1. Home
  2. Directory
  3. California
  4. Berkeley
  5. Psychologist
  6. NPI Profile

ISABELLE EVELYNE STIERLI PH.D.
NPI 1285969899
Psychologist - Adult Development & Aging in Berkeley, CA

Active since October 15, 2009Opted out of Medicare · through Oct 1, 2026
2340 WARD ST, 201, BERKELEY, CA 94705(510) 869-3744 Get Directions Write a Review

NPPES record last updated: October 15, 2009. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Isabelle Evelyne Stierli Ph.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ISABELLE EVELYNE STIERLI PH.D. (NPI 1285969899) is an individual adult development & aging provider in Berkeley, California, licensed in California (PSY14837) and active in the NPI registry since October 2009. She has opted out of Medicare through October 1, 2026 and remains eligible to order and refer.

NPPES Registry Identity

NPI1285969899
Entity TypeIndividualFemale
Primary Taxonomy103TA0700X
Provider Legal NameISABELLE EVELYNE STIERLICredential: PH.D.
Location Address2340 WARD ST, 201Berkeley, CA 94705-1124
Mailing Address2340 Ward Street, 201Berkeley, CA 94705 · (510) 869-3744
Phone(510) 869-3744
Sole ProprietorYes
Enumeration DateOctober 15, 2009
✔ NPI 1285969899 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyPsychologist · Adult Development & AgingBehavioral Health & Social Service Providers
Taxonomy Code103TA0700X
License✔ Licensed in CA · PSY14837
Definition
A psychologist who specializes in geropsychology, which applies the knowledge and methods of psychology to understanding and helping older persons and their families to maintain well-being, overcome problems and achieve maximum potential during later life. Professional geropsychology appreciates the wide diversity among older adults, the complex ethical issues that can arise in geriatric practice and the importance of interdisciplinary models of care.
Also ListedPsychologist · Addiction (Substance Use Disorder)Taxonomy 103TA0400X · License PSY14837 (CA)
Also ListedPsychologist · ClinicalTaxonomy 103TC0700X · License PSY14837 (CA)
2340 WARD ST, Berkeley, CA 94705
Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Isabelle Evelyne Stierli Ph.d. has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from October 1, 2020 through October 1, 2026.

Opt-Out Effective DateOctober 1, 2020
Opt-Out In Effect ThroughOctober 1, 2026Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DEEAHNA MARIE LORENZ PH.D.
Psychologist (Clinical)
2340 WARD ST, SUITE 107
BERKELEY, CA 94705
Alameda County (510) 528-2228
DENNI LIEBOWITZ LCSW
Social Worker (Clinical)
2340 WARD ST, SUITE 202
BERKELEY, CA 94705
Alameda County (510) 549-2945
DR. LUCIA A MILBURN PH.D
Psychologist (Clinical)
2340 WARD ST, SUITE #105
BERKELEY, CA 94705
Alameda County (510) 540-5138
DR. CAROLE ANNE PETIET PHD
Psychologist (Clinical)
2340 WARD ST, SUITE 105
BERKELEY, CA 94705
Alameda County (510) 843-6760
RACHELLE AIELLO LMFT
Marriage & Family Therapist
2340 WARD ST
BERKELEY, CA 94705
Alameda County (510) 560-4492
DR. DENNIS S WEISS M.D.
Psychiatry & Neurology (Psychiatry)
2340 WARD ST, 101
BERKELEY, CA 94705
Alameda County (510) 848-5308
MS. ALEXANDRA M. ELITE LCSW
Social Worker (Clinical)
2340 WARD ST, SUITE 201
BERKELEY, CA 94705
Alameda County (415) 793-3296
MEGAN LEAH MACMILLAN LMFT
Marriage & Family Therapist
2340 WARD ST, SUITE 204
BERKELEY, CA 94705
Alameda County (510) 647-8971

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Isabelle Stierli's NPI number?

The NPI number for Isabelle Stierli is 1285969899. It was assigned to this individual provider in the NPPES registry on October 15, 2009.

Where is Isabelle Stierli located?

Isabelle Stierli practices at 2340 Ward St 201, Berkeley, CA 94705. The listed phone number is (510) 869-3744.

What is Isabelle Stierli's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Adult Development & Aging, with taxonomy code 103TA0700X.

Is Isabelle Stierli enrolled in Medicare?

No. Isabelle Stierli has opted out of Medicare through October 1, 2026. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

When was this NPI record last updated?

The NPPES record for Isabelle Stierli was last updated on October 15, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.