Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Mark K Gorbahn, DC

Individual provider Chiropractor · NPI 1619992815

Dr. Mark K Gorbahn, DC is registered under Chiropractic in Atascadero, California. Graduated from Palmer College Chiropractic - West Sunnyvale in 1990, 36 years ago. Practices with David B. Hammer, a 116-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
36
Trained at
Palmer College Chiropractic - West Sunnyvale
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

9455 El Camino Real
Atascadero, CA 93422-5513
Phone: (805) 466-5200
Fax: (805) 462-2489
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Chiropractor (primary) Taxonomy 111N00000X · Licence DC21193 (CA)

Record details

NPI number1619992815
Entity typeIndividual (Type 1)
GenderMale
Credentials DC
Sole proprietorYes
NPI enumeratedJuly 12, 2006
Last updated in NPPESAugust 1, 2022
Certification dateAugust 1, 2022

Medicare enrollment

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

Medicare specialtyCHIROPRACTIC
Medical schoolPALMER COLLEGE CHIROPRACTIC - WEST SUNNYVALE
Graduated 1990 (36 years in practice)
Group practice David B. Hammer — 116 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients78
Services billed 680 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Colleagues at David B. Hammer

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 116 clinicians in the practice; 12 are shown here.

Other providers in Atascadero