William Ang Go, M.D.

Gastroenterology Internal Medicine

William Ang Go is a Gastroenterology Internal Medicine specialist based in Lancaster, CA with over 35 years of clinical experience. Offers virtual telehealth visits.

(661) 726-2226Lancaster, CA
Telehealth Available
NPI Active per CMS — Q2 2026

With over 35 years in internal medicine, William Ang Go, M.D. is a long-established gastroenterologist in Lancaster. He has been in practice for 35+ years. Gastroenterologists diagnose and treat digestive system disorders including GERD, irritable bowel syndrome (IBS), and more.

At a glance

  • Uses generic medications more than 29% of reporting doctors in California
  • Virtual visits available — no app or travel required
1 of 847 Internal Medicine providers in CASee all Internal Medicine in Lancaster35+ years experienceNPI since 2008

Older · 1644dNPPES updated 2021-11-22 · verify NPI on CMS · Verify license at Medical Board of California

Contact & Location

Practice Location

43112 15th St W, Lancaster, CA 93534-6219

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Background & Specialty

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

Career Journey
  1. 35 years in practice

    Senior practitioner

Internal MedicineAllopathic & Osteopathic Physicians

Gastroenterologists diagnose and treat digestive system disorders including GERD, irritable bowel syndrome (IBS), inflammatory bowel disease (Crohn's, ulcerative colitis), liver disease, pancreatitis, and colon polyps. They perform endoscopies and colonoscopies.

Taxonomy: 207RG0100X

Virtual Internal Medicine Care With William Ang Go

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

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

Frequently Asked Questions

Common questions about William Ang Go

Dr. Go is listed as active in the NPI registry with telehealth listed in Lancaster, CA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (661) 726-2226.

Verified across 3 federal data sources

Sourced from CMS NPPES · OIG LEIE · CMS Medicare Part D. See Data Methodology.

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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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