Charles A Longo, M.D.

Endocrinology, Diabetes & Metabolism

Internal Medicine

(605) 322-7600Sioux Falls, SD
Telehealth Available
NPI Active per CMS — Q2 2026

With over 28 years in internal medicine, Charles Longo, M.D. is a long-established endocrinology, diabetes & metabolism specialist in Sioux Falls. Trained at University of Iowa, Rj & L Carver College of Medicine (class of 1998), he has been practicing for over 28 years. Endocrinologists treat hormonal and metabolic disorders including diabetes (type 1 and 2), thyroid disease, osteoporosis, and more.

1 of 12 Internal Medicine providers in SDSee all Internal Medicine in Sioux Falls28+ years experienceNPI since 2006

Data updated 2013-12-13 on CMS NPPES

Contact & Location

Practice Location

1315 S. Cliff Ave Ste 3000, Sioux Falls, SD 57105-1061

Fax: (605) 322-7601

Patient Reviews

No patient reviews yet. If you've seen Charles Longo, your feedback helps other patients.

Review PolicyAll feedback is moderated before publishing. We verify reviewer identity where possible and enforce a one-review-per-provider policy. Full guidelines →

Background & Specialty

Education, training, and specialty classification from CMS NPPES and Medicare records.

Endocrinologists treat hormonal and metabolic disorders including diabetes (type 1 and 2), thyroid disease, osteoporosis, adrenal disorders, pituitary conditions, and polycystic ovary syndrome (PCOS).

Taxonomy: 207RE0101X

Education & Training

University of Iowa, Rj & L Carver College of Medicine (Class of 1998)

Virtual Endocrinology, Diabetes & Metabolism Care With Charles Longo

NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.

Schedule a virtual visit with Charles Longo for follow-ups, medication reviews, and ongoing care — no travel to Sioux Falls required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes.

Frequently Asked Questions

Common questions about Charles Longo

NPI records show Dr. Longo as active with telehealth listed in Sioux Falls, SD. Note: NPI status alone doesn't confirm open availability — always call ahead. Phone: (605) 322-7600.

Is this your profile?

Verify credentials, update practice details, and manage telehealth.

Claim Profile

Medical Disclaimer: NPI Telehealth is a provider directory for informational purposes only. This page does not constitute medical advice, diagnosis, or treatment recommendations. Provider data is sourced from the CMS NPPES federal registry and public Medicare datasets. NPI Telehealth does not verify clinical qualifications beyond federal records. Data may not reflect real-time availability — always contact the provider's office directly to confirm details before seeking care.

Related Providers

Endocrinology, Diabetes & Metabolism in SD

See all