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

Dr. Jack R Siekerka, DC

Individual provider Chiropractor · NPI 1598848566

Dr. Jack R Siekerka, DC is a Chiropractic in El Cajon, California. Graduated from Los Angeles College of Chiropractic in 1990, 36 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in California.

Years since qualifying
36
Trained at
Los Angeles College of Chiropractic
Licensed in
CA
In the registry since
2006
What do these letters mean?
DC — Doctor of Chiropractic
A licensed chiropractor.

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Practice location Address checks out

983 E Washington Ave
El Cajon, CA 92020-6611
Phone: (619) 447-3779
Fax: (619) 447-3899
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Chiropractor (primary) Taxonomy 111N00000X · Licence 21509 (CA)

Record details

NPI number1598848566
Entity typeIndividual (Type 1)
GenderMale
Credentials DC
Sole proprietorYes
NPI enumeratedOctober 23, 2006
Last updated in NPPESAugust 20, 2010
Mailing address983 E Washington Ave, El Cajon, CA 92020-6611

Medicare enrollment

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

Medicare specialtyCHIROPRACTIC
Medical schoolLOS ANGELES COLLEGE OF CHIROPRACTIC
Graduated 1990 (36 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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