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

Marc Randall Shapiro, MD

Individual provider Internal Medicine Physician · NPI 1740217348

Marc Randall Shapiro, MD is an Internal Medicine in Clearlake, California. Qualified in 1976, 50 years ago. Practices with Willits Hospital Inc, a 67-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
50
Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

3400 Emerson St Ste A
Clearlake, CA 95422-9529
Phone: (707) 994-7241
Fax: (707) 994-0870
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 G343590 (CA)

Record details

NPI number1740217348
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJune 27, 2006
Last updated in NPPESAugust 28, 2009
Mailing address3400 Emerson St, Suite A, Clearlake, CA 95422-9529

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1976 (50 years in practice)
Group practice Willits Hospital Inc — 67 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Other providers in Clearlake