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

Leif R Hass, MD

Individual provider Hospitalist Physician · NPI 1528175346

Leif R Hass, MD is a Hospitalist in Oakland, California. Qualified in 1993, 33 years ago. Practices with Sutter Bay Medical Foundation, a 3,762-clinician group, works from 10 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
33
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.

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Practice location Address checks out

350 Hawthorne Ave Rm 2346
Oakland, CA 94609-3108
Phone: (510) 869-6883
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (9)

  • 500 San Pablo Ave, Albany, CA 94706-1103 — (510) 204-8130
  • 4053 Lone Tree Way Ste 101, Antioch, CA 94531-6210 — (925) 756-3400
  • 2500 Milvia St, Berkeley, CA 94704-2636 — (510) 204-5600
  • 2850 Telegraph Ave Ste 130, Berkeley, CA 94705-1159 — (510) 204-8110
  • 350 John Muir Pkwy Ste 105, Brentwood, CA 94513-5183 — (925) 776-7725
  • 20101 Lake Chabot Rd Fl 3, Castro Valley, CA 94546-5305 — (510) 886-3400
  • 350 30th St Ste 100, Oakland, CA 94609-3422 — (510) 204-8290
  • 12 Camino Encinas, Orinda, CA 94563-3304 — (510) 204-8180
  • 12 Camino Encinas Fl 2, Orinda, CA 94563-3304 — (510) 204-8166

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence G80367 (CA)
Family Medicine Physician Taxonomy 207Q00000X · Licence G80367 (CA)

Record details

NPI number1528175346
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 25, 2006
Last updated in NPPESApril 11, 2019

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Also practisesFAMILY PRACTICE
Medical schoolOTHER
Graduated 1993 (33 years in practice)
Group practice Sutter Bay Medical Foundation — 3762 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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