What is Sienna Gregan's NPI number?

Sienna Gregan's National Provider Identifier (NPI) is 1639648520, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Sienna Gregan's specialty?

Sienna Gregan is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).

Where is Sienna Gregan located?

Sienna Gregan's practice location on file with NPPES is 2501 Harrison St, Oakland, CA 94612-3811.

What is Sienna Gregan's phone number?

The practice phone number listed in the NPPES registry for Sienna Gregan is (415) 870-6968.

Is Sienna Gregan's NPI active?

Yes — Sienna Gregan's NPI (1639648520) is active in the NPPES registry as of the last update on 2018-11-20.

IndividualActive

Sienna Gregan, AMFT

NPI 1639648520 · Mental Health Counselor · Oakland, CA

Sienna Gregan, AMFT is a Mental Health Counselor provider in Oakland, CA (NPI 1639648520).

Provider details

NPI number: 1639648520
Entity type: Individual
Primary specialty: Mental Health CounselorBehavioral Health & Social Service Providers
Credential: AMFT
Sex: Female
Sole proprietor: No
License: 103588 (CA)

Specialties & taxonomies

Mental Health CounselorPrimary101YM0800XLicense 103588 (CA)
Behavioral Health & Social Service Providers

Profile Score

Established profile(67/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
7 yrs in NPPES registry
Profile completeness38% of score
100% of core fields populated
Practice footprint23% of score
1 documented practice location

Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

Practice location

2501 Harrison St

Oakland, CA 94612-3811

Phone: (415) 870-6968

Street-level locationGet directions

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Mailing address