check NPI 1861413361 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 2022-07-21.