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

Dr. Warren Morse Allen, MD

Individual provider Cytopathology Physician · NPI 1801850722

Dr. Warren Morse Allen, MD is a Pathology in Santa Monica, California. Graduated from University of California, Geffen School of Medicine in 1978, 48 years ago. Practices with Pathology Medical Group of Saint Johns, a 7-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
48
Trained at
University of California, Geffen School of Medicine
Licensed in
CA
In the registry since
2006
Specialties on file
2
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

1328 22nd St
Santa Monica, CA 90404-2032
Phone: (310) 829-8101
Fax: (310) 829-6509
Show map & directions

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

Specialties & licences

Cytopathology Physician (primary) Taxonomy 207ZC0500X · Licence G39548 (CA)
Anatomic Pathology & Clinical Pathology Physician Taxonomy 207ZP0102X · Licence G39548 (CA)

Record details

NPI number1801850722
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 17, 2006
Last updated in NPPESSeptember 11, 2025

Medicare enrollment

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

Medicare specialtyPATHOLOGY
Medical schoolUNIVERSITY OF CALIFORNIA, GEFFEN SCHOOL OF MEDICINE
Graduated 1978 (48 years in practice)
Group practice Pathology Medical Group Of Saint Johns — 7 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount