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

Dr. Frederick Joseph Nachtwey, MD

Individual provider Sleep Medicine (Internal Medicine) Physician · NPI 1710901822

Dr. Frederick Joseph Nachtwey, MD is a Pulmonary Disease in Walnut Creek, California. Graduated from Washington University School of Medicine in 1974, 52 years ago. Practices with Bass Medical Group, a 292-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
52
Trained at
Washington University School of Medicine
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

2637 Shadelands Dr
Walnut Creek, CA 94598-2512
Phone: (925) 944-0166
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 2101 Vale Rd Ste 300, San Pablo, CA 94806-3846 — (510) 233-3788

Specialties & licences

Pulmonary Disease Physician (primary) Taxonomy 207RP1001X · Licence G35274 (CA)
Sleep Medicine (Internal Medicine) Physician Taxonomy 207RS0012X · Licence G35274 (CA)

Record details

NPI number1710901822
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJuly 26, 2006
Last updated in NPPESMarch 3, 2025
Certification dateMarch 3, 2025

Medicare enrollment

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

Medicare specialtyPULMONARY DISEASE
Also practisesINTERNAL MEDICINE, SLEEP MEDICINE
Medical schoolWASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 1974 (52 years in practice)
Group practice Bass Medical Group — 292 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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