Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. William Steven Longfellow, MD

Individual provider Internal Medicine Physician · NPI 1922149285

Dr. William Steven Longfellow, MD is an Internal Medicine Physician in Rancho Mirage, California. Licensed in California. Registered with an NPI since 2007.

Licensed in
CA
In the registry since
2007
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

71780 San Jacinto Dr Ste H-1
Rancho Mirage, CA 92270-5516
Phone: (760) 340-6777
Fax: (760) 340-1146
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A50581 (CA)

Record details

NPI number1922149285
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 9, 2007
Last updated in NPPESOctober 10, 2011

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