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DR. KAREN LOUISE HERBST PH.D., M.D.
NPI 1114977840
Internal Medicine - Endocrinology, Diabetes & Metabolism in Tucson, AZ

Active since May 11, 2006Opted out of Medicare · through Mar 21, 2028
6365 E TANQUE VERDE RD STE 200, TUCSON, AZ 85715(520) 719-1610(520) 720-3904 Get Directions Write a Review

NPPES record last updated: August 25, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Sep 17, 2024, Dec 29, 2022, Sep 24, 2021 and 1 more (4 updates tracked since 2020).

About Dr. Karen Louise Herbst Ph.d., M.d. NPPES

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

DR. KAREN LOUISE HERBST PH.D., M.D. (NPI 1114977840) is an individual endocrinology, diabetes & metabolism provider in Tucson, Arizona, licensed in California (A80165) and active in the NPI registry since May 2006. She has opted out of Medicare through March 21, 2028.

NPPES Registry Identity

NPI1114977840
Entity TypeIndividualFemale
Primary Taxonomy207RE0101X
Provider Legal NameDR. KAREN LOUISE HERBSTCredential: PH.D., M.D.
Location Address6365 E TANQUE VERDE RD STE 200Tucson, AZ 85715-3830
Mailing Address6365 E Tanque Verde Rd Ste 200Tucson, AZ 85715-3830 · (520) 719-1610 · Fax (520) 720-3904
Phone(520) 719-1610
Fax(520) 720-3904
Sole ProprietorNo
Enumeration DateMay 11, 2006
Last NPPES UpdateAugust 25, 20254 updates tracked since enumeration
NPPES CertifiedAugust 25, 2025
✔ NPI 1114977840 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians
Taxonomy Code207RE0101X
Licenses✔ Licensed in CA · A80165✔ Licensed in AZ · 47835
Definition
An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.
6365 E TANQUE VERDE RD STE 200, Tucson, AZ 85715
Open in Google Maps ↗

Other Identifiers 1

Other1114977840AZ · Npi

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Dr. Karen Louise Herbst Ph.d., M.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 March 21, 2022 through March 21, 2028.

Opt-Out Effective DateMarch 21, 2022
Opt-Out In Effect ThroughMarch 21, 2028Opt-out affidavits renew automatically every two years unless cancelled

Other Providers at the Same Location NPPES

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

JULES PLACE, LLC
Internal Medicine (Endocrinology, Diabetes & Metabolism)
6365 E TANQUE VERDE RD STE 200
TUCSON, AZ 85715
Pima County (520) 719-1610

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 Karen Herbst's NPI number?

The NPI number for Karen Herbst is 1114977840. It was assigned to this individual provider in the NPPES registry on May 11, 2006.

Where is Karen Herbst located?

Karen Herbst practices at 6365 E Tanque Verde Rd Ste 200, Tucson, AZ 85715. The listed phone number is (520) 719-1610.

What is Karen Herbst's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Is Karen Herbst enrolled in Medicare?

No. Karen Herbst has opted out of Medicare through March 21, 2028. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out.

When was this NPI record last updated?

The NPPES record for Karen Herbst was last updated on August 25, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months 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.