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

Joshua Greenstein, MD

Individual provider Nephrology Physician · NPI 1104881457

Joshua Greenstein, MD is a Nephrology in Escondido, California. Qualified in 1998, 28 years ago. Practices with Balboa Nephrology Medical Group Inc, a 79-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
28
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

1955 Citracado Pkwy Ste 301
Escondido, CA 92029-4113
Phone: (760) 294-1660
Fax: (760) 745-5016
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nephrology Physician (primary) Taxonomy 207RN0300X · Licence A68100 (CA)

Record details

NPI number1104881457
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 19, 2006
Last updated in NPPESJanuary 16, 2026
Certification dateJanuary 16, 2026
Mailing address9373 Hazard Way Ste 200, Ste 200, San Diego, CA 92123-1226

Medicare enrollment

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

Medicare specialtyNEPHROLOGY
Medical schoolOTHER
Graduated 1998 (28 years in practice)
Group practice Balboa Nephrology Medical Group Inc — 79 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations7 on file with Medicare

Other providers in Escondido