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

Jethro Trees Ritter, DO

Individual provider Infectious Disease Physician · NPI 1457330797

Jethro Trees Ritter, DO is registered under Infectious Disease in San Luis Obispo, California. Qualified in 2001, 25 years ago. Practices with J Trees Ritter, DO, Inc, a 3-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
25
Licensed in
CA
In the registry since
2006
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

1551 Bishop St Ste 250
San Luis Obispo, CA 93401-4661
Phone: (805) 540-0689
Fax: (805) 541-4376
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Infectious Disease Physician (primary) Taxonomy 207RI0200X · Licence 20A8407 (CA)

Record details

NPI number1457330797
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJanuary 13, 2006
Last updated in NPPESMay 12, 2023
Certification dateMay 12, 2023

Medicare enrollment

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

Medicare specialtyINFECTIOUS DISEASE
Medical schoolOTHER
Graduated 2001 (25 years in practice)
Group practice J Trees Ritter, Do, Inc — 3 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients302
Services billed 1,436 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Ronald Reagan Ucla Medical Center Hospital · Los Angeles, CA
  • Central Coast Home Health Inc Home health agency · San Luis Obispo, CA · listed as Central Coast Home Health, Inc
  • Adventist Health Sierra Vista Hospital · San Luis Obispo, CA
  • Adventist Health Twin Cities Hospital · Templeton, CA
  • French Hospital Medical Center Hospital · San Luis Obispo, CA
  • Marian Regional Medical Center Hospital · Santa Maria, CA

Colleagues at J Trees Ritter, DO, Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 3 clinicians in the practice; 1 are shown here.

Other providers in San Luis Obispo