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

William S. Longfellow, MD, Inc

Organization Internal Medicine Physician · NPI 1922149020

William S. Longfellow, MD, Inc 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?
Inc — Incorporated
A form of business registration, not a clinical qualification.

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Practice location Address checks out

71780 San Jacinto Dr Bldg 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 number1922149020
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official William Longfellow — President · (760) 340-6777
NPI enumeratedFebruary 9, 2007
Last updated in NPPESJune 22, 2010
Mailing address71780 San Jacinto Dr, Bldg. H-1, Rancho Mirage, CA 92270-5516

Other providers in Rancho Mirage