What is Michael Greenfield's background?

Dr. Greenfield graduated from Harvard Medical School in 1974 and has over 52 years in internal medicine. Dr. Greenfield operates an independent practice.

Does Michael Greenfield take Medicare?

Dr. Greenfield has a Medicare provider ID. Contact the office to confirm enrollment and other coverage.

How do I reach Michael Greenfield's office?

2500 Hospital Dr, Building 14, Mountain View, CA 94040. Phone: (650) 965-7500. Virtual visits are also available for patients who prefer remote care.

How does a virtual visit with Dr. Greenfield work?

Dr. Greenfield's office sends a secure video link before your appointment. You can join from any device with a camera — phone, tablet, or laptop. Most visits take 15–30 minutes. See the telehealth section above for what to prepare.

Michael S. Greenfield, M.D.

Endocrinology, Diabetes & Metabolism

Internal Medicine

(650) 965-7500Mountain View, CA

Telehealth Available

NPI Active per CMS — Q2 2026

Telehealth Available NPI Active per CMS — Q2 2026

With over 52 years in internal medicine, Michael Greenfield, M.D. is a long-established endocrinology, diabetes & metabolism specialist in Mountain View. A Harvard Medical School graduate since 1974, he brings 52+ years of experience. Endocrinologists treat hormonal and metabolic disorders including diabetes (type 1 and 2), thyroid disease, osteoporosis, and more.

1 of 524 Internal Medicine providers in CASee all Internal Medicine in Mountain View|52+ years experience|NPI since 2007

Data updated 2007-07-08 on CMS NPPES

Contact & Location

Practice Location

2500 Hospital Dr Building 14, Mountain View, CA 94040-4106

(650) 965-7500

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Background & Specialty

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

Internal Medicine Endocrinology, Diabetes & Metabolism in Mountain ViewAllopathic & Osteopathic Physicians

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

Harvard Medical School (Class of 1974)

Virtual Endocrinology, Diabetes & Metabolism Care With Michael Greenfield

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

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

Frequently Asked Questions

Common questions about Michael Greenfield

NPI records show Dr. Greenfield as active with telehealth listed in Mountain View, CA. Note: NPI status alone doesn't confirm open availability — always call ahead. Phone: (650) 965-7500.

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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.

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