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OAK MEDICAL SC
NPI 1669910345
Internal Medicine in Waukesha, WI

Active since February 02, 2017
N20W22961 WATERTOWN RD, WAUKESHA, WI 53186(262) 875-5070(866) 384-9486 Get Directions Write a Review

NPPES record last updated: June 2, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jun 2, 2026, Jun 14, 2021, Feb 2, 2017 (3 updates tracked since 2017).

About Oak Medical Sc NPPES

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

OAK MEDICAL SC (NPI 1669910345) is a healthcare organization registered as an internal medicine in Waukesha, Wisconsin and active in the NPI registry since February 2017. The organization lists Mahtab Sidhu, Medical Director, as its authorized official.

NPPES Registry Identity

NPI1669910345
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameOAK MEDICAL SC
Location AddressN20W22961 WATERTOWN RDWaukesha, WI 53186-1308
Mailing AddressN20w22961 Watertown RdWaukesha, WI 53186-1308 · (262) 875-5070 · Fax (866) 384-9486
Phone(262) 875-5070
Fax(866) 384-9486
Organization SubpartNo
Authorized OfficialMahtab SidhuMedical Director · (262) 875-5070
Enumeration DateFebruary 2, 2017
Last NPPES UpdateJune 2, 20263 updates tracked since enumeration
NPPES CertifiedJune 2, 2026
✔ NPI 1669910345 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedPhysical Medicine & RehabilitationTaxonomy 208100000X
Also ListedNurse Practitioner · Psychiatric/Mental HealthTaxonomy 363LP0808X
N20W22961 WATERTOWN RD, Waukesha, WI 53186
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Group Practice 2

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP
Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Aspirus Health Plan, Quartz and more.Insurance ›

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.

KATELYN RYMAN NP
Nurse Practitioner
N20W22961 WATERTOWN RD
WAUKESHA, WI 53186
Waukesha County (262) 875-5070
SARA M PETERS PMHNP-BC
Nurse Practitioner (Psychiatric/Mental Health)
N20W22961 WATERTOWN RD
WAUKESHA, WI 53186
Waukesha County (262) 875-4521
CHRISTINE ANN MALECHEK NP
Nurse Practitioner (Gerontology)
N20W22961 WATERTOWN RD
WAUKESHA, WI 53186
Waukesha County (262) 875-4521
SARAH MCBRIDE AG-CNS
Nurse Practitioner
N20W22961 WATERTOWN RD
WAUKESHA, WI 53186
Waukesha County (262) 875-5070
KATIE CRAWFORD APNP
Nurse Practitioner (Family)
N20W22961 WATERTOWN RD
WAUKESHA, WI 53186
Waukesha County (262) 875-5070
REBECCA JOY BLAND APNP
Nurse Practitioner (Acute Care)
N20W22961 WATERTOWN RD
WAUKESHA, WI 53186
Waukesha County (262) 875-4521
SOPHIA SMITH NP
Nurse Practitioner (Family)
N20W22961 WATERTOWN RD
WAUKESHA, WI 53186
Waukesha County (262) 875-5070
AMANDA LEE BONK APRN
Nurse Practitioner (Gerontology)
N20W22961 WATERTOWN RD
WAUKESHA, WI 53186
Waukesha County (262) 290-5990

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 Oak Medical Sc's NPI number?

The NPI number for Oak Medical Sc is 1669910345. It was assigned to this organization in the NPPES registry on February 2, 2017.

Where is Oak Medical Sc located?

Oak Medical Sc is located at N20w22961 Watertown Rd, Waukesha, WI 53186. The listed phone number is (262) 875-5070.

What is Oak Medical Sc's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

What insurance does Oak Medical Sc accept?

Health plans from Anthem Blue Cross and Blue Shield, Aspirus Health Plan, Quartz and Security Health Plan list Oak Medical Sc as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Oak Medical Sc was last updated on June 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.